MR VENOGRAPHY OF THE DEEP VEINS OF THE LO WER-EXTREMITY BY DRIP INFUSION

Purpose: To enhance flow signals in the deep Veins of the lower extrem ity by means of a drip infusion. Methods: Saline solution and diluted contrast media were consecutively administered in 8 healthy volunteers by drip infusion (3 ml/min) via the cubital vein. Imaging of the deep Veins in both legs was performed using a gradient echo sequence with flow compensation. Changes of the intravascular signal-to-noise-ratio (SNR) were correlated with the duration of the drip infusion. Results: Improved SNR were detected in each level examined in both thigh and c alf. SNR increases up to 157% were opposed to decreases of less than 1 6%. The average rise of SNR was up to 55% in the calf veins. Conclusio n: Saline drip infusion is a simple and valuable method for enhancemen t of venous flow signals and should be administered routinely in time- of-flight venographies.