Meeting Banner
Abstract #0030

Feasibility of Single Breath-Hold Renal Perfusion Imaging at 7T

Xiufeng Li1, Carl Snyder1, Pierre-Francois Van de Moortele1, Kamil Ugurbil1, Gregory J. Metzger1

1Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, United States

Due to the intrinsically low signal noise ratio nature of ASL imaging, lengthy signal averaging and correspondingly long imaging acquisition times are usually needed in renal perfusion imaging at lower fields, which not only makes imaging sensitive to physiological motion but also imposes critical limitations on its application in patients. The increased SNR, prolonged longitudinal relaxation times, and better parallel imaging performance of ultra high field provide the potential to reduce imaging acquisition time and motion-associated artifacts. The feasibility of single breath-hold renal ASL perfusion imaging at 7T was evaluated and reported in this abstract.

Keywords

absorption according achieved acquisition acquisitions adiabatic allowing alternating although aorta application array arterial artifacts averaging better breath calibration channel choice coil contrast control coronal covering critical decreasing degree delays density deposition descending diagrams disease distribution dummy edge efficiency establish evaluated evaluation even expiration fair fast feasibility feasible field fields flow foot foundation function funding future gradient head hold hyper imposes improved included intrinsically inversion ionizing kidneys labeling lengthy limit limitation limited limiting local long longer longitudinal made makes maps materials matrix maximal modality moderate motion nature near need noise normalized oblique otherwise overcome oversampling pairs parallel patients peak performance perfusion physiological placed post power press prior processing prolonged protocol proton providing pseudo pulse pulsed radiation readout recovery reduce reduction renal required requiring respectively risk selective sensitive series several shah shimming short significantly simultaneously slabs slice solution solutions spin steady studies subjects suited term transmit transplantation typical unfortunately user usually volume whole