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Abstract #5030

The spiral trajectory correction effect on arterial spin labeling acquired with high-slew-rate gradient on a compact 3T scanner

Daehun Kang1, Uten Yarach1, Myung-Ho In1, Erin M Gray1, Nolan K Meyer1, Joshua D Trzasko1, Yunhong Shu1, Matt A Bernstein1, and John Huston1

1Department of Radiology, Mayo Clinic, Rochester, MN, United States

Proper design of the arterial spin-labeled (ASL) readout trajectory can minimize signal loss, reduce artifacts, and consequently improve the quality of ASL-derived perfusion maps. High performance gradients can improve MR image quality in spiral acquisition to reduce susceptibility and off-resonance effect. However, the eddy current and the system delay can degrade image quality by causing image rotation and blurring effects. In this work, the image artifact was corrected with a truer trajectory measured by a dynamic field camera. The effects of the trajectory correction on ASL images are investigated on a low-cryogen, compact 3T MRI system.

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