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Abstract #2433

Clinical Feasibility of Accelerated TOF MR Angiography with Sparse Undersampling and Iterative Reconstruction: Comparison with Conventional Parallel Imaging

Takayuki YAMAMOTO 1 , Koji FUJIMOTO 1 , Tomohisa OKADA 1 , Yasutaka FUSHIMI 1 , Akira YAMAMOTO 1 , Aurelien F. STALDER 2 , Yutaka NATSUAKI 3 , Michaela SCHMIDT 2 , and Kaori TOGASHI 1

1 Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Kyoto, Japan, 2 Siemens Healthcare, Erlangen, Germany, 3 Siemens Medical Solutions USA, Inc, Pennsylvania, United States

Due to the relatively lower CNR, application of sparse MRI techniques to non-contrast enhanced Time-of-Flight (TOF) MRA of the brain is still challenging and hence previous reports are limited. In this study, the sparse MRI technique to TOF-MRA (sparse TOF) and conventional parallel imaging (GRAPPA) was performed for 9 healthy volunteers at 3.0T MRI scanner. Two radiologists made a subjective assessment of overall impression and the visualization of distal segments of the arteries. The result indicates that sparse TOF-MRA achieved higher acceleration while maintaining visual quality and can thus be used in a clinical setting.

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