Aurelien F. Stalder1, Zhi Yuan Dong1, Yang Qi1, Jelena Bock2, Jrgen Hennig2, Michael Markl2, Kun Cheng Li1
1Dept. of Radiology, Xuanwu Hospital of Capital Medical University, Beijing, China, People's Republic of; 2Dept. of Radiology - Medical Physics, University Hospital Freiburg, Germany
4D flow-sensitive MRI was performed in the thoracic aorta of 11 healthy volunteers at 3T using 12- and 32-channel coils and parallel imaging (GRAPPA) with accelerations R=2 and R=3. SNR, velocity divergence and streamlines length quantification as well as semi-quantitative image grading was performed to assess data quality. R=3 allowed to save 19.55% measurement time compared to R=2 (14.22.4 min). 12 channels with R=2 and 32 channels with R=3 produced data with significantly higher quality compared to 12 channels and R=3. There was no significant difference between 12 channels with R=2 and 32 channels with R=3 but for the depiction of supra-aortic branches where the 32-channel coil was superior.