Imperial College London
Alternate

DrSusannahClarke

Faculty of Medicine, Department of Surgery & Cancer

Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 3600sgc05

 
 
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Location

 

215Sir Michael Uren HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Clarke:2023:10.1177/09544119231153905,
author = {Clarke, SG and Logishetty, K and Halewood, C and Cobb, JP},
doi = {10.1177/09544119231153905},
journal = {Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine},
pages = {359--367},
title = {Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): a phantom study},
url = {http://dx.doi.org/10.1177/09544119231153905},
volume = {237},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Implant migration is a predictor of arthroplasty survivorship. It is crucial to monitor the migration of novel hip prostheses within premarket clinical investigations. RSA is the gold standard method, but requires calibrated radiographs using specialised equipment. A commercial computed tomography micromotion analysis solution is a promising alternative but is not yet available for use with monobloc ceramic implants. This study aimed to develop and validate a CT-based spatial analysis (CTSA) method for use with ceramic implants. A phantom study was undertaken to assess accuracy and precision. A ceramic hip resurfacing arthroplasty (HRA) and 20 tantalum beads were implanted into a synthetic hip model and mounted onto a 6-degree of freedom motion stage. The hip was repeatedly scanned with a low dose CT protocol, with imposed micromovements. Data were interrogated using a semiautomated technique. The effective radiation dose for each scan was estimated to be 0.25 mSv. For the head implant, precision ranged between 0.11 and 0.28 mm for translations and 0.34°-0.42° for rotations. For the cup implant, precision ranged between 0.08 and 0.11 mm and 0.19° and 0.42°. For the head, accuracy ranged between 0.04 and 0.18 mm for translations and 0.28°-0.46° for rotations. For the cup, accuracy ranged between 0.04 and 0.08 mm and 0.17° and 0.43°. This in vitro study demonstrates that low dose CTSA of a ceramic HRA is similar in accuracy to RSA. CT is ubiquitous, and this method may be an alternative to RSA to measure prosthesis migration.
AU  - Clarke,SG
AU  - Logishetty,K
AU  - Halewood,C
AU  - Cobb,JP
DO  - 10.1177/09544119231153905
EP  - 367
PY  - 2023///
SN  - 0954-4119
SP  - 359
TI  - Low dose CT-based spatial analysis (CTSA) to measure implant migration after ceramic hip resurfacing arthroplasty (HRA): a phantom study
T2  - Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine
UR  - http://dx.doi.org/10.1177/09544119231153905
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36772975
UR  - https://journals.sagepub.com/doi/10.1177/09544119231153905
UR  - http://hdl.handle.net/10044/1/103057
VL  - 237
ER  -
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