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September 17, 2025

Field Strength Dependency of Geometric Distortion in Diffusion-Weighted single-shot EPI: Comparing 0.6 T and 1.5 T Scanners

Puntos clave

ss-EPI DWI at 0.6T showed significant reductions in geometric distortions, improving anatomical detail across multiple anatomies.
Geometric distortion was notably less at 0.6T compared to 1.5T, particularly near air-tissue interfaces.
Comparative imaging studies involved six volunteers scanned on a prototype 0.6T system against a 1.5T MRI scanner.
This approach may enhance diagnostic accuracy and patient comfort while supporting broader adoption of midfield MRI.

Resumen

Motivation: Diffusion-weighted imaging using single-shot EPI (ss-EPI) often suffers from susceptibility-induced distortions, increasing at higher field strengths. This study explores the benefits of 0.6T MRI in minimizing these distortions. Goal(s): To validate ss-EPI DWI at 0.6T in reducing geometric distortions in prostate, abdomen, lower back, and brain, comparing with 1.5T in selected anatomies. Approach: Six volunteers were scanned on a prototype 0.6T system to assess geometric distortion in ss-EPI DWI, with comparative imaging at 1.5T in brain and lower back. Results: At 0.6T, ss-EPI DWI showed reduced distortions around air-tissue interfaces across anatomies, with improved anatomical detail. Impact: 0.6T ss-EPI DWI offers distortion-free imaging in anatomies prone to artifacts at higher fields, such as the prostate, brain, and spine. This approach could enhance diagnostic accuracy, improve patient comfort, and support broader clinical adoption of midfield MRI.

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Cite This Study

Dong et al. (Tue,) studied this question.

synapsesocial.com/papers/68d4597031b076d99fa5c6d5 https://doi.org/https://doi.org/10.58530/2025/1648

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