Abstract #4366

Simultaneous Time-Encoding for Bi-Polar (STEP) MRA combining Arterial Spin Labeling (ASL) and Phase-Sensitive Inversion Recovery Black-Blood (PSIR-BB)

Tokunori Kimura¹, Naotakata Sakashita¹, and Mitsue Miyazaki²

¹Toshiba Medical Systems, Otawara, Japan, ²Toshiba Medical Research Institute, Vernon Hills, IL, United States

We proposed and assessed a simultaneous time-encoding for bipolar MRA technique (STEP-MRA), combining both the 4DASL-MRA of nulling background signals and PSIR BB-MRA with preserving Mz polarities and background stationary signals, which allows simultaneously providing using the same acquired data as the standard 4DASL-MRA. In addition, vessel visualization and SNR were improved by synthesizing multiple TI data. Although further parameter optimization and clinical evaluation are required, our proposed method has a potential to provide various information with limited acquisition data.

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