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- Title
Validation of CT image-based software for three-dimensional measurement of acetabular coverage profile.
- Authors
Wenzl, Marcus P.; Heller, Markus; Janz, Viktor; Perka, Carsten; Wassilew, Georgi I.
- Abstract
<bold>Background: </bold>Plain radiography, 2-dimensional (2D) magnetic resonance imaging (MRI), and computed tomography (CT) do not precisely display morphology and acetabular coverage in developmental dysplasia of the hip or pincer-type femoroacetabular impingement. Pelvic position and pelvic tilt affect assessment of the acetabular parameters, leading to misinterpretation.<bold>Objective: </bold>We tested a 3-dimensional (3D) CT evaluation script to calculate the crossover sign (COS), acetabular coverage and morphology.<bold>Methods: </bold>To test the method, we constructed a phantom pelvic model, in which the acetabulum was mounted at different coverages of the femoral head, and simulated a COS and the acetabular morphology. Additionally we examined the reliability and objectivity of this method in ten patients with CT scans of the pelvis for conditions unrelated to hip disorders.<bold>Results: </bold>We obtained an average accuracy of the 3D CT evaluation script of -0.37∘ (range -3.84 to 3.88; SD ± 1.43) for morphology, and 0.002% (range -7.28% to 6.90%; SD ± 1.60%) for coverage of the femoral head. Significant correlation between the expected and calculated COS (p= 0.01) was found.<bold>Conclusions: </bold>Our 3D CT evaluation script permits precise evaluation of the acetabular coverage profile, the presence or absence of a COS and acetabular morphology, independent of patient positioning or pelvic tilt.
- Subjects
ACETABULUM (Anatomy); DYSPLASIA; COMPUTED tomography; MAGNETIC resonance imaging; MEDICAL imaging systems; THREE-dimensional imaging; COMPUTER software; ANATOMY; PATIENTS
- Publication
Technology & Health Care, 2017, Vol 25, Issue 5, p989
- ISSN
0928-7329
- Publication type
journal article
- DOI
10.3233/THC-170932