Validation of scoring hip osteoarthritis with MRI (SHOMRI) scores using hip arthroscopy as a standard of reference

Abstract

Purpose To validate SHOMRI gradings in preoperative hip magnetic resonance imaging (MRI) with intra-arthroscopic evaluation of intraarticular hip abnormalities. Methods Preoperative non-arthrographic 3.0-T MRIs of 40 hips in 39 patients (1 patient with bilateral hip surgery) with femoroacetabular impingement (FAI) syndrome (mean age, 34.7 years ± 9.0; n = 16 females), refractory to conservative measures, that underwent hip arthroscopy were retrospectively assessed by two radiologists for chondrolabral abnormalities and compared with intra-arthroscopic findings as the standard of reference. Arthroscopically accessible regions were compared with the corresponding SHOMRI subregions and assessed for the presence and grade of cartilaginous pathologies in the acetabulum and femoral head. The acetabular labrum was assessed for the presence or absence of labral tears. For the statistical analysis sensitivity and specificity as well as intraclass correlation (ICC) for interobserver agreement were calculated. Results Regarding chondral abnormalities, 58.8% of the surgical cases showed chondral defects. SHOMRI scoring showed a sensitivity of 95.7% and specificity of 84.8% in detecting cartilage lesions. Moreover, all cases with fullthickness defects (n = 9) were identified correctly, and in n = 6 cases (out of n = 36 with partial-thickness defects) the defective cartilage was identified but the actual depth overestimated. Labral tears were present in all cases and the MR readers identified 92.5% correctly. ICC showed a good interobserver agreement with 86.3% (95% CI 80.0, 90.6%) Conclusion Using arthroscopic correlation, SHOMRI grading of the hip proves to be a reliable and precise method to assess chondrolabral hip joint abnormalities. Key Points • Assessment of hip abnormalities using MRI with surgical correlation.• Comparing surgery and MRI by creating a hybrid anatomic map that covers both modalities.• Non-arthrographic use of 3.0-T MRI provides detailed information on cartilage and labral abnormalities in hip joints.

Osteoarthritis year in review 2019: imaging

“…New semiquantitative scoring systems have recently been developed and validated for use in OA research studies to assess the severity of structural pathology in other joints. These include the Shoulder Osteoarthritis Severity Score (SOAS) for the shoulder joint 57 , Scoring Hip Osteoarthritis with Magnetic Resonance Imaging (SHOMRI) for the hip joint 58,59 , and Thumb Osteoarthritis MRI Score (TOMS) for the first carpometacarpal joint 60 . These new scoring systems have been shown to have high construct validity and high inter-observer agreement for assessing the severity of structural joint pathology on MRI.…”

MRI-based 3D models of the hip joint enables radiation-free computer-assisted planning of periacetabular osteotomy for treatment of hip dysplasia using deep learning for automatic segmentation

“…In contrast, previous studies showed, that CT-based 3D-models allow exact surgical planning [ 8 , 9 ] of hip arthroscopy [ [10] , [11] , [12] , [13] ] for FAI or periacetabular osteotomy [ 2 ] for DDH. But CT scans should not be used for young patients due to the radiation exposure [ 14 ], especially in patients of child-bearing age.…”

Patients with Symptomatic Hip Osteoarthritis Have Altered Kinematics during Stair Ambulation

“…Cartilage abnormalities were scored on a range from 0 to 2, where 0 represents no cartilage lesion, 1 a partial‐thickness cartilage lesion, and 2 a full thickness lesion. The SHOMRI method has been validated with arthroscopic findings and was found to be a reliable and valid method to assess cartilage abnormalities 20 …”