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Abstract #0325

Geometric distortion due to B0 inhomogeneity in liver MR imaging under inhalation and exhalation breath-hold

Oi Lei Wong1, Jing Yuan1, Yihang Zhou1, Siu Ki Yu1, and Kin Yin Cheung1

1Medical Physics and Research Department, Hong Kong Sanatorium & Hosptial, Hong Kong, Hong Kong

Geometric accuracy is critical for radiotherapy and is one major concern in the application of MRI in radiotherapy. Since the geometric distortion and B0 inhomogeneity are related, we aim to evaluate the geometric distortion due to ΔB0 variation at inhalation and exhalation breath-hold. Based on our results, larger geometric distortion was noted during inhalation than exhalation.

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