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...study published today in the Journal of the American Medical Association shows that radiation from a high-resolution cardiac CT scan-the newest, noninvasive test for detecting heart disease-may slightly raise patients' lifetime risk of developing cancer. In general, the study found, the elevated risk of cancer was greatest for women and younger patients...
...Andrew Einstein, a cardiologist at the Columbia University College of Physicians and Surgeons, researchers calculated the lifetime attributable cancer risk associated with radiation exposure from a single scan (called computer tomography coronary angiography, or CTCA), based on the patient's sex and age. For example, the lifetime cancer risk following one CTCA was just 1 in 3,261 for an 80-year-old man; that risk jumped to 1 in 284 for a 40-year-old woman, and climbed higher still to 1 in 143 for a 20-year-old woman. At all ages for women, the risk of breast...
...question clinicians will need to consider is whether the benefits of CTCA outweigh the risks. In absolute terms, the lifelong attributable risk of cancer per CTCA scan was low, ranging from 0.02% (for an 80-year old man, with the dose-reduction strategy) to 1% (for a 20-year-old woman, with a regular heart and aorta scan). The benefits of CTCA are that it is noninvasive, quick (the test takes about 10 minutes), requires that the patient ingest less contrast dye than with other scans and can be performed immediately in an emergency room when someone is admitted with...
...routinely used diagnostic nuclear stress test, which also detects plaque deposits, but only those that are big enough to block 70% of the artery. "The risk-benefit assessment is in favor of cardiac CT to be used in a judicious fashion," says Lepor, who describes good candidates for the scan as male, over age 40 with at least one risk factor. But there's no need to image patients who don't have any risk factors. "This is not a test that should be done in any routine or repetitive fashion," says Lepor...
...resist when I was with my drinking buddies, hearing the clink of glasses and bottles, seeing others imbibe and smelling the aroma of wine or beer. The researchers at McLean have invented a machine that wafts such odors directly into the nostrils of a subject undergoing an fMRI scan in order to see how the brain reacts. The reward circuitry in the brain of a newly recovering alcoholic should light up like a Christmas tree when stimulated by one of these alluring smells...