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Abstract #1400

Utility of radial reformatted images created from 3T high-resolution 3D wrist MRI in evaluation of the radioulnar ligaments.

Taiki Nozaki1, Saya Horiuchi1,2,3, Akimoto Nimura3,4, Atsushi Tasaki5, Nobuto Kitamura5, Keiichi Akita3, Yasuyuki Kurihara1, and Hiroshi Yoshioka2

1Department of Radiology, St.Luke's International Hospital, Tokyo, Japan, 2Department of Radiological Sciences, University of California, Irvine, Irvine, CA, United States, 3Department of Clinical Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan, 4Department of Functional Joint Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan, 5Department of Orthopaedic Surgery, St.Luke's International Hospital, Toyo, Japan

The radioulnar ligament (RUL) has been thought as the major stabilizer of the distal radioulnar joint (DRUJ) under dynamic loading. A detailed depiction of the dorsal and palmar RULs on MRI is very important. However, identification of the RULs including their ulnar styloid attachment on MRI is very difficult on the routine coronal plane, due to not only their small size with complexity of structures but the partial volume effect. The purpose of this study was to investigate the value of radial-slice MPR images sourced from 3D isotropic high-resolution MR images for the depiction of the RULs.

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