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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