Radiology

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    Radiology / Nuclear Medicine News From Medical News Today

  • May Live Longer When Treated With Radiation Therapy

    22 Nov 2009 | 12:00 am
    Radiation therapy is effective in achieving local control and palliation in patients with pancreatic neuroendocrine tumors (PNTs), despite such tumors being commonly considered resistant to radiation therapy, according to a largest of its kind study in the November 15 issue of the International Journal of Radiation Oncology*Biology*Physics, the official journal of the American Society for Radiation Oncology (ASTRO).

  • Rare Pancreatic Cancer Patients May Live Longer When Treated With Radiation Therapy

    21 Nov 2009 | 1:00 am
    Radiation therapy is effective in achieving local control and palliation in patients with pancreatic neuroendocrine tumors (PNTs), despite such tumors being commonly considered resistant to radiation therapy, according to a largest of its kind study in the November 15 issue of the International Journal of Radiation Oncology Biology Physics, the official journal of the American Society for Radiation Oncology (ASTRO).

  • Light And Color: Healthcare Lighting Presented By Siemens

    20 Nov 2009 | 3:00 am
    At the RSNA 2009, the congress of the Radiological Society of North America, Siemens Healthcare presents "Healthcare Lighting", a concept for lighting design in medical facilities, aimed at creating a friendly and colorful environment instead of the common bland hospital atmosphere.

  • University College Hospital In London Introduces Treatments Delivering Faster Form Of Radiotherapy

    20 Nov 2009 | 12:00 am
    Two female brain tumor patients have become the first people in the south of England to be treated using a faster form of radiotherapy that extends more advanced care to more patients. RapidArc technology from Varian Medical Systems (NYSE: VAR) makes it possible to deliver image-guided IMRT (intensity modulated radiotherapy) two to eight times faster than is possible with conventional IMRT.

  • Varian Medical Systems To Showcase The Latest X-Ray Image Detectors And X-Ray Tubes At The MEDICA 2009 International Trade Fair

    19 Nov 2009 | 5:00 pm
    Varian Medical Systems, Inc. (NYSE: VAR), a premier supplier of X-ray tubes and flat panel digital image detectors, will exhibit its PaxScan digital image detectors and its line of X-ray tubes for fluoroscopy, angiography, cardiology and cone-beam CT imaging at the MEDICA 2009 International Trade Fair in Dusseldorf, Germany from November 18-21, 2009.
 
 
 
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    radROUNDS

  • Health services RSNA sessions will focus on quality, patient care process

    radRounds Radiology Network
    (DIAGNOSTIC IMAGING @ RSNA 2009) -- RSNA meeting attendees can expect health services scientific sessions to focus on quality, according to the committee chair. The sessions will define quality and how radiologists can work on the entire care experience. "We are more than the images and reports we generate," said Dr. Ruth Carlos, chair of the RSNA subcommittee on health services policy and research. "We are active participants in the patient care process, and it is up to us to make sure that when they're in our care we render the highest quality possible." One paper from Australia focuses on…

  • CT colonography papers flood the gates at McCormick Place

    radRounds Radiology Network
    (DIAGNOSTIC IMAGING @ RSNA 2009) -- Rather than retreating after the hard blow handed them by the Centers for Medicare and Medicaid Services, which refused to grant reimbursement for the application in May, CT colonography researchers will arrive at the 2009 RSNA meeting with more of what CMS wants: hard data. CMS' decision intensified the debate on CTC's worth for colorectal cancer screening and whether it should be accepted in routine practice. When it came to CTC's alleged weaknesses, the government cited a lack of conclusive data on benefits and harms to back its policy. Since then,…

  • ACR Responds to HHS Secretary Statement Regarding USPSTF Mammography Recommendations

    radRounds Radiology Network
    (RESTON, VA) -- The American College of Radiology (ACR) is pleased to see that Secretary Sebelius has reaffirmed that mammography is a vital and lifesaving tool in the battle against breast cancer. We strongly urge women and providers to continue to adhere to the current American Cancer Society and American College of Radiology policies regarding mammographic screening. Additionally, as the Task Force is referenced in health care reform legislation as a significant factor in determining which preventative services may be offered under government "insurance exchanges" outlined in the…

  • RSNA musculoskeletal sessions showcase dual-energy CT applications, including gout

    radRounds Radiology Network
    (DIAGNOSTIC IMAGING) -- RSNA Preview Musculoskeletal scientific sessions at the RSNA meeting will address the use of dual-energy CT in multiple settings, including the possibility of combined heart and bone density scans. Submitted papers also show the use of dual-energy CT for imaging other indications, such as gout. "When we do a dual-energy CT scan it requires a lot of time and a lot of imaging and so the question becomes what else can we use that data for?" said Dr. Michelle Barr, RSNA musculoskeletal subcommittee chair and associate professor of radiology at the University of Virginia…

  • Coronary CTA triages ER chest pain patients safely, inexpensively

    radRounds Radiology Network
    (DIAGNOSTIC IMAGING) -- Cardiac CTA has matched the clinical safety of a standard emergency room protocol for triaging chest pain patients with suspected myocardial infarction while cutting costs by more than a third in a multicenter randomized clinical trial involving more than 700 patients. Dr. Kavitha Chinnaiyan, a cardiologist at William Beaumont Hospital in Royal Oak, MI, described the results of the 16-center Coronary Computed Tomography Angiography for Systematic Triage of Acute Chest Pain Patients to Treatment (CT-STAT) trial Nov. 25 at the 2009 American Heart Association meeting in…
 
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    BMC Medical Imaging - Latest Articles

  • Quantifying light scattering with single-mode fiber-optic confocal microscopy

    Jeffrey LaCroix
    18 Nov 2009 | 4:00 pm
    Background: Confocal microscopy has become an important option for examining tissues in vivo as a diagnostic tool and a quality control tool for tissue-engineered constructs. Collagen is one of the primary determinants of biomechanical stability. Since collagen is also the primary scattering element in skin and other soft tissues, we hypothesized that laser-optical imaging methods, particularly confocal scattered-light scanning, would allow us to quantify scattering intensity and determine collagen content in biological layers. Methods: We built a fully automated confocal scattered-light…

  • A comparative study of cranial, blunt trauma fractures as seen at medicolegal autopsy and by Computed Tomography

