Keywords:
Arthritides, Arthrography, MR, Musculoskeletal joint
Authors:
F. Schmaranzer, M. Siegfried, T. D. Lerch, J. L. Cullmann, J. Heverhagen, K. A. Siebenrock, M. Tannast; Bern/CH
DOI:
10.26044/essr2019/P-0127
Methods and Materials
IRB-approved retrospective study.
The institutional database (2016-2018,
360 hips) was reviewed for patients with AVN and complete radiographs and direct,
traction MRA of the hip at 3T.
Thirty patients were included (mean age 31 ± 9 years,
60% female).
Hips were staged according to the ARCO classification (0,
I,
II): 30%,
57%,
13%.
Fourteen (47%) hips underwent joint preserving surgery (10 open,
4 arthroscopic).
Traction technique included weight-adapted traction (15-23 kg),
a supporting plate to avoid pelvic tilt.
Imaging protocol included coronal,
axial,
sagittal and radial 2D PD-w TSE sequences without fat saturation obtained under leg traction.
Location of necrosis and lesions was described circumferentially and allocated to the 4 joint quadrants.
We assessed (1) location of necrosis,
(2) location and pattern of femoral cartilage damage (normal/ delamination/ thinning/ defect) on traction MRA; (3) diagnostic accuracy of traction MRA to detect femoral cartilage lesions in the 14 patients (14 x 4= 56 quadrants) undergoing surgery.