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Abstract #2070

Non-triggered, Non-Contrast-Enhanced Lower Extremity MR Angiography using Artery-Weighted REACT

Hiroshi Hamano1, Masami Yoneyama1, Yasutomo Katsumata2, Ryuji Baba3, and Kenji Iinuma1

1Philips Japan, Tokyo, Japan, 2Philips Healthcare, Tokyo, Japan, 3Sasebo Chuo Hospital, Nagasaki, Japan

Non-contrast enhanced lower extremity MR angiography, such as TOF, PC and TRANCE, is commonly used to diagnose peripheral arterial disease, but these techniques are occasionally unstable due to presence of arrhythmia, atrial fibrillation or tachycardia. Relaxation-Enhanced MR Angiography without Contrast and Triggering (REACT) derives high intravascular signal from T2prep pulse followed by STIR pulse and dual-echo gradient echo DIXON readout. However conventional REACT cannot distinguish arterial and venous signals clearly. We validate optimum T2prep time and TFE factor to improve the contrast between artery and vein. We demonstrate that REACT-Art provided more artery-dominant contrast compared to conventional REACT.

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