    Christina Jacobsen
    15 Oct 2009 | 5:00 pm
    Background: Computed Tomography (CT) has become a widely used supplement to medico legal autopsies at several forensic institutes. Amongst other things, it has proven to be very valuable in visualising fractures of the cranium. Also CT scan data are being used to create head models for biomechanical trauma analysis by Finite Element Analysis. If CT scan data are to be used for creating individual head models for retrograde trauma analysis in the future we need to ascertain how well cranial fractures are captured by CT scan. The purpose of this study was to compare the diagnostic agreement…

  • Hippocampal volumes are important predictors for memory function in elderly women

    Martin Ystad
    21 Aug 2009 | 5:00 pm
    Background: Normal aging involves a decline in cognitive function that has been shown to correlate with volumetric change in the hippocampus, and with genetic variability in the APOE-gene. In the present study we utilize 3D MR imaging, genetic analysis and assessment of verbal memory function to investigate relationships between these factors in a sample of 170 healthy volunteers (age range 46–77 years). Methods: Brain morphometric analysis was performed with the automated segmentation work-flow implemented in FreeSurfer. Genetic analysis of the APOE genotype was determined with polymerase…

  • Disappearance of Myocardial Perfusion Defects on Prone SPECT Imaging: Comparison with Cardiac Magnetic Resonance Imaging in Patients without Established Coronary Artery Disease

    Bo Heden
    9 Aug 2009 | 5:00 pm
    Background: It is of great clinical importance to exclude myocardial infarction in patients with suspected coronary artery disease who do not have stress-induced ischemia. The diagnostic use of myocardial perfusion single-photon emission computed tomography (SPECT) in this situation is sometimes complicated by attenuation artifacts that mimic myocardial infarction. Imaging in the prone position has been suggested as a method to overcome this problem. Methods: In this study, 52 patients without known prior infarction and no stress-induced ischemia on SPECT imaging were examined in both supine…

  • Parallel imaging: is GRAPPA a useful acquisition tool for MR imaging intended for volumetric brain analysis?

    Terri Lindholm
    2 Aug 2009 | 5:00 pm
    Background: The work presented here investigates parallel imaging applied to T1-weighted high resolution imaging for use in longitudinal volumetric clinical studies involving Alzheimer's disease (AD) and Mild Cognitive Impairment (MCI) patients. This was in an effort to shorten acquisition times to minimise the risk of motion artefacts caused by patient discomfort and disorientation. The principle question is, "Can parallel imaging be used to acquire images at 1.5 T of sufficient quality to allow volumetric analysis of patient brains?" Methods: Optimisation studies were performed on…
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    Cardiovascular Ultrasound - Latest Articles

  • Baseline and follow-up assessment of regional left ventricular volume using 3-dimensional echocardiography: comparison with cardiac magnetic resonance

    Carly Jenkins
    18 Nov 2009 | 4:00 pm
    The assessment of regional volumes is an option for analysis of the response of LV segments to interventions such as revascularization or cell therapy. We sought to compare regional volumes from 3D-echocardiography (3DE) with cardiac magnetic resonance (CMR) over follow-up.CMR regional volumes were assessed at baseline and after one year follow-up in 30 unselected patients (28men, 65+/-11years) presenting for evaluation of cardiac function with previous infarction. 3DE images were also gathered over 4 cardiac cycles and measurements were performed off-line. CMR images were obtained using a…

  • Influence of involvement of anterior leaflet versus posterior leaflet on residual regurgitation as assessed by transesophageal echocardiography in patients undergoing valve repair for mitral regurgitation due to mitral valve prolapse

    Laureta Sulcaj
    16 Nov 2009 | 4:00 pm
    Background: Repair of anterior leaflet prolapse is technically more challenging and this might influence outcomes as compared to the repair of posterior leaflet prolapse in patients undergoing surgical correction of mitral regurgitation. We investigated the association of anterior leaflet prolapse with minor residual mitral regurgitation (MR) in patients with mitral valve prolapse (MVP) who underwent valve repair. Methods: Eligible for this study were consecutive patients with severe MR due to MVP, who underwent mitral valve repair with residual MR by postpump transesophageal echocardiography…

  • Functional measurements based on feature tracking of cine magnetic resonance images identify left ventricular segments with myocardial scar

    Eva Maret
    15 Nov 2009 | 4:00 pm
    Background: The aim of the study was to perform a feature tracking analysis on cine magnetic resonance (MR) images to elucidate if functional measurements of the motion of the left ventricular wall may detect scar defined with gadolinium enhanced MR.Myocardial contraction can be measured in terms of the velocity, displacement and local deformation (strain) of a particular myocardial segment. Contraction of the myocardial wall will be reduced in the presence of scar and as a consequence of reduced myocardial blood flow. Methods: Thirty patients (3 women and 27 men) were selected based on the…

  • The ischemic preconditioning effect of adenosine in patients with ischemic heart disease

    Bita Sadigh
    4 Nov 2009 | 4:00 pm
    IntroductionIn vivo and in vitro evidence suggests that adenosine and its agonists play key roles in the process of ischemic preconditioning. The effects of low-dose adenosine infusion on ischemic preconditioning have not been thoroughly studied in humans.AimsWe hypothesised that a low-dose adenosine infusion could reduce the ischemic burden evoked by physical exercise and improve the regional left ventricular (LV) systolic function.Materials and methodsWe studied nine severely symptomatic male patients with severe coronary artery disease. Myocardial ischemia was induced by exercise on two…

  • Predictors of right ventricular function as measured by tricuspid annular plane systolic excursion in heart failure

    Jesper Kjaergaard
    3 Nov 2009 | 4:00 pm
    IntroductionTricuspid Annular Plane Systolic Excursion (TAPSE) has independent prognostic value in heart failure patients but may be influenced by left ventricular (LV) ejection fraction. The present study assessed the association of TAPSE and clinical factors, global and regional LV function in 634 patients admitted for symptomatic heart failure.Methods & ResultsTAPSE were correlated with global and regional measures of longitudinal LV function, segmental wall motion scores and measures of diastolic LV function as measured from transthoracic echocardiography.LV ejection fraction, wall…
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    Journal of Vascular and Interventional Radiology

  • Transvenous Variceal Embolization during or after Living-donor Liver Transplantation to Improve Portal Venous Flow

