Technical Feasibility of Three-Station Time-Resolved Bolus Chase MRA

Casey P. Johnson¹, Eric A. Borisch¹, James F. Glockner¹, Thomas W. Polley², Phillip M. Young¹, Stephen J. Riederer¹

Time-resolved bolus chase MRA of the thighs, calves, and feet is demonstrated using a single injection of contrast material. Diagnostic quality 3D time frames were reconstructed in real-time for visually-guided triggering of table motion to the calf and foot stations. A CAPR acquisition was used in combination with 2D SENSE acceleration to image with both high spatial (1.0-1.2 mm) and high temporal (2.4-7.6 sec) resolution at each station. This method allows imaging of high quality arteriograms of the peripheral vasculature devoid of venous signal without use of a timing bolus or other estimates of bolus transit time.