Validation of a standardized mapping system of the hip joint for radial MRA sequencing

Abstract

The established mapping system for radial sequences of hip joint MRA is reproducible and easy to perform.

Femoral osteochondroplasty can be performed effectively without the risk of avascular necrosis or femoral neck fractures in an experimental ovine FAI model

“…For hypothesis 3, CT scans which were acquired preoperatively (before FAI induction [¼first surgery] and femoral osteochondroplasty [¼second surgery]) and after the sacrifice (after FAI induction [¼first surgery] and femoral osteochondroplasty [¼second surgery]) were radially reformatted. Twelve radial images around the femoral neck axis 10 were used for circumferential measurements at each 'half-hour' position of the joint. The most prominent appearance of the greater trochanter served as landmark for the 12 o'clock position of the femur 10 .…”

“…Twelve radial images around the femoral neck axis 10 were used for circumferential measurements at each 'half-hour' position of the joint. The most prominent appearance of the greater trochanter served as landmark for the 12 o'clock position of the femur 10 . Two quantitative parameters were assessed: the alpha angle 15 and the resection depth 7 (Fig.…”

Intra-articular Lesions: Imaging and Surgical Correlation

“…Due to the different orientation of the acetabulum and the proximal femur, clock-face position typically differs by $ 1 hour position. 50 The acetabular teardrop corresponds to the 6/12 o'clock position for localization of acetabular lesions (►Fig. 13).…”

Conventional and Arthrographic Magnetic Resonance Techniques for Hip Evaluation: What the Radiologist Should Know

“…23). 125 We use this easy-to-apply method to describe the location of the cam deformity in clinical routine using 12 radial images. This results in half-hour intervals on the clock face per each slide gap.…”

“…23). 125 It is commonly accepted that measurement of femoral torsion should be part of every preoperative evaluation for reconstructive hip surgery. 67 Orthopaedic surgeons traditionally relied on axial CT images to measure femoral torsion.…”