title: Utility of four-dimensional analysis of the acetabular labrum applying motion-gated multislice computed tomography: comparison with arthroscopy and harris hip score.
abstract: To analyze the kinesis and morphology of the acetabular labrum (AL) noninvasively, we applied 4-dimensional arthrography with motion-gated multislice computed tomography and compared the results with arthroscopy and Harris hip score (HHS) in 49 symptomatic patients who performed reciprocating hip flexion-extension as we carried out mimic retrospective electrocardiogram-gating acquisition. The kinematics and morphology of AL were classified as stabilized, irregular, or eccentric motion patterns. Of the 9 subjects who had intact or frayed AL on arthroscopy, 7 had stabilized motion (average 50 HHS) and 2 had irregular (44 HHS) motion by CT arthroscopy. Of the 16 without adhesive AL on arthroscopy, 6 had irregular motion (48 HHS) and 4 had eccentric motion (58 HHS). We found that the 4-dimensional arthrography with motion-gated multislice computed tomography can reveal both kinetic and morphological changes of the AL, and facilitate further stratification in subjects with the American Academy of Orthopaedic Surgeons class 0, or 1 or without "detached" morphological findings by arthroscopy.
authors.affiliation: Department of Orthopaedic Surgery, Chiba University Graduate School of Medicine, Chiba, Japan. shnjksd@tc4.so-net.ne.jp
authors.forename: Shunji
authors.initials: S
authors.lastname: Kishida
authors.forename: Nobusada
authors.initials: N
authors.lastname: Funabashi
authors.forename: Yoshitada
authors.initials: Y
authors.lastname: Harada
authors.forename: Issei
authors.initials: I
authors.lastname: Komuro
authors.forename: Hideshige
authors.initials: H
authors.lastname: Moriya
mesh_terms: D000077:Acetabulum; D000293:Adolescent; D000328:Adult; D001182:Arthroscopy; D005260:Female; D006621:Hip Joint; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007592:Joint Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed / Q000379:methods