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Abstract #4840

Intrinsically Registered Fat Saturated and Unsaturated T2W Images Using a Keyhole Method

Steven Jackson1,2, Hanna Hanson2, David Cobben2, Kathryn Banfill2, Ahmed Salem2, Lisa McDaid1, Marcel van Herk2, and Benjamin Rowland2
1The Christie NHS Foundation Trust, Manchester, United Kingdom, 2Division of Cancer Sciences, The University of Manchester, Manchester, United Kingdom

Fat saturated and unsaturated T2W images of the same anatomy are required for MRI lung radiotherapy treatment planning. A prospective 'keyhole' pulse sequence that produces both image contrasts at full resolution via acquisition of a subset of FS k-space substituted into the non FS k-space was simulated. Simulated FS images with 50% of FS k-space substituted in a cross hair pattern were found to be only slightly inferior to acquired FS images by four clinicians based on scoring for delineation suitability. The prospective pulse sequence would save MR protocol time and improve the patient experience.

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