title: Measurement of hip prostheses using image analysis. The maxima hip technique.
abstract: A computer-based image analysis system has been developed as a research tool in total hip replacement. The system has been programmed to take multiple measurements from coronal plane radiographs. Poor quality radiographic images can be enhanced and standardised. The measurements which can be obtained include stem subsidence, cup migration, cup wear, and stem loosening. Reproducibility and accuracy were +/- 0.01 mm and +/- 0.5 mm respectively. The present application is in retrospective research, but prospective monitoring of radiographs is planned.
authors.affiliation: Centre for Hip Surgery, Wrightington Hospital, Wigan, Lancashire, England.
authors.forename: K
authors.initials: K
authors.lastname: Hardinge
authors.forename: M L
authors.initials: ML
authors.lastname: Porter
authors.forename: P R
authors.initials: PR
authors.lastname: Jones
authors.forename: D W
authors.initials: DW
authors.lastname: Hukins
authors.forename: C J
authors.initials: CJ
authors.lastname: Taylor
mesh_terms: D006621:Hip Joint / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008838:Microcomputers; D016348:Osseointegration; D011475:Prosthesis Failure; D011859:Radiography; D015203:Reproducibility of Results; D012189:Retrospective Studies