Abstract #1400

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

Taiki Nozaki¹, Saya Horiuchi^1,2,3, Akimoto Nimura^3,4, 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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