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Abstract #3357

Optimal k-space under sampling parttern in iterative recounstruction for radial fast spin echo MRI based on point spread function evaluation

Suguru Yokosawa1, Kuniharu Oka1, Toru Shirai1, and Yoshihisa Soutome1
1Medical System Research & Development Center, FUJIFILM Corporation, Tokyo, Japan

Synopsis

Keywords: Data Acquisition, Acquisition Methods

Motivation: Radial FSE MRI is valued for motion insensitivity but requires longer acquisition times due to overlapping central k-space sampling. Optimal k-space sampling patterns for radial FSE are yet to be fully explored.

Goal(s): To propose an optimal k-space sampling pattern based on PSF evaluation to improve image quality for radial FSE MRI.

Approach: Simulate an radial FSE sequence, optimizing the sampling pattern by minimizing PSF differences, and evaluating image quality via NMSE against a conventional reference.

Results: The proposed sampling pattern suppressed artifacts better, reducing NMSE from 0.00174 to 0.000845, with increased sampling density near the blade center and a narrower blade width.

Impact: Improving acquisition speed in radial fast spin echo MRI with optimized k-space under sampling pattern and iterative reconstruction may enhance examination throughput and reduce patient burden while maintaining or enhancing image quality.

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Keywords