    Jin Hyoung Kim, Gi-Young Ko, Kyu-Bo Sung, Hyun-Ki Yoon, Kyung Rae Kim, Deok-Bog Moon, Sung-Gyu Lee
    31 Oct 2009 | 5:00 pm
    Purpose: Diversion of portal vein (PV) flow from the partial liver graft in living-donor liver transplantation (LDLT) can be life-threatening and warrant interruption of large collateral vessels. The purpose of this study is to evaluate the clinical efficacy of percutaneous or intraoperative transvenous embolization of portosystemic collateral vessels to improve PV inflow during or after LDLT.Materials and Methods: From 2000 to 2007, 105 of 1,435 patients (7%) who had undergone LDLT underwent percutaneous (n = 17) or intraoperative (n = 88) venography to evaluate the status of PV inflow and…

  • CME Test Questions

    31 Oct 2009 | 5:00 pm

  • Short- and Long-term Retrievability of the Celect Vena Cava Filter: Results from a Multi-institutional Registry

    Stuart M. Lyon, Guillermo Elizondo Riojas, Raman Uberoi, Jai Patel, Mario Enrique Baltazares Lipp, Graham R. Plant, Miguel A. De Gregorio, Rolf W. Günther, William D. Voorhees, Jennifer A. McCann-Brown
    31 Oct 2009 | 5:00 pm
    Purpose: To evaluate retrievability of the Celect vena cava filter over time and to assess the safety of the retrieval procedure in a prospective multicenter registry.Materials and Methods: Between October 2005 and March 2008, Celect filters were placed in 95 patients (61 men; mean age, 51 years ± 18.5) with a temporary need for an inferior vena cava (IVC) filter. All patients satisfied requirements for filter placement; the primary indications for placement were pulmonary embolism (PE) with a contraindication to or failure of anticoagulation (n = 40), high risk for further PE (n = 29),…

  • Endovascular Retrieval of Intracardiac Inferior Vena Cava Filters: A Review of Published Techniques

    Charles A. Owens, James T. Bui, M.-Grace Knuttinen, Ron C. Gaba, Tami C. Carrillo, Thomas Gast
    31 Oct 2009 | 5:00 pm
    Endovascular retrieval of intracardiac or intrapulmonary inferior vena cava (IVC) filters provides a less-invasive alternative to surgery; however, only a few publications provide details describing this approach. The authors searched the medical literature and identified 42 endovascular attempts in 35 publications. There were 29 successful retrievals from the heart (n = 28) and pulmonary artery (n = 1), with only one reported fatality. Of the 13 failed attempts, there were three reported deaths. The authors of 19 reports provided details of their technique. The endovascular approach provides…

  • Chest Port Placement with Use of the Single-incision Insertion Technique

    Hearns W. Charles, Tiago Miguel, Sandor Kovacs, Arash Gohari, Joseph Arampulikan, Jeffrey W. McCann
    31 Oct 2009 | 5:00 pm
    Purpose: To evaluate the single-incision technique for the placement of subcutaneous chest ports. Advantages, technical success, and complications were assessed.Materials and Methods: From March 2007 through May 2008, 161 consecutive chest ports were placed with a modified single-incision technique and sonographic and fluoroscopic guidance via the right internal jugular vein (IJV; n = 130), right external jugular vein (n = 1), right subclavian vein (n = 1), or left IJV (n = 28). The primary indication was for long-term chemotherapy; all patients had malignancy.Results: All single-incision…
 
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    Journal of Vascular and Interventional Radiology - Articles in Press

  • Endovascular Simulator Is of Benefit in the Acquisition of Basic Skills by Novice Operators - Corrected Proof

    Philip J.B. Coates, Ian A. Zealley, Sam Chakraverty
    19 Nov 2009 | 4:00 pm
    PURPOSE: To determine whether an electronic endovascular simulator exhibited “construct validity,” that is, the ability to differentiate between novice and experienced operators of differing levels of experience, and whether training on the simulator led to improved performance, thereby indicating “instructional effectiveness” for basic endovascular tasks.MATERIALS AND METHODS: Two separate experiments were performed by using an electronic endovascular simulator. In the first experiment, which was performed to investigate construct validity, the performance of four experienced…

  • Iatrogenic Ethanol Intoxication from Splenic Cyst Sclerosis - Corrected Proof

    Anna Arroyo Plasencia, Brent Furbee, James B. Mowry
    17 Nov 2009 | 4:00 pm
    Ethanol is a successful sclerosing agent used for vascular malformations and solid organ cysts (). Although it is generally tolerated, rare but serious complications are possible. We present a case of acute ethanol intoxication resulting in cardiovascular compromise as a complication of computed tomography (CT)–guided splenic cyst drainage with ethanol sclerosis.

  • Catheter-directed Thrombolysis for Acute Superior Mesentery Artery Occlusion: A Case Report with Long-term Clinical Follow-up - Corrected Proof

    Amit D. Malhotra, Rajiv K. Chander, Hyun S. Kim
    17 Nov 2009 | 4:00 pm
    Acute occlusion of the superior mesenteric artery (SMA) can result in devastating consequences, with mortality rates reported to be as high as 70%–90% despite standard therapies of anticoagulation and surgical exploration (). We report a case of acute mesenteric ischemia successfully managed with catheter-directed thrombolysis in a patient who remained recurrence-free during 3 years of follow-up. We believe the favorable long-term outcome of this case demonstrates the feasibility of nonoperative management in selected patients with acute SMA occlusion.

  • Joint Quality Improvement Guidelines for Pediatric Arterial Access and Arteriography: From the Societies of Interventional Radiology and Pediatric Radiology - Corrected Proof

    Manraj K.S. Heran, Francis Marshalleck, Michael Temple, Clement J. Grassi, Bairbre Connolly, Richard B. Towbin, Kevin M. Baskin, Josee Dubois, Mark J. Hogan, Sanjoy Kundu, Donald L. Miller, Derek J. Roebuck, Steven C. Rose, David Sacks, Manrita Sidhu, Michael J. Wallace, Darryl A. Zuckerman, John F. Cardella, Society of Interventional Radiology Standards of Practice Committee and Society of Pediatric Radiology Interventional Radiology Committee
    17 Nov 2009 | 4:00 pm
    THE membership of the Society of Interventional Radiology (SIR) Standards of Practice Committee represents experts in a broad spectrum of interventional procedures from both the private and academic sectors of medicine. Generally, Standards of Practice Committee members dedicate the vast majority of their professional time to performing interventional procedures; as such they represent a valid broad expert constituency of the subject matter under consideration for standards production.

