Evaluation of CT scans and 3-D reformatted images for quantitative assessment of the hip.
Hip measurements using three-dimensional (3-D) images and computed tomography (CT) scans were evaluated. The 3-D measurements proved more accurate than CT measurements of femoral and acetabular anteversion. Additionally, accurate 3-D measurements (> 99%) of the femoral neck-shaft angle were provided. Acetabular anteversion determinations by CT scans were systematically decreased as pelvic flexion increased, whereas accuracy was > 96% with 3-D images. The 3-D software allows image rotation in all three reference planes, which minimizes positional errors. A case study is provided to exemplify the shortcomings of conventional imaging techniques and the utility of the quantitative 3-D protocol.
Abel
M F
MF
Department of Orthopaedics, Portsmouth Naval Hospital, Virginia.
Sutherland
D H
DH
Wenger
D R
DR
Mubarak
S J
SJ
D002102:Cadaver; D002648:Child; D005069:Evaluation Studies as Topic; D005269:Femur / Q000002:abnormalities / Q000000981:diagnostic imaging; D006621:Hip Joint / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D010384:Pelvic Bones / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*