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Abstract #5107

Validation study T2 and T1rho mapping of the ankle cartilage using healthy volunteers

Hon J. Yu1, Alex Luk1, Jimmy Ton1, Edward Kuoy1, Jeff Russell2, Kelli Sharp3, and Hiroshi Yoshioka1

1Radiological Sciences, University of California, Irvine, CA, United States, 2Science and Health in Artistic Performance, Ohio University, Athens, OH, 3Arts-Dance, University of California, Irvine, CA, United States

This study demonstrates feasibility in manual segmentation of talar dome using MRI of the ankle and provides a systematic approach in assessment of image-based segmentation utilizing purely geometrical attributes and subsequent validation of angle-dependent analysis of T2 and T1ρ mapping of the cartilage. The results clearly demonstrates the magic angle effect of the talar dome cartilage on T2 mapping and also the important fact that repeatability assessment of segmentation should be made using the geometrical attributes rather than the underlying segmentation-based quantity.

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