  • Transjugular Intrahepatic Portosystemic Shunt for Variceal Hemorrhage due to Recurrent of Hereditary Hemorrhagic Telangiectasia in a Liver Transplant - Corrected Proof

    Marco A. Cura, Darren Postoak, Kermit V. Speeg, Rajiv Vasan
    17 Nov 2009 | 4:00 pm
    Hepatic involvement in hereditary hemorrhagic telangiectasia (HHT) consists of vascular malformations associated with arteriovenous (AV), arterioportal, and/or portovenous shunting. Most patients with HHT have liver involvement. Symptoms, although rare, consist of cardiac failure, pulmonary hypertension, portal hypertension, portosystemic encephalopathy, cholangitis, and atypical cirrhosis. Reported treatments for symptomatic AV malformations have been associated with substantial morbidity and mortality. This report describes a case of hepatic HHT that required liver transplantation after…
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    Human Brain Mapping

  • Human dopamine receptor D2/D3 availability predicts amygdala reactivity to unpleasant stimuli

    Andrea Kobiella, Sabine Vollstädt-Klein, Mira Bühler, Caroline Graf, Hans-Georg Buchholz, Nina Bernow, Igor Y. Yakushev, Christian Landvogt, Mathias Schreckenberger, Gerhard Gründer, Peter Bartenstein, Christoph Fehr, Michael N. Smolka
    10 Nov 2009 | 2:53 am
    Dopamine (DA) modulates the response of the amygdala. However, the relation between dopaminergic neurotransmission in striatal and extrastriatal brain regions and amygdala reactivity to affective stimuli has not yet been established. To address this issue, we measured DA D2/D3 receptor (DRD2/3) availability in twenty-eight healthy men (nicotine-dependent smokers and never-smokers) using positron emission tomography with [18F]fallypride. In the same group of participants, amygdala response to unpleasant visual stimuli was determined using blood oxygen level-dependent (BOLD) functional magnetic…

  • Drug effect on EEG connectivity assessed by linear and nonlinear couplings

    Joan F. Alonso, Miguel A. Mañanas, Sergio Romero, Dirk Hoyer, Jordi Riba, Manel J. Barbanoj
    5 Nov 2009 | 12:25 am
    Quantitative analysis of human electroencephalogram (EEG) is a valuable method for evaluating psychopharmacological agents. Although the effects of different drug classes on EEG spectra are already known, interactions between brain locations remain unclear. In this work, cross mutual information function and appropriate surrogate data were applied to assess linear and nonlinear couplings between EEG signals. The main goal was to evaluate the pharmacological effects of alprazolam on brain connectivity during wakefulness in healthy volunteers using a cross-over, placebo-controlled design.

  • Cortical representation of verbs with optional complements: The theoretical contribution of fMRI

    Einat Shetreet, Naama Friedmann, Uri Hadar
    3 Nov 2009 | 6:06 am
    Verbs like "eat" are special in that they can appear both with a complement (e.g., "John ate ice-cream") and without a complement ("John ate"). How are such verbs with optional complements represented? This fMRI study attempted to provide neurally based constraints for the linguistic theory of the representation of verbs with optional complements. One linguistic approach suggests that the representation of these verbs in the lexicon includes two complementation frames (one with and one without the complement), similarly to verbs that allow two different types of…

  • Influence of coherence between multiple cortical columns on alpha rhythm: A computational modeling study

    Yasushi Naruse, Ayumu Matani, Yoichi Miyawaki, Masato Okada
    3 Nov 2009 | 6:06 am
    In electroencephalographic (EEG) and magnetoencephalographic (MEG) signals, stimulus-induced amplitude increase and decrease in the alpha rhythm, known as event-related synchronization and desynchronization (ERS/ERD), emerge after a task onset. ERS/ERD is assumed to reflect neural processes relevant to cognitive tasks. Previous studies suggest that several sources of alpha rhythm, each of which can serve as an alpha rhythm generator, exist in the cortex. Since EEG/MEG signals represent spatially summed neural activities, ERS/ERD of the alpha rhythm may reflect the consequence of the…

  • The neural origin of the priming distance effect: Distance-dependent recovery of parietal activation using symbolic magnitudes

    Karolien Notebaert, Mauro Pesenti, Bert Reynvoet
    30 Oct 2009 | 5:59 am
    Numerical magnitudes are known to be processed in areas around the intraparietal sulci of the brain. We used an fMRI-adaptation paradigm to investigate how they are actually coded at the neural level. In a number identification task, we manipulated the numerical distance between prime and target numbers (same, close, and far pairs) and their symbolic notation (Arabic and verbal numerals). We show that bilateral parietal activations present a distance-dependent recovery of activation positively correlated with the distance between primes and targets: the larger the prime-target distance, the…
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    International Journal of Radiation Oncology * Biology * Physics - Articles in Press

  • Combination of Transarterial Chemoembolization and Three-Dimensional Conformal Radiotherapy for Hepatocellular Carcinoma with Inferior Vena Cava Tumor Thrombus - Corrected Proof

    Ja Eun Koo, Jong Hoon Kim, Young-Suk Lim, Soo Jung Park, Hyung Jin Won, Kyu-Bo Sung, Dong Jin Suh
    17 Nov 2009 | 4:00 pm
    Purpose: To evaluate the effects of transarterial chemoembolization (TACE) and three-dimensional conformal radiotherapy (CRT) in patients with hepatocellular carcinoma (HCC) and inferior vena cava tumor thrombus (IVCTT).Methods and Materials: A total of 42 consecutive patients who underwent TACE and CRT (TACE+CRT group) for the treatment of HCC with IVCTT were prospectively enrolled from July 2004 to October 2006. As historical controls, 29 HCC patients with IVCTT who received TACE alone (TACE group) between July 2003 and June 2004 were included. CRT was designed to target only the IVCTT and…

  • Hypofractionated Boost to the Dominant Tumor region with Intensity Modulated Stereotactic Radiotherapy for Prostate Cancer: A Sequential Dose Escalation Pilot Study - Corrected Proof

    Raymond Miralbell, Meritxell Mollà, Michel Rouzaud, Alberto Hidalgo, José Ignacio Toscas, Joan Lozano, Sergi Sanz, Carmen Ares, Sandra Jorcano, Dolors Linero, Lluís Escudé.
    10 Nov 2009 | 4:00 pm
    Purpose: To evaluate the feasibility, tolerability, and preliminary outcomes in patients with prostate cancer treated according to a hypofractionated dose escalation protocol to boost the dominant tumor-bearing region of the prostate.Methods and Materials: After conventional fractionated external radiotherapy to 64 to 64.4Gy, 50 patients with nonmetastatic prostate cancer were treated with an intensity-modulated radiotherapy hypofractionated boost under stereotactic conditions to a reduced prostate volume to the dominant tumor region. A rectal balloon inflated with 60cc of air was used for…

