Radiology News
PET dose-painting methods produce discordant results
August 27, 2008 -- As intensity-modulated radiation therapy becomes more sophisticated, oncologists are investigating new dose-painting methods to determine which areas of tumor target volume should receive additional radiation dose. But a new study indicates that two promising methods to guide dose painting actually produce sharply varied results.
Automated polyp measurement supports risk assessment
August 26, 2008 -- Automated polyp-measurement software performed as well as human readers in a study that could lead to more efficient screening with virtual colonoscopy. The study sought to evaluate the accuracy of an automated polyp size measurement tool and its effectiveness for risk stratification in 305 subjects.
ROI changes colorectal tumor perfusion measurements
August 26, 2008 -- The development of automated perfusion-mapping software for CT data has opened up intriguing possibilities for the assessment of tumor vascularity, specifically for monitoring response to antiangiogenic drug treatment. But where, precisely, to measure tumor vascularity is a question that had not been addressed, according to U.K. researchers.
Quantitative stress echo can reliably find coronary artery disease
August 18, 2008 -- Quantitative stress echocardiography with contrast-based myocardial blood flow measurements can successfully detect coronary artery disease, according to research published online in Heart.
PET with C-11 PiB can assess beta-amyloid brain deposits
August 12, 2008 -- PET using carbon-11-labeled Pittsburgh Compound B (C-11 PiB) shows promise for assessing beta-amyloid deposits in the brain and may have a potential role as a diagnostic aid for early Alzheimer's disease, according to research published online in the Archives of Neurology.
US-guided core-needle breast biopsy offers alternative to surgery
August 7, 2008 -- Researchers at the Medical University of Vienna and Memorial Sloan-Kettering Cancer Center studied 14-gauge ultrasound-guided biopsy's false-negative and underestimation rates, concluding that the technique provides an accurate alternative to surgical excision for evaluating nonpalpable breast lesions.
PACS data-mining tool analyzes CR retake rates
August 5, 2008 -- Researchers from Spain have developed software that analyzes PACS data to automatically perform quality control analysis of retake rates of computed radiography studies. They believe their QC tool could make it easier for imaging facilities to reduce retakes and improve the overall quality of service.
Image tools cut false positives in unprepped VC
August 4, 2008 -- Aiming to optimize the results of prepless vitual colonoscopy, researchers have developed a pair of tools to process unprepped CT data and make it easier to read. According to the results of a pilot study, the methods reduced false positives by as much as one-third.
Gestix device gives brain surgeons a hand in the OR
July 31, 2008 -- How could the amount of operating room time scheduled for complex brain surgery some day be dramatically reduced? With a wave of the hand -- more specifically, through a graphical user interface that responds to hand motions rather than keyboard or mouse commands.
FOBT-screened cohort yields too many positives for VC
July 28, 2008 -- Virtual colonoscopy (VC) seems a promising way to sort through patients with a positive fecal occult blood test (FOBT), considering the latter's demonstrated low sensitivity and high false-positive rate. But in a screening cohort from the Netherlands, polyps and cancer were so common in FOBT patients that VC hardly seemed worth it.
Time doesn't diminish risk of cancer relapse after lumpectomy and RT
July 21, 2008 -- The risk of developing cancer again in the same breast after breast-conservation surgery and radiation therapy does not diminish over time, a long-term study of more than 1,000 women with stage I and stage II breast cancer has revealed.
Higher VC laxative dose burdens patients, doesn't improve reads
July 16, 2008 -- Researchers from the Netherlands report that higher levels of catharsis conferred neither better image quality nor improvement of tagging characteristics on image data, compared to images from subjects given lower laxative doses.
Smoking during radiation therapy reduces treatment benefit
July 16, 2008 -- Patients with non-small cell lung cancer who smoke during the weeks they receive radiation therapy may reduce their overall benefit of treatment. Smoking has a significant negative effect as measured by several factors for assessing radiation therapy's effectiveness, according to study results.
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