Hybrid lung segmentation software boosts performance February 13, 2008 -- A lung segmentation algorithm that combines the advantages of standard and more sophisticated approaches yields fast and accurate results, according to researchers from the University Medical Center Utrecht in the Netherlands.
Model finds polyp surveillance effective for cancer prevention January 21, 2008 -- The risk of developing colorectal cancer from polyps found at virtual colonoscopy but left unresected is not precisely known, and the practice of polyp surveillance is still controversial. But a new study concludes that the low likelihood of advanced neoplasia combined with the high cost of colonoscopy argue against the immediate removal of small lesions.
Coronary CTA study aims for lowest dose January 11, 2008 -- A study from Switzerland concludes that low-dose prospectively gated coronary CT angiography (CTA) is both feasible and promising, but not without wrinkles. Relying on prospectively triggered gating and some of the lowest radiation doses yet achieved for prospectively gated coronary CTA, the team reported that 95% of all coronary segments achieved diagnostic image quality, but image quality was very dependent on heart rate.
Gadolinium release linked to overall stability of contrast agent, may trigger NSF January 9, 2008 -- German researchers believe they have found a qualitative correlation between nephrogenic systemic fibrosis (NSF)-like symptoms and the release of free gadolinium in an experimental study. In this animal model, a multiple-injection scheme was used to replicate the prolonged systemic exposure to contrast media that is experienced after repeated gadolinium administration in patients with severe renal impairment.
Headgear: Is radiosurgery the right treatment for trigeminal neuralgia? December 31, 2007 -- The nerve disorder trigeminal neuralgia (TN) is not that common, but with the median age of 67 at diagnosis it has the potential to be a widespread health issue among aging baby boomers. Radiosurgery has gained popularity as a way to manage TN, but will it become the gold standard treatment? Neurosurgeons who work with radiosurgery praise it as being faster, safer, and just as effective as traditional management methods.
Sublingual nitroglycerin improves coronary CTA December 31, 2007 -- Nitroglycerin significantly improves the results of coronary CT angiography (CTA) by dilating the coronary arteries before scanning, researchers in Belgium have reported. Their study found that vessel lumen diameters and average volumes were larger when nitroglycerin spray was administered sublingually before scanning. Their study appears in the January issue of the American Journal of Roentgenology.
Dual-source CTA improves temporal resolution for cardiac imaging December 28, 2007 -- (Radiology Review) Dual-source CT angiography (CTA) enables noninvasive, functional cardiac analysis, including accurate assessment of left ventricular myocardial function and reliable evaluation of regional wall motion, according to a pilot study by German researchers.
VC program takes off in nonacademic setting December 21, 2007 -- Radiologists in Belgium have built a popular virtual colonoscopy practice they credit with increasing awareness of colorectal cancer screening in their community and reducing unnecessary optical colonoscopies. The screening model offers a glimpse of what U.S.-based community screening practice might look like with a bit of reimbursement.
DSCT matches angiography for stenosis detection -- even in fast hearts December 4, 2007 -- Dual-source CT (DSCT) offers diagnostic accuracy comparable to that of invasive coronary angiography when it comes to identifying significant coronary artery stenoses, according to researchers from Germany. To test whether DSCT could match angiography in accuracy, they examined patients with suspected coronary artery disease and found DSCT angiography offered high sensitivity for detecting stenosis.
US-based minimally invasive treatments prove feasible for uterine fibroids November 20, 2007 -- When it comes to the ultrasound-based treatment of uterine fibroids, clinicians should target patients whose benign tumors are not too big or not too small, according to two new studies. Researchers from Italy found that that percutaneous sonography-guided radiofrequency thermal ablation (RFA) was particularly adept at shrinking medium-sized fibroids, while a Japanese team found that MR-guided focused ultrasound (MRgFUS) surgery was an optimal therapy option for fibroids with specific characteristics on preoperative imaging.