  • Results of a Multi-Institution Deformable Registration Accuracy Study (MIDRAS) - Corrected Proof

    Kristy K. Brock, on behalf of the Deformable Registration Accuracy Consortium
    10 Nov 2009 | 4:00 pm
    Purpose: To assess the accuracy, reproducibility, and computational performance of deformable image registration algorithms under development at multiple institutions on common datasets.Methods and Materials: Datasets from a lung patient (four-dimensional computed tomography [4D-CT]), a liver patient (4D-CT and magnetic resonance imaging [MRI] at exhale), and a prostate patient (repeat MRI) were obtained. Radiation oncologists localized anatomic structures for accuracy assessment. Algorithm accuracy was determined by comparing the computer-predicted displacement at each bifurcation point with…

  • Comparison of 18F-Fluorothymidine and 18F-Fluorodeoxyglucose PET/CT in Delineating Gross Tumor Volume by Optimal Threshold in Patients with Squamous Cell Carcinoma of Thoracic Esophagus - Corrected Proof

    Dali Han, Jinming Yu, Yonghua Yu, Guifang Zhang, Xiaojun Zhong, Jie Lu, Yong Yin, Zheng Fu, Dianbin Mu, Baijiang Zhang, Wei He, Zhijun Huo, Xijun Liu, Lei Kong, Shuqiang Zhao, Xiangyu Sun
    10 Nov 2009 | 4:00 pm
    Purpose: To determine the optimal method of using 18F-fluorothymidine (FLT) positron emission tomography (PET)/computed tomography (CT) simulation to delineate the gross tumor volume (GTV) in esophageal squamous cell carcinoma verified by pathologic examination and compare the results with those using 18F-fluorodeoxyglucose (FDG) PET/CT.Methods and Materials: A total of 22 patients were enrolled and underwent both FLT and FDG PET/CT. The GTVs with biologic information were delineated using seven different methods in FLT PET/CT and three different methods in FDG PET/CT. The results were…

  • Implementation of a New Method for Dynamic Multileaf Collimator Tracking of Prostate Motion in Arc Radiotherapy Using a Single kV Imager - Corrected Proof

    Per Rugaard Poulsen, Byungchul Cho, Amit Sawant, Paul J. Keall
    10 Nov 2009 | 4:00 pm
    Purpose: To implement a method for real-time prostate motion estimation with a single kV imager during arc radiotherapy and to integrate it with dynamic multileaf collimator (DMLC) target tracking.Methods and Materials: An arc field with a circular aperture and 358° gantry rotation was delivered to a motion phantom with a fiducial marker under continuous kV X-ray imaging at 5 Hz, perpendicular to the treatment beam. A pretreatment gantry rotation of 120° in 20 sec with continuous imaging preceded the treatment. During treatment, each kV image was first used together with all previous images…
 
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    Journal of Clinical Ultrasound

  • Dicephalic parapagus conjoined twins: A rare second trimester sonographic diagnosis

    Ahmet Mete, Fatma Bahar Cebesoy, Ebru D[idot]kensoy, [Idot]rfan Kutlar
    18 Nov 2009 | 6:25 am
    Conjoined twins are 1 of the rarest and most challenging congenital malformations. It occurs if twinning is initiated after the embryonic disc and rudimentary amniotic sac have been formed. We report a very rare case of dicephalic parapagus that was diagnosed by transabdominal sonography. © 2009 Wiley Periodicals, Inc. J Clin Ultrasound, 2010

  • A pseudoaneurysm within a subperiosteal collection in a patient with sickle cell disease

    Faye Cuthbert, Manpreet Singh Gulati, Gabriel Constantinescu, Paula Robertson
    18 Nov 2009 | 6:25 am
    Sickle cell disease involves long bones in the form of infection or subperiosteal collections. Rare pseudoaneurysm/aneurysm formation is also known to occur in the intracranial and visceral territories. We report a small subperiosteal pseudoaneurysm that developed within a subperiosteal abscess in the tibia in a patient with sickle cell disease. This case adds to the known spectrum of musculoskeletal abnormalities resulting from this condition. © 2009 Wiley Periodicals, Inc. J Clin Ultrasound, 2010

  • Therapeutic options of caesarean scar pregnancy: Case series and literature review

    A.J. Marjolein Bij de Vaate, Hans A.M. Brölmann, Johannes W. van der Slikke, Maurice G.A.J. Wouters, Roel Schats, Judith A.F. Huirne
    9 Nov 2009 | 6:22 am
    We describe our experience with the treatment of 4 caesarean scar pregnancies and provide an overview of current literature. Four women diagnosed with a caesarean scar pregnancy in our hospital between 1996 and 2007 were treated with local or systemic methotrexate and had a steady decline of the serum [beta]-hCG level. The uterus was preserved in all women and 3 of them had an uneventful subsequent pregnancy and delivery. We suggest that transcervical needle aspiration of amniotic fluid followed by intra-amniotic injection of methotrexate should be the treatment of choice, followed by…

  • Ultrasound diagnosis of dicephalic conjoined twins at 24 weeks of gestation

    Durr-e- Sabih, Zahida Sabih, Joseph A. Worrall Jr., Ali N. Khan
    9 Nov 2009 | 6:22 am
    We report the case of dicephalic conjoined twins discovered incidentally on a routine ultrasound at 24 weeks of gestation. There were 2 heads and a neck that fused with 1 thorax, but the spines continued all the way to the coccyx. The spines were connected medially by a fused rib, and laterally, there were ribs that went around the thorax in a more normal fashion. Antenatal ultrasound images are supplemented by postnatal photographs and x-rays. © 2009 Wiley Periodicals, Inc. J Clin Ultrasound, 2010

  • Rapidly involuting congenital hemangioma: A case of complete prenatal involution

    Umit Aksoy Ozcan
    6 Nov 2009 | 6:31 am
    We report a case of rapidly involuting congenital hemangioma of the flank, which was diagnosed in the 2nd trimester of gestation and showed complete involution before term. In our case sonography revealed a highly vascular soft tissue mass with smooth contours, which was isointense with the placenta on T2-weighted MR images. The fetus was born with scar tissue at the site of the lesion. To our knowledge this is the 1st reported case of rapidly involuting congenital hemangioma showing complete involution before term. © 2009 Wiley Periodicals, Inc. J Clin Ultrasound 2010
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    Radiation Oncology - Latest Articles

