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Abstract #4094

Calibration-free Multidimensional Universal Refocusing Pulse Design for 3D Reduced Field-of-View Prostate Imaging

Jiayao Yang1, Jesus Ernesto Fajardo2, Jeffrey A. Fessler1,2,3, Vikas Gulani2, Jon-Fredrik Nielsen1,2,3, and Yun Jiang2,3
1Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, United States, 2Department of Radiology, University of Michigan, Ann Arbor, MI, United States, 3Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States

Synopsis

Keywords: RF Pulse Design & Fields, RF Pulse Design & Fields, Reduced FOV; 3D EPI;

Motivation: Universal pulses have been shown to be robust to B1+ inhomogeneity for brain imaging at 7T, without time-consuming online design. A similar approach may be useful for designing multidimensional RF pulses for the 3D prostate imaging at 3T.

Goal(s): To design a universal multidimensional refocusing pulse and demonstrate its potential use for reduced field-of-view imaging in the prostate.

Approach: A three-dimensional universal refocusing pulse was designed using 6 subjects and validated in 12 subjects and in vivo prostate imaging at 3T.

Results: The proposed 3D universal refocusing pulse achieved similar performance on seen and unseen subjects. We successfully acquired reduced field-of-view prostate images.

Impact: Our simulation and in vivo results demonstrated the potential to design one universal 3D refocusing pulses for most subjects in prostate imaging.

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Keywords