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Abstract #0888

Elliptical shells: a fast single-shot 3D readout for Arterial Spin Labeling perfusion imaging

Joseph G. Woods1, Divya Bolar1, and Eric C. Wong1
1Department of Radiology, University of California San Diego, San Diego, CA, United States

Single shot 3D acquisitions are ideal for ASL because they provide insensitivity to motion and allow for effective background suppression. Current state of the art implementations use stack-of-spiral FSE based imaging for time efficiency and insensitivity to resonance offsets. We introduce here a further improvement in time efficiency by using spirals that are designed to approximate a spherically symmetrical variable density function. Spirals are constrained to elliptical shells, and are numerically optimized for time efficiency. An example trajectory is twice as fast as a cylindrical stack-of-spirals with similar density parameters (excluding refocusing time), and results in high quality ASL images.

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