  • [68Ga]-DOTATOC-PET/CT for meningioma IMRT treatment planning

    Barbara Gehler
    17 Nov 2009 | 4:00 pm
    Purpose: The observation that human meningioma cells strongly express somatostatin receptor (SSTR 2) was the rationale to analyze retrospectively in how far DOTATOC PET/CT is helpful in order to improve target volume delineation prior to intensity modulated radiotherapy (IMRT).Patients and Methods: In 26 consecutive patients with preferentially skull base meningioma, diagnostic magnetic resonance imaging (MRI) and planning-computed tomography (CT) information was complemented with data from [68Ga]-DOTA-D Phe1-Tyr3-Octreotide (DOTATOC)-PET/CT. Image fusion of diagnostic tomography,…

  • Reirradiation to the abdomen for gastrointestinal malignancies

    Waqar Haque
    17 Nov 2009 | 4:00 pm
    Background: Reirradiation to the abdomen could potentially play a role in palliation of symptoms or local control in patients with gastrointestinal malignancies. Our goal was to retrospectively determine rates of toxicity, freedom from local progression and overall survival in gastrointestinal cancer patients treated with reirradiation to the abdomen. Methods: Between November 2002 and September 2008, 13 patients with a prior history of abdominal radiotherapy (median dose 45 Gy) were treated with reirradiation for recurrent or metastatic gastrointestinal malignancies. The median interval…

  • Systematisation of spatial uncertainties for comparison between a MR and a CT-based radiotherapy workflow for prostate treatments

    Tufve Nyholm
    16 Nov 2009 | 4:00 pm
    Background: In the present work we compared the spatial uncertainties associated with a MR-based workflow for external radiotherapy of prostate cancer to a standard CT-based workflow. The MR-based workflow relies on target definition and patient positioning based on MR imaging. A solution for patient transport between the MR scanner and the treatment units has been developed. For the CT-based workflow, the target is defined on a MR series but then transferred to a CT study through image registration before treatment planning, and a patient positioning using portal imaging and fiducial…

  • Audiological findings in patients treated with radio- and concomitant chemotherapy for head and neck tumors

    Ana Helena Dell'Aringa
    14 Nov 2009 | 4:00 pm
    Background: Objective: To evaluate the functionality of the auditory system in patients who underwent radiotherapy and chemotherapy treatment with cisplatin to treat head and neck tumors. Study Design: Case series with planned data collection. Setting: From May 2007 to May 2008 by the Department of Otorhinolaryngology and the Department of Oncology/Radiotherapy at Faculdade de Medicina de Marilia. Subjects and Methods: Audiological evaluation (Pure Tone Audiometry (air and bone conduction), Speech Audiometry, Tympanometry, Acoustic Reflex testing and Distortion Product Otoacoustic Emissions)…

  • Clinical-Dosimetric Analysis of Measures of Dysphagia including Gastrostomy-tube Dependence among Head and Neck Cancer Patients Treated Definitively by Intensity-Modulated Radiotherapy with Concurrent Chemotherapy

    Baoqing Li
    11 Nov 2009 | 4:00 pm
    Purpose: To investigate the association between dose to various anatomical structures and dysphagia among patients with head and neck cancer treated by definitive intensity-modulated radiotherapy (IMRT) and concurrent chemotherapy.Methods and Materials: Thirty-nine patients with squamous cancer of the head and neck were treated by definitive concurrent chemotherapy and IMRT to a median dose of 70 Gy (range, 68 to 72). In each patient, a gastrostomy tube (GT) was prophylacticly placed prior to starting treatment. Prolonged GT dependence was defined as exceeding the median GT duration of 192…
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    WordPress Tag: Radiology

  • Breast Brachytherapy Treatment Spares Implants

    Dr. Robert Kuske
    21 Nov 2009 | 9:07 am
    According to the American Society of Plastic Surgeons, the number of American women who have elected surgical breast augmentation (implants) has increased dramatically in the past few years. Their ranks swelled from 212,500 in 2000, when breast augmentation was the fourth most common type of plastic surgery, to 347,524 in 2007, by which time breast augmentation had become the single most common type of plastic surgery performed in the United States. Unrelated to their cosmetic surgery, many of these women will later face breast cancer, says Robert Kuske, a radiation oncologist in Scottsdale,…

  • Clinical Neurology, 5th EDITION

    ubugibabyshop
    19 Nov 2009 | 3:21 am
    Language: English Authors: : Greenberg, Aminoff, Simon Shipping Weight: 1.5 kg Cost : 72 rb

  • The small stuff

    chakmool
    18 Nov 2009 | 9:19 pm
    Don’t sweat the small stuff, don’t lose the forest for the trees–great advice, generally. But little things sometimes make all the difference, as I’ve learned in both my profession and my passion. My day job is radiology. I sit before a bank of flat screens and look at x-rays, ultrasounds, CTs, and MRIs—thousands of images a day. Each must be evaluated carefully, on its own and with its fellows, for every case. Often there’s just one that shows the crucial finding—an errant lymph node, a wedge of fluid where none belongs, a wayward spot in an unsuspecting brain.

  • 23 - Radiology

    retiredcommander
    18 Nov 2009 | 8:11 am
    As mentioned in post #22, I had an MRI of my shoulder done in Bethesda last June, and brought the CD to San Diego with me where I attempted to have it used by the orthopedic surgeon who’s going to be operating on my left shoulder. He could not open the file, and the Radiology Department at Balboa couldn’t, either. Balboa told me that I needed to get it in DICOM format. So I was back in Washington DC last week, and I swung by Bethesda to get a new CD with the pictures in DICOM format. The guys in Radiology told me that their files were in DICOM format. But they said that the files…

  • New Mammogram Recommendations Miss the Real Fear

    Kerri Wachter
    17 Nov 2009 | 10:46 am
    Image courtesy of NIH My 40th birthday comes in less than a month and, right on schedule, my ob.gyn handed me the paperwork last week to get my first screening mammogram.  Yesterday, the U.S. Preventive Services Task Force issued new recommendations that will now have women younger than 50 years skipping screening mammograms completely.  Will I still be getting my screening mammogram? You bet, I’ll get it done before the year is out–so that my insurance company will still pay for it. Why?  Because cancer is a truly terrifying word for most of us.  Yes, it’s an irrational…
 
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    The Radiology Portal

  • Day in the life of a PACS Administrator!

    ctdave95
    4 Nov 2009 | 3:09 pm
    Day in the life of a PACS Administrator! This might not make sense if you are not a fellow PACS administrator, but if you are, it will seem VERY familiar… I love this video so I thought I’d share it, for the PAC’s administrators!! From RadRounds Video’s © Give them a visit.

