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Abstract #1416

Accuracy of MRI-based measurements of aponeurosis dimensions

Lachlan Bird1,2, Arkiev D'Souza1,3, Iain Ball4, Caroline Rae1,3, Robert Herbert1,3, and Bart Bolsterlee1,3

1Neuroscience Research Australia, Randwick, Australia, 2Sydney University, Camperdown, Australia, 3University of New South Wales, Kensington, Australia, 4Philips Electronics Australia, Sydney, Australia

Aponeuroses are the thin, sheet-like tendons that cover substantial parts of muscles. We validated measurements of the dimensions of aponeuroses from T1, mDixon and ultrashort echo time (UTE) scans by comparing to direct measurements from dissection and digitisation. We used sequences that are feasible for human studies. Aponeurosis widths and lengths, measured on 20 lamb muscles, were substantially underestimated from mDixon scans. More accurate measurements were obtained from T1 and UTE scans, which had root mean square errors of 8-10% and 5-13% of the aponeurosis width and length, respectively, and did not systematically underestimate or overestimate aponeurosis width or length.

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