Correlation of the cross-over ratio of the cross-over sign on conventional pelvic radiographs with computed tomography retroversion measurements

Objective To find a correlation between the cross-over ratio of the cross-over sign on conventional anteroposterior (AP) pelvic radiographs and retroversion measurements (‘roof-edge angle’ and ‘equatorial-edge angle) on computed tomography (CT) scans. This would facilitate the interpretation of the...

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Bibliographic Details
Published in:Skeletal radiology 2010-07, Vol.39 (7), p.655-660
Main Authors: Werner, Clément M. L., Copeland, Carol E., Stromberg, Jeff, Ruckstuhl, Thomas
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Algorithms
Biological and medical sciences
CT imaging
Female
Humans
Imaging
Investigative techniques, diagnostic techniques (general aspects)
Male
Medical sciences
Medicine
Medicine & Public Health
Middle Aged
Nuclear Medicine
Orthopedics
Osteoarticular system. Muscles
Pathology
Pelvis - diagnostic imaging
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Radiology
Reproducibility of Results
Scientific Article
Sensitivity and Specificity
Statistics as Topic
Tomography, X-Ray Computed - methods
Young Adult
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Summary:Objective To find a correlation between the cross-over ratio of the cross-over sign on conventional anteroposterior (AP) pelvic radiographs and retroversion measurements (‘roof-edge angle’ and ‘equatorial-edge angle) on computed tomography (CT) scans. This would facilitate the interpretation of the cross-over sign regarding the amount of acetabular retroversion. Materials and methods Correctly projected AP pelvic radiographs (2,925 hips) were examined for the presence of the cross-over sign (COS), and the overlap ratio of the COS was measured. On CT scans of the same patients the ‘roof-edge angle’ (RE angle) and the ‘equatorial-edge angle’ (EE angle) were also calculated. Results A statistically significant but only weak relationship could be found between the overlap ratio of the COS and the ‘roof-edge angle’ ( P  
ISSN:0364-2348
1432-2161
DOI:10.1007/s00256-009-0854-z