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Abstract #4221

UTE T2* decay analysis of the rabbit supraspinatus tendon at 7T

Gerd Melkus 1,2 , Greg O Cron 1,2 , Peder E Larson 3 , Adnan Sheikh 1,2 , Ian Cameron 1,2 , Hakim Louati 4,5 , Peter Lapner 5 , Tim Ramsay 6 , and Guy Trudel 4,7

1 Department of Medical Imaging, The Ottawa Hospital, Ottawa, ON, Canada, 2 Department of Radiology, University of Ottawa, Ottawa, ON, Canada, 3 Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, United States, 4 Bone and Joint Laboratory, University of Ottawa, Ottawa, ON, Canada, 5 Division of Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada, 6 Ottawa Hospital Research Institute, The Ottawa Hospital, Ottawa, ON, Canada, 7 Department of Medicine, University of Ottawa, ON, Canada

A 3D ultra-short echo time (UTE) sequence was applied to study the T2* decay of the rabbit supraspinatus tendon at 7T. Twelve echoes with echo times ranging from 0.09ms to 10ms were acquired and four different decay models (mono- and bi-exponential) were applied to fit the T2* decay. Two ROIs were chosen for their importance in supraspinatus tendon surgical repair to estimate T2*. The study demonstrated that T2* of the rabbit tendon can be quantified using 3D UTE imaging and that a 3-parameter mono-exponential signal decay model shows the best fit results for the tendon T2* decay.

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