Effect of dose bisection at 3 Tesla on contrast-enhanced magnetic resonance angiography of the renal arteries

Purpose: To prospectively and intraindividually compare 0.1 mmol/kg gadodiamide at 3.0T with 0.2 mmol/kg gadodiamide at 1.5T for magnetic resonance (MR) angiography of the renal arteries. Methods: Institutional review board approval was granted and patients signed informed consent before enrollment. 22 patients (14 men, 8 women; mean age, 66.5 years) underwent two MR angiographic examinations of the renal arteries separated by 24 hours on a respective whole-body 1.5T and 3.0T MR system in random order applying a phase-encoded three-dimensional spoiled breath-hold pulse sequence. Two radiologists blinded to the p…