Postoperative calculation of acetabular cup position using 2-D-3-D registration

被引:28
作者
Penney, Graeme P. [1 ]
Edwards, Philip J.
Hipwell, John H.
Slomczykowski, Mike
Revie, Ian
Hawkes, David J.
机构
[1] Kings Coll London, Div Imaging Sci, Guys Kings & St Thomas Sch Med, London SE1 3RB, England
[2] UCL, CMIC, London WC1E 6BT, England
[3] Univ London Imperial Coll Sci Technol & Med, Dept Surg Oncol & Technol, London SE1 3RB, England
[4] DePuy Int, I Orthopaed, Leeds LS11 0AE, W Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
cup anteversion; implant position; 2-D-3-D registration;
D O I
10.1109/TBME.2007.890737
中图分类号
R318 [生物医学工程];
学科分类号
0831 [生物医学工程];
摘要
A method to accurately measure the position and orientation of an acetabular cup implant from postoperative X-rays has been designed and validated. The method uses 2-D-3-D registration to align both the prosthesis and the preoperative computed tomography (CT) volume to the X-ray image. This allows the position of the implant to be calculated with respect to a CT-based surgical plan. Experiments have been carried out using ten sets of patient data. A