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Abstract #0876

PETRA qMRA: Towards Zero-Flow Dephasing Intracranial Non-Contrast MR Angiography

Yutaka Natsuaki 1 , Xiaoming Bi 1 , David M Grodzki 2 , Aurelien F Stalder 2 , and Gerhard Laub 1

1 Siemens Healthcare, Los Angeles, CA, United States, 2 Siemens Healthcare, Erlangen, Germany

Despite being accepted as a current clinical gold standard for the intracranial non-contrast MR Angiography (MRA), 3D Time of Flight (3D TOF) sequence has well-known flow dephasing artifacts in lumen, in particular in the tortuous carotid arteries. Recently developed Zero-TE (ZTE) sequences (e.g. PETRA) and their subtraction-based MRA applications (e.g. PETRA qMRA) can potentially solve this problem, as they are inherently immune to flow dephasing. Through volunteer validation studies vs the 3D TOF (n=5), the current work demonstrates that the optimized PETRA qMRA can generate the one of the kind, zero-flow dephasing non-contrast MRA.

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