ATLANTA, GA — April 29, 2002 — Radiologists can use about half the conventional radiation dose when conducting CT scans of patients with suspected renal colic, and still get clinically acceptable images, a new study shows. Renal colic is a condition that results from renal stones. It affects as many as 1 in 10 Americans, and is more commonly found in the southeast United States.
A series of CT scans using the conventional dose (240 mAs) were conducted on 17 patients who had renal colic. These patients also underwent a similar series of scans using a lower dose (120 mAs) of radiation, says James Bell, MD, a gastrointestinal radiologist at Vancouver General Hospital in Vancouver, Canada, and the lead author of the study. Three radiologists then reviewed the scans to determine if they could clearly see normal structures, including the urinary tract, and signs of renal stone disease or other conditions that could explain the patient's symptoms, Dr. Bell says.
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