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Abstract #1821

Pointwise Encoding Time Reduction with Radial Acquisition in Subtraction-Based MRA: Assessing Intracranial Saccular Aneurysms

Qing Fu1, Xiao-yong Zhang2, Ding-xi Liu1, and Xian-bo Deng1
1Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China, 2MR Collaborations, Siemens Healthcare Ltd., Shenzhen, China

This study compared the clinical utility of the pointwise encoding time reduction with radial acquisition (PETRA) sequence in subtraction-based magnetic resonance angiography (MRA) with conventional time-of-flight MRA (TOF-MRA) for evaluating intracranial saccular aneurysms. The results showed no substantial differences between PETRA-MRA and TOF-MRA in detecting, localizing, and determining the size of aneurysms. Furthermore, PETRA-MRA produced better image quality and provided a higher correlation with computed tomography angiography (CTA) in assessing morphologic parameters of aneurysms than TOF-MRA.

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