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A New Promising Technique of 3D Isovoxel Imaging Using 3T MRI in the Wrist: Comparison with 3T MR Arthrography  

Lee, Guen-Young (Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine)
Kim, Baek-Hyun (Department of Radiology, Korea University Ansan Hospital, Korea University College of Medicine)
Park, Jong-Woong (Department of Orthopedic Surgery, Korea University Ansan Hospital, Korea University College of Medicine)
Publication Information
Journal of the Korean Society of Radiology / v.64, no.2, 2011 , pp. 185-190 More about this Journal
Abstract
Purpose: We wanted to evaluate the usefulness of 3D isovoxel MR imaging using 3T MRI in the wrist joint, as compared with 3T MR arthrography. Materials and Methods: A total of 33 patients underwent both MR arthrography and 3D isovoxel imaging of the wrist joints using 3T MR, including 11 patients with arthroscopic confirmation. 3D isovoxel MR imaging was performed using an intermediate-weighted fast spin echo coronal scan with a 0.4-mm slice thickness and the axial images were reconstructed with a 1-mm slice thickness. One radiologist evaluated for the presence of scapholunate or lunotriquetral ligament tear and she determined the grade of the triangular fibrocartilage complex tear and chondromalacia with its location. We compared the two examinations using kappa values. Results: The rates of detecting wrist injury were similar for both exams with substantial to almost perfect inter-examination agreement (kappa value = 0.864 for scapholunate ligament tear, 0.835 for lunotriquetral ligament tear, 0.799 for TFCC tear and 0.940 for chondromalacia). For the eleven cases that underwent arthroscopy, their results of 3D isovoxel MRI were also similar to that of MR arthrography. Conclusion: 3D isovoxel MR imaging is useful for the evaluation of the wrist joint.
Keywords
Wrist Joint; Three-dimensional imaging; Magnetic Resonance Imaging; Arthrography;
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