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Abstract #2826

Time-Resolved 4D MRA using TrueFISP Based Spin Tagging & Dynamic Golden Angle Radial Acquisition

Lirong Yan1, Jiangsheng Yu2, Yiqun Xue2, Rajesh Kumar3, Hee Kwon Song2, Danny J. J. Wang1

1Neurology, UCLA, Los Angeles, CA, United States; 2Radiology, University of Pennsylvania, Philadelphia, PA, United States; 3Neurobiology, UCLA, Los Angeles, CA, United States

Unenhanced time-resolved 4D dynamic MRA (dMRA) has been recently introduced by combining arterial spin tagging with a segmented multiphase TrueFISP readout. The present study explored the feasibility for applying dynamic radial sampling with golden angle view increment in a TrueFISP based spin tagging sequence to reduce the total scan time by nearly 10 fold. The reconstructed dMRA images demonstrated the dynamic filling of the Circle of Willis and main branches, albeit with a small degree of temporal smoothing.