Eric Barnes[email protected]CTLow-energy, high-current CT nabs tiny liver lesionsLAS VEGAS - Dual-energy CT using different tube energy (kVp) settings can be used to distinguish imaging targets with similar densities but different attenuation properties, thereby increasing the conspicuity of contrast-enhanced lesions.May 14, 2008CTClinically significant contrast-induced nephropathy rareLAS VEGAS - Retrospective studies have shown that contrast-induced nephropathy (CIN) following CT occurs in about 1% to 12% of patients undergoing contrast-enhanced CT. These studies also demonstrate an association between CIN and mortality. However, a new prospective study presented at the 2008 International Symposium on Multidetector-Row CT found that contrast-enhanced CT can be safely performed in most patients with chronic kidney disease.May 13, 2008CTGE focuses on high-res CT with launch of LightSpeed CT750 scannerGE Healthcare is announcing today the commercial launch of LightSpeed CT750 HD, a new CT scanner that the Chalfont St. Giles, U.K.-based company believes breaks new ground in high-resolution imaging. The 64-slice system incorporates a battery of technical innovations aimed at boosting image quality from top to bottom, particularly in body imaging.May 12, 2008CTMRI edges out CT in postinfarct myocardial studiesAddressing the important question of myocardial viability after reperfusion therapy, a new study found that higher contrast-to-noise ratios gave cardiac MRI an edge over 64-slice CT. The study compared 64-slice CT and cardiac MRI for assessing myocardial enhancement and infarct size early after acute reperfused myocardial infarction.May 7, 2008CTVC CAD finds polyps in prepped or unprepped patientsThe emergence of preparation-independent computer-aided detection (CAD) for virtual colonoscopy is a sure sign of the growing sophistication of the software. Researchers from Boston recently reported on an investigational CAD scheme that successfully analyzed both cleansed and uncleansed patients, tagged and untagged cases, to detect colorectal polyps and distinguish them from fecal material.May 5, 2008CTGround-glass nodule features on CT reveal malignancy riskResearchers are peering through a proverbial glass, darkly, to study the features of ground-glass opacities (GGOs). GGOs are being detected with increasing frequency as more thin-section CT lung scans are performed to check for cancer in smokers and former smokers. Distinguishing benign from malignant GGOs is a hit-or-miss task for CT, one that could potentially improve if researchers are able to find reliable signs of malignancy or benignity, thereby reducing the need for invasive biopsy.April 28, 2008CTCoronary CTA interpretation skills improve slowlyTrained but inexperienced readers of coronary CT angiography (CTA) studies improved their performance significantly over a year's time, though they fell short of expert readers' results, according to a study from Erasmus University Medical Center in Rotterdam, Netherlands. The study suggests that coronary CTA training programs lasting less than one year may be too short.April 27, 2008CTCT shows gallbladder rupture in acute cholecystitisThe accurate diagnosis of gallbladder rupture with acute cholecystitis is key to arranging timely surgery and preventing serious outcomes. But the condition often goes undiagnosed until it's too late. CT can help save lives by reliably detecting ruptures presurgically if clinicians look for the signs, according to researchers from Taiwan.April 22, 2008CTFalse-positive CAD marks don't hinder VC readers' accuracyTechnology may get top billing in developing computer-aided detection (CAD) schemes, but psychology also plays a leading role. In a new study, U.K. researchers assessed the effects of false-positive CAD detections on virtual colonoscopy reader specificity and reporting times in a patient population with a low prevalence of cancer.April 20, 2008CTMinimal-prep VC may miss more flat lesionsVirtual colonoscopy achieved high overall sensitivity in a three-part study that examined patients with minimal-prep VC, then standard-prep VC and conventional colonoscopy. But the tagged, minimal-prep protocol tended to miss more flat lesions, according to the researchers.April 16, 2008Previous PagePage 162 of 258Next PageTop StoriesCTNew benchmark helps monitor cumulative CT radiation doseThe findings highlight the need for systematic dose tracking and rigorous justification of imaging.Radiation Oncology/TherapyStudy questions routine use of radiotherapy after bone surgeryUltrasoundCEUS outshines color Doppler imaging for indeterminate kidney lesionsWomens ImagingWomen's Imaging MinnieCast, Episode 2: Risk-based vs. annual mammography screening, part 1Digital X-RayChest x-rays reveal atherosclerosis in patients undergoing amputations