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|Articles|June 1, 2007
Dose can drop in large patients
The trade-off between image noise and radiation exposure in low-dose multislice CT for kidney stone detection has not been kind to overweight patients. They are often excluded from low-dose studies, scanned at higher doses, or scanned repeatedly with normal doses.
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The trade-off between image noise and radiation exposure in low-dose multislice CT for kidney stone detection has not been kind to overweight patients. They are often excluded from low-dose studies, scanned at higher doses, or scanned repeatedly with normal doses. A 4D tube current modulation-adapted to the x-, y-, and z-planes continuously during scanning-was found to reduce dose by more than 60% without affecting accuracy in overweight patients (AJR 2007;188:553-562).
Dr. Tom H. Mulkens, a radiologist at Heilig Hart Hospital in Lier, Belgium, and colleagues concluded that this technique could become standard in overweight and obese patients with suspected acute renal colic.
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