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Abstract #1943

Effects of High Field on Magnetization Prepared Angiography

Tessier A, Wilman A
University of Alberta

The effects of high-field on a magnetization prepared 3D MRA technique are investigated with numerical simulation and in normal volunteers at 4.7T. Results show that with the higher SNR and longer T1 relaxation times, the technique produces high quality MR angiograms of the intracranial arteries, despite the inherent B1 inhomogeneity due to the RF standing wave effect. The inversion recovery MRA sequence completely suppresses the background while providing sufficient blood in-flow time to achieve high blood-to-background contrast.