Abstract #2506

Motion-Free MR Imaging of Brachial Plexus using the PROPELLER technique combined with Low-Refocus Flip Angle FSE

Kojiro Ono^1,2, Yasuhiro Oikawa³, Takayuki Sakai⁴, Hirofumi Watanabe¹, Akira Shirayama¹, Takumi Okubo⁵, and Atsushi Senoo²

¹Chiba Children's Hospital, Chiba, Japan, ²Tokyo Metropolitan University, Tokyo, Japan, ³Orthopaedic Surgery, Chiba Children's Hospital, Chiba, Japan, ⁴Eastern Chiba Medical Center, Chiba, Japan, ⁵Chiba Cancer Center, Chiba, Japan

The STIR Low-RFA PROPELLER method is a combination of STIR (Short-TI Inversion Recovery) suppressing fat signal homogenously and low refocus flip angle (Low-RFA) PROPELLER for flow signal reduction. Furthermore, the PROPELLER is able to reduce ghost generated by flow and motion, and to maintain high resolution by averaging of k-space. Consequently, the STIR Low-RFA PROPELLER method will be expected to produce clear brachial plexus imaging which is not affected by motion. In this study, we demonstrate that this new scheme (STIR Low-RFA PROPELLER) is superior to the conventional method (T2 weighted IDEAL) in the depiction of brachial plexus.

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