Abstract #3369

Turbo spin-echo based enhanced acceleration-selective arterial spin labeling (eAccASL) for the lower extremity MR angiography

Natsuo Konta^1,2, Shuhei Shibukawa³, Tomohiko Horie¹, Tetsu Niwa⁴, Makoto Obara⁵, Takashi Okazaki⁴, Yui Kawamura⁴, and Toshiaki Miyati²

¹Department of Radiology, Tokai University Hospital, Kanagawa, Japan, ²Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Ishikawa, Japan, ³Department of Radiological Technology, Juntendo University, Tokyo, Japan, ⁴Department of Diagnostic Radiology, Tokai University School of Medicine, Kanagawa, Japan, ⁵Philips Japan, Tokyo, Japan

Synopsis

Keywords: Vascular, Blood vessels

Motivation: The lower extremity MR angiography (MRA) without electrocardiography (ECG) or peripheral pulse unit (PPU) triggering and contrast enhancement is useful for diagnosing peripheral arterial disease (PAD), which can avoid synchronization failure and nephrogenic systemic fibrosis (NSF).

Goal(s): Our goal was to improve peripheral arterial depiction without ECG or PPU and contrast agent.

Approach: TSE-based enhanced acceleration-selective arterial spin labeling (eAccASL) (TSE-Acc) was compared with TFE-based eAccASL (TFE-Acc), and TRANCE as a reference standard by SIR, CNR, and visual inspection.

Results: CNR and arterial visibility score for TSE-Acc were higher than TFE-Acc, but no difference compared with TRANCE.

Impact: TSE-based enhanced acceleration-selective arterial spin labeling (eAccASL) can provide clear depiction of the peripheral arteries without ECG or PPU and contrast agent, providing sufficient diagnostic performance in PAD patients with arrhythmia and CKD.

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