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Study of ulnar variance with high‐resolution MRI: Correlation with triangular fibrocartilage complex and cartilage of ulnar side of wrist
Author(s) -
Yoshioka Hiroshi,
Tanaka Toshikazu,
Ueno Teruko,
Carrino John A.,
Winalski Carl S.,
Aliabadi Piran,
Lang Philipp,
Weissman Barbara N.
Publication year - 2007
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.21084
Subject(s) - lunate , wrist , anatomy , fibrocartilage , medicine , intraclass correlation , ulna , cadaveric spasm , magnetic resonance imaging , nuclear medicine , articular cartilage , radiology , osteoarthritis , pathology , psychometrics , clinical psychology , alternative medicine
Purpose To investigate correlations with ulnar variance and the triangular fibrocartilage complex (TFCC) or cartilage of ulnar side of the wrist on high‐resolution MRI with a microscopy coil. Materials and Methods We reviewed ulnar variance, TFCC, and cartilage of the ulnar side of the wrist in 93 subjects (29 asymptomatic volunteers and 64 patients with suspected TFCC injury) with high‐resolution MRI using a 47‐mm microscopy surface coil. All MR images were obtained with a 1.5 T scanner. Coronal 2D gradient recalled echo T 2 *‐weighted images were used for analysis. For qualitative analysis we measured ulnar variance, TFCC angle, thickness in the central portion of TFCC disc proper, and cartilage thickness of the lunate and the ulnar head on MRI and calculated the correlation coefficient between measured values. We also examined the relationship between ulnar variance and age or sex. Results High‐resolution MR images clearly demonstrated TFCC and cartilage of the wrist and ulnar variance. The mean ulnar variance on MRI was +0.26 mm (range, −4.59 to +3.71 mm). The mean TFCC angle and TFCC thickness were 23.9° (range, −4.6 to +54.1°) and 1.11 mm (range, 0.4 to 3.22 mm), respectively. Ulnar variance and TFCC angle were positively correlated ( r = 0.84), and ulnar variance and TFCC thickness were negatively correlated ( r = −0.71). However, ulnar variance and lunate or ulnar head cartilage thickness were not significantly correlated. Conclusion High‐resolution MRI with a microscopy coil is a useful tool for evaluating the relationship between ulnar variance and ulnar side structures. J. Magn. Reson. Imaging 2007;26:714–719. © 2007 Wiley‐Liss, Inc.