Eric Barnes

CT
Positive trial results boost VC's prospects for broader screening role
BOSTON - To those in attendance at the opening of the International Symposium on Virtual Colonoscopy on Monday, the outlook for virtual colonoscopy appeared bright. In the run up to this year's meeting, two major studies released in as many weeks had judged the virtual exam equivalent to optical colonoscopy in important measures of efficacy, lending more support for including virtual colonoscopy as a colorectal cancer screening option.
October 15, 2007
Digital X-Ray
MR studies gauge heart risk after myocardial infarction
A pair of new studies examines cardiac MRI's ability to predict adverse outcomes in patients with evidence of a previous myocardial infarction (MI). Researchers from Sweden studied whether MI scars represented early damage from atherosclerosis, while a team from Germany and California examined whether infarct size could be used to predict left ventricular modeling.
October 14, 2007
Digital X-Ray
CTA improves as first-line test for traumatic neck injury
There are clinical guidelines for determining which trauma patients should undergo CT of the neck, but there is little definitive advice on which patients should undergo CT angiography (CTA) to screen for blunt cerebrovascular injury (BCVI). Dr. Michael Lev, director of emergency neuroradiology at Boston's Massachusetts General Hospital, discusses the use of extracranial vascular imaging, particularly CTA, in blunt trauma patients admitted to the emergency department.
October 11, 2007
CT
Michigan heart center aims DSCT guns at image quality
Doctors at William Beaumont Hospital in Royal Oak, MI, do a lot of heart imaging with their dual-source CT (DSCT) scanner. Many of their coronary CT angiography patients come from the emergency room with obesity, significant comorbidities, and worries sufficient to keep their hearts racing during the scans. Center director Dr. Gilbert Raff recently discussed the patient demographics, processes, and results that led to the group's current protocols for DSCT.
October 7, 2007
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CT
Study of two large screening cohorts favors VC over OC
In one of the largest studies so far to compare virtual colonoscopy and optical colonoscopy screening results, the two exams showed very similar detection rates for advanced adenomas in two similar cohorts, according to researchers from the University of Wisconsin Medical School in Madison.
October 3, 2007
Clinical News
AuntMinnie.com Cardiac Insider
October 2, 2007
CT
Dual-source coronary CTA largely unaffected by heart rate
As multidetector CT scanners have added detector rows over the years, faster and faster heart rates have been required to cause motion artifacts significant enough to reduce the diagnostic accuracy of coronary CT angiography (CTA). Researchers in Europe recently studied how dual-source CT performs with high heart rates, and found that diagnostic image quality is sufficient for a wide range of heart rates and heart rate variability.
October 2, 2007
Clinical News
Weed out variability, bias in trial design
ARLINGTON, VA - Study end points -- such as sensitivity, specificity, and the area under the curve -- are crucial for gauging the effectiveness of an imaging modality being tested for application in a clinical trial. Equally important is what goes into those end points, according to Jeffrey Blume, Ph.D., from Brown University's Center for Statistical Sciences in Providence, RI.
September 30, 2007
CT
Polyp ranking scheme boosts CAD efficiency
When virtual colonoscopy computer-aided detection (CAD) software is set to achieve maximum sensitivity for polyp detection, it also tends to output large numbers of false positives. But when sensitivity is set too low, true positives are missed. A new method aims to speed up CAD processing by determining from the start which polyps are likely to be deemed false positives, then eliminating them from further analysis.
September 30, 2007
2007 09 26 09 53 08 706
CT
ACRIN trial shows VC ready for widespread use
ARLINGTON, VA - Trial results unveiled today marked the apparent end of a long road to validation for virtual colonoscopy, a radiology-based colon screening exam whose advocates have toiled for more than a decade to show equivalent detection sensitivity in a large screening trial compared to more invasive optical colonoscopy.
September 27, 2007
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New benchmark helps monitor cumulative CT radiation dose
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A group in the U.K. has developed neural networks for interpreting chest x-rays that could help speed the adoption of AI systems in clinical settings.
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How can MRI staff reduce the impact of radiofrequency-induced heating? Are tattoos and implantable medical devices safe? What are the special risks in 7-tesla MRI? A prize-winning RSNA 2023 exhibit addressed these and other questions.
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The quench button should still work in cases of power loss and redundancy and automatically self-checks for functionality.
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