Eric Barnes[email protected]CTNoncathartic bowel prep facilitates, complicates virtual colonoscopySAN FRANCISCO - Studies suggest that virtual colonoscopy without cathartic bowel preparation is feasible and sufficiently accurate. More patients might be willing to get screened. But if prepless VC makes patients' lives easier, it complicates matters for radiologists. Dr. Michael Zalis from Massachusetts General Hospital in Boston discussed several issues that impact the emergence of a kinder, gentler screening exam at the International Symposium on Multidetector-Row CT.June 14, 2007CTInverse-geometry CT project promises higher image quality, fewer artifactsSAN FRANCISCO - A new research project aims to take CT imaging to the next level with a design known as inverse-geometry CT (IGCT), which incorporates multiple detector arrays for wide field-of-view imaging. Researchers from Stanford University discussed the details of their project and the new technology at this week's International Symposium on Multidetector-Row CT.June 13, 2007CTRenal artery size varies widely; stent filters don't fitA review of abdominal multidetector-row CT (MDCT) angiograms found significant size differences between left and right renal arteries, between men and women, and between patients. These differences have serious implications for the increasingly common use of distal filtering devices to prevent distal atheroembolization after percutaneous transluminal renal angioplasty (PTRA). The devices are designed for carotid and coronary arteries, and more often than not don't fit, according to the study authors.June 12, 2007CTSignificant extracolonic cancer found in VC screening patientsUnsuspected extracolonic cancers are found in about one in 300 asymptomatic virtual colonoscopy (VC) screening subjects, according to a new study of more than 5,000 individuals who underwent colon cancer screening. The results add weight to the argument that following up the most serious extracolonic findings can potentially benefit outcomes.June 11, 2007CTPatients show slight preference for MR colonography over colonoscopyMost patients who underwent MR colonography (MRC) and optical colonoscopy preferred MRI, according to a new study by researchers from Essen, Germany, and Atlanta, GA. When the patients were questioned about which colorectal screening test they'd rather have in the future, however, MR's advantage dwindled.June 5, 2007CTMarijuana increases lung cancer riskDespite the biological plausibility of marijuana being carcinogenic, and suggestions that overall lung cancer risk may be associated with pot smoking, epidemiologic findings of marijuana use have been weaker and far less consistent than studies associating tobacco smoking with lung cancer. But a new study from New Zealand finds that pot smokers do indeed face higher lung cancer rates that increase for every year of smoking, and for patients who begin smoking younger.May 31, 2007CTVC measurements more accurate than optical colonoscopyVirtual colonoscopy did a better job of measuring polyps than optical colonoscopy, and optimized 2D measurements were slightly more accurate than 3D, according to a just-published study from South Korea. The measurements affect not only thresholds for removal, but also polyp-matching algorithms in both modalities, explained the researchers from the Asan Medical Center and Seoul National University Hospital in Seoul.May 29, 2007CT256-slice CT brings new possibilities in head imagingResearchers in Japan and the U.S. are producing promising new head CT images on a work-in-progress 256-slice scanner. A major advantage of so-called area detector scanning is the ability to acquire morphologic and functional images in a single scan, yielding a clutch of new diagnostic possibilities and time-saving exam protocols.May 27, 2007CTStudy correlates CTA to angiography, myocardial perfusion SPECTAn ambitious effort to compare the results of coronary CT angiography (CTA), catheter angiography, and myocardial perfusion SPECT imaging yielded good overall agreement in patients with known or suspected heart disease. The researchers, from the Medical University of South Carolina in Charleston, believe CT could potentially replace the other modalities in patients with known or suspected coronary artery disease.May 24, 2007CTBig Japanese study finds benefit in CT lung screeningSAN FRANCISCO - A lung cancer screening study of nearly 20,000 subjects in Japan found smaller tumors and improved survival rates with CT. Another study, from Oklahoma City, confirmed that CT-detected lung nodules that were stable over two years' time would remain benign.May 23, 2007Previous PagePage 175 of 258Next PageTop StoriesMolecular ImagingPET predicts faster cognitive decline in women than menWomen initially outperformed men at low brain tau levels, but the advantage diminished as tau levels increased over time.MRIUnclear explanations of contrast MRI exams heighten patient anxietyWomens ImagingMammography screening improves survival for late-stage cancersUltrasoundUltrasound MinnieCast, Episode 2: Body imaging with RUS-PATSponsor ContentHow Agentic AI Is Transforming Radiology Ops