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Validation of a digital image processing software package for the in vivo measurement of wear in cemented Charnley total hip arthroplasties

Lookup NU author(s): Dr Emma Ritchie


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Computer-generated images were used to assess image processing software employed in the radiographic evaluation of penetration in total hip replacement. The images were corrupted using Laplacian noise and smoothed to simulate different modulation transfer functions in a range associated with hospital digital radiographic systems. With no corruption, the penetration depth measurements were both precise and accurate. However, as the noise increased so did the inaccuracy and imprecision to levels that may make changes in the penetration observed clinically difficult to discern between follow-up assessments. Simulated rotation of the wire marker produced significant bias in the measured penetration depth. The use of these simulated radiographs allows the evaluation of the software used to process the digital images alone rather than the whole measurement system. © 2005 IPEM. Published by Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Kennard E, Wilcox RK, Hall RM

Publication type: Article

Publication status: Published

Journal: Medical Engineering and Physics

Year: 2006

Volume: 28

Issue: 4

Pages: 356-362

Print publication date: 01/05/2006

Online publication date: 24/08/2005

ISSN (print): 1350-4533

ISSN (electronic): 1873-4030

Publisher: Elsevier Ltd


DOI: 10.1016/j.medengphy.2005.06.007

PubMed id: 16122967


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