CAD catches most flat polyps on virtual colonoscopy December 16, 2009 -- Computer-aided detection (CAD) is sensitive for all but the flattest of flat colorectal lesions, even in minimally prepped patients, according to a new study from Italy. Using CAD, radiologists significantly improved their ability to detect the elusive polyps, which can harbor precancerous lesions.
Caution urged on early mammography for high-risk women December 11, 2009 -- Women at high risk of breast cancer should be cautious about undergoing mammography or other chest x-ray studies before the age of 30 due to the risk that radiation exposure might trigger cancer, according to research presented at last week's RSNA meeting in Chicago.
Contrast dose halved in coronary CTA December 2, 2009 -- CHICAGO - Contrast doses for CT angiography (CTA) are too high, but they can be lowered substantially with the right equipment and careful attention to technique, according to researchers from Charité University Medical School in Berlin.
Coronary CTA edges CMR in a tight race December 1, 2009 -- CHICAGO - In a head-to-head comparison of two closely watched modalities, low-dose dual-source coronary CT angiography (CTA) outperformed cardiac MR (CMR) in sensitivity, specificity, and negative predictive value. But 1.5-tesla CMR countered with better specificity and positive predictive value.
Scientific poster digital format offers potential to transform medium November 30, 2009 -- CHICAGO - Displaying scientific posters in digital format at this year's RSNA meeting allows authors not only to convey facts, graphs, and photos, but also to incorporate some interactive functionality. Onsite digital displays offer huge potential to educate readers in ways that even the best developed paper poster cannot.
Surveillance polyps show little growth at follow-up November 30, 2009 -- CHICAGO - A preliminary study from Italy adds weight to the argument that two- to three-year surveillance of 6- to 9-mm polyps doesn't unduly increase the risk of colorectal cancers. Diminutive polyps grow faster but present less cause for concern.
Optical sensor tracks radiotherapy treatment site breast motion November 26, 2009 -- Postsurgical radiotherapy is an effective way of preventing breast tumors from reappearing, but the downside is the mismatch between ideal treatment plans and the doses actually delivered. Although conformal methods of delivery could address this issue, switching delivery techniques raises another potential problem: Will breast motion compromise the accuracy of a highly targeted radiotherapy regimen?
Automated segmentation could improve fetal heart echo November 6, 2009 -- A new method of segmenting the fetal heart with echocardiography could improve the evaluation of congenital heart defects compared to the time-consuming manual segmentation in use today, according to researchers from the U.K.
Meta-analysis reveals paucity of advanced neoplasia in small polyps November 2, 2009 -- The prevalence of advanced neoplasia in subcentimeter polyps is extremely rare, according to a new meta-analysis of virtual colonoscopy data from more than 20,000 patients. As a result, the study authors believe that it's unnecessary to incur the costs and risks associated with resecting diminutive colorectal lesions detected at VC.