  • It’s been a while!!

    ctdave95
    2 Nov 2009 | 6:22 pm
    Well it’s been a while since I’ve posted on the Radiology Portal. It’s not because I haven’t had the time, I’ve been very busy with my other blog, and of course Dave’s Places In Radiology. I’ve updated the continuing education page at Dave’s Places, with new sites that offer ASRT approved and ARRT accepted Category A and A+ CE Credits. It’s really hard to find the free credits any more!! I’ve been busy at work in CT, new state of Ohio regs on QA testing, competencies for the tech’s, and student’s doing there rotations…

  • Radioloplis

    ctdave95
    26 May 2009 | 6:31 am
       Radiolopolis An international group of Radiologists and educators developed Radiolopolis, which is a Radiology community for education, research and clinical practice. Radiolopolis is exponentially growing with almost 700 new members since March this year – faster growing than any other radiological community. The community is focussed on only radiological professionals – radiologists, residents and technologists. What makes Radiolopolis so unique is that it concentrates multiple (some awarded) individual projects in this community, promoting in return these projects to a…

  • Dave’s Places In Radiology Listed on “Top 50 Radiology and Sonography Technician Blogs”

    ctdave95
    26 May 2009 | 6:11 am
    Dave’s Places in Radiology, and The Radiology Portal has been listed on the “Top 50 Radiology and Sonography Technician Blog” by Radiology Technician Schools. I have strived since 1996 to make my website, and blogs, the most informative, and up to date, resource and research sites for radiologist, radiographers, and student radiographers. Thank you for this honor.

  • New Updates to Dave’s Places In Radiology

    ctdave95
    5 Apr 2009 | 10:22 am
    New updates have been added to Dave’s Places In Radiology. Stop by and check them out!!
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    scan man's notes

  • SurgeXperiences 310

    Vijay
    14 Nov 2009 | 4:30 pm
    … From Blogs: Dr. Bruce Campbell, a Professor of ENT Surgery, known informally among medical bloggers as Headmirror, doesn’t think it’s a good idea to nap in the operating room and talks about the difficulty that most of us have leaving work behind even when we take a break.  Bruce, is the “Blogging Surgeon” on WUWM - Milwaukee Public Radio! Scroll to the bottom of this link and listen. It’s well worth your time. Our intrepid surgeon from the South African low veld, Bongi, has a run in with the good old boy setup that exists in all academic hospitals and…

  • SurgeXperiences 310 - Call for submissions

    Vijay
    9 Nov 2009 | 6:07 am
    … The next edition SurgeXperiences 310 will be hosted by me in this blog on November 15, 2009. Deadline for submissions is midnight on Friday, November 13. Please send in your submissions early via this form. SurgeXperiences is a blog carnival about surgical blogs. It is open to all (surgeon, nurse, anesthesia, patient, etc) who have a surgical blog or article to submit. The current edition (309) is hosted by the quilting plastic surgeon Ramona Bates. Here is the catalog of past SurgXperiences editions for your reading pleasure. If you wish to host a future edition, please contact…

  • The Week: Medical & Dental Councils of India are cancerous

    Vijay
    12 Oct 2009 | 8:59 pm
    Note: This post is related to the previous post requesting support for the NCHRH bill that is likely to be proposed in the Indian Parliament this year. Again, I would greatly appreciate any publicity that you can give for this issue. Please link, reblog, tweet, digg, stumble, or share in all the other myriad ways of Web 2.0. The current issue of The Week (only available on newstands, the website shows last week’s issue) has an article by Gunjan Sharma on the Medical and Dental Councils of India. I urge everyone to read the article. Some excerpts and my opinions (in italics)… Medical…

  • Paul Levy on Safe, Quality Hospital Care

    Vijay
    29 Sep 2009 | 12:08 am
    Note: Though this is a medical post that concerns hospital care in the USA, I believe the issues covered in these videos are universally applicable to hospitals and patients all over the world. I urge everyone, especially those visitors who are not from the USA to view the videos. In a series of three short videos, produced by Dr. Val Jones of Better Health,  Paul Levy, President & CEO of Beth Israel Deaconess Medical Center, and author of the blog Running a Hospital talks about providing safe, quality care in hospitals. In the first video Paul discusses his innovative approach to…

  • NCHRH Task Force Report & Draft Bill

    Vijay
    27 Sep 2009 | 8:46 pm
    To overcome the acute shortage and uneven distribution of human resources in public health delivery system, the Ministry of Health & Family Welfare aims at overhauling the current regulatory framework. Toward this end, it is proposed to set up a National Council for Human Resources in Health as an overarching regulatory body to achieve the objective of enhancing the supply of skilled personnel in the health sector. The general public is invited to go through the report of the Task Force and the draft bill and sent their comments / observations on the suggested provisions by the 15th…
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    X-Rayted

  • Keeping up with the Markers

    John Setzler
    14 Nov 2009 | 8:52 pm
    I stopped by the school a couple weeks ago and snagged a couple pieces of old exposed x-ray film from the lab.  I cut them to about the same width and twice the length of my ID badge and poked a hole so I could attach it to my badge holder.  This works really well for holding my markers and keeping the sticky tape mess off of my name badge holder.  So far, this is working pretty well.  My two markers with the copper backing are on the back side of this film.  I'm getting some time in the hospital in the morning.  I get a 4-hour shift from 7-11, and I'll get to…

  • Cell Phones in the Workplace?

