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.
Functional MRI may help with prognosis for comatose patients
October 26, 2009 -- French researchers have found good agreement between functional MRI (fMRI) and FDG-PET in assessing brain function in comatose patients. Their research indicates that fMRI potentially could help guide treatment of these individuals.
Ignoring breast CAD detections cuts sensitivity
October 23, 2009 -- Computer-aided detection (CAD) is effective at finding breast cancers -- including lesions that would have otherwise been missed by experienced radiologists. Unfortunately, CAD's overall benefit is diluted by the downside of radiologists ignoring true-positive CAD marks.
Contrast ultrasound may spot early signs of atherosclerosis
October 20, 2009 -- Contrast-enhanced ultrasound (CEUS) can allow for reliable quantification of the neovascularization of the carotid artery vasa vasorum, enabling early identification of a condition that can be a precursor to atherosclerosis, according to a presentation at this week's Advances in Contrast Ultrasound: ICUS Bubble Conference in Chicago.
'Spontaneous regression' debate erupts anew at ASCO symposium
October 12, 2009 -- SAN FRANCISCO - Is it possible that some breast cancers "spontaneously regress" and would otherwise become harmless if they weren't detected on screening mammography? The controversial theory was the topic of a heated debate at last week's American Society of Clinical Oncology's (ASCO) Breast Cancer Symposium.
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