    John Setzler
    2 Nov 2009 | 6:19 pm
    The October/November 2009 issue of the ASRT Scanner magazine has an interesting article in the "Both Sides" column this month.  The debate is: Should Cell Phones Be Allowed in the Workplace?  I hadn't spent much time thinking about this issue until I read this debate.  Under normal circumstances, I would have said NO to that question without hesitation.  Then I got to thinking about the fact that I carry mine with me into work.  This debate is rather fundamental, no matter what type of work you do.  Since I work in the health care industry, this particular…

  • Scrubs again

    John Setzler
    24 Oct 2009 | 9:45 am
    I'm still sorta settling in to this concept of being a working tech. The Landau scrubs are working out rather well, and even though they are expensive comparatively, I like them. They are well made and comfortable.  I went to search for some undershirts to wear under my scrub shirts last week.  I bought some simple t-shirts that I thought would work well, but the sleeves on those were longer than my scrub sleeves and that just didn't work for me.  I went to look for a couple other options and found some sleeveless tshirts that should work a lot better.  I wanted a crew…

  • Wrapping up my first week

    John Setzler
    15 Oct 2009 | 8:42 pm
    I can't begin to describe how great this week has been for me.  My new part-time job has been closer to full-time for my first week back in the saddle.  I worked a half day on Monday and then full days on Wednesday, Thursday, and Friday.   I was really worried about how rusty I might be after being out of the radiology department for over five months, but it's all coming back to me nicely.  I have been keeping notes on some specific things where I need a little refresher, and I plan to do some reading and studying a little over the weekend.  I haven't really seen…

  • First Day

    John Setzler
    12 Oct 2009 | 7:52 pm
    Well, it's finally here. I'm finally 'working' as a Radiographic Technologist.  I spent several hours this morning sitting in orientation sessions, getting finger printed, getting my ID badge, and filling out paperwork.  After lunch, I got to work for a half day.  Under normal circumstances, my part-time job is 'very' part-time.  I'll only be working from 8:00 - 4:30 on Thursdays.  This week, I'm going to get some extra time because the lead tech is on vacation.  I got to work 4 hours today and I'll get to work all day Wednesday, Thursday, and Friday.  That…
 
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    WordPress Tag: X-Ray

  • Cause of back pain is never found in 85% of patients. Really?! WHY?

    egoscueportland
    20 Nov 2009 | 11:30 am
    I came across an article in the New York Times in which Dr. Dennis C. Turk mentions: “The exact cause of back pain is never found in 85 percent of patients.” “REALLY?!” I immediately thought. Dr. Russell K. Portenoy said: “It’s good for the public to know how little we know.” Is it?! You might just scare the you-know-what out of every patient out there! Think about being the patient with chronic back pain who is coming to the doctor looking for answers and the doctor says, “Well, we have no idea what’s causing your pain but…”…

  • Footballer,Rolling Stones,Chilli and X Rated X Rays

    blankascanvas
    20 Nov 2009 | 5:43 am
    36 2 Go OMG…Overslept this morning…hate doing that…it throws my entire day out of synch. It was Jourdies fault…she slept at Emmas last night, so when my alarm went off..I though…Ohhhhh…I can have an extra hour because there is no school run…instead of resetting the alarm I just got back into bed….and back into a deep deep sleep…AGhhhhhhhhhhhhhhhhh I am so so glad its Friday…after last weeks attack of the pigs im still exhausted and this week has been very long indeed…chilling tonight with a glass of red…out with the gang…

  • SWAT4LS2009 - Sonja Zillner: Towards the Ontology Based Classification of Lymphoma Patients using Semantic Image Annotation

    na303
    20 Nov 2009 | 2:59 am
    (Again, these are notes as the talk happens) This has to do with the Siemens Project Theseus Medico – Semantic Medical Image Understanding (towards flexible and scalable access to medical images) Different images from many different sources: e.g. X-ray, MRI etc…use this and combine with treatment plans, patient data etc and integrate with external knowledge sources. Example Clinical Query:” Show me theCT scans and records of patiens with a Lymph Node enlargement in the neck area” – at the moment query over several disjoint systems is required Current Motivation:…

  • The King of Coughs

    Simon Hickson
    19 Nov 2009 | 4:27 pm
    Earlier this year I wrote a (hopefully) humourous piece about having asthma. Oh, that was easy then, when I was on top form, lungs working at 90% of their capacity, a peak flow of 540. Now my peak flow is down to 200, a day or two ago 100. So this leads to insane drug abuse. Mainly of steroids. I double my inhaler usage and I get the multi-purpose Amoxicillin 500 mg and then some dinky elliptical maroon pills called Prednisolone that I take six at at time and can lead to such side effects as Moon-Face and insomnia. If it’s a clear night and you wake in the middle of it, open your…

  • Medical Don'ts

    619
    19 Nov 2009 | 3:38 pm
    Originally Written by: Mendelsohn, Robert, M.D. In 1980, as he lay dying of cancer, an eminent 71 year-old internist, Dr. Frederick Stenn, made his final assessment of “Modern Medicine” in a letter to the New England Medical Journal published under the title: “Thoughts of a Dying Physician”. This is what he said: “Most physicians have lost the pearl that was once an intimate part of medicine – humanism. Machinery, efficiency, precision, have driven from the heart warmth, compassion, sympathy and concern for the individual. Medicine is now an icy science.
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    Health Imaging

  • RSNA: Virtual Radiologic showcases teleradiology solution

    20 Nov 2009 | 4:58 am
    Virtual Radiologic (Booth 7513) is showcasing an enhanced teleradiology offering at the 2009 Radiological Society of North America (RSNA) meeting in Chicago this month.

  • RSNA: Medrad highlights Certegra informatics platform

    20 Nov 2009 | 4:50 am
    Medrad (Booth 4209) is highlighting its Certegra product platform, including Certegra P3T products and Certegra Connect.PACS, at the 2009 Radiological Society of North America (RSNA) in Chicago this month.

  • Medtronic, Vital Images unveil aortic aneurysm imaging service

    20 Nov 2009 | 4:38 am
    Medtronic is partnering with Vital Images to provide imaging and advanced visualization services for endovascular specialists who use Medtronic's portfolio of stent grafts to treat aortic aneurysms.

  • House repeals 21.2% physician rate cut, SGR formula

    20 Nov 2009 | 4:25 am
    The U.S. House of Representatives voted Thursday to pass H.R. 3961, the Medicare Physician Payment Act, 243-183, altering the way Medicare pays physicians and preventing a scheduled 21.2 percent rate decrease set to take effect on Jan. 1, 2010.

  • Study: Health IT fails to reduce healthcare costs

    19 Nov 2009 | 9:00 pm
    The increased computerization of U.S. hospitals hasn't made them cheaper or more efficient, although it may modestly improve the quality of care for heart attacks, Harvard researchers reported in today's online edition of the American Journal of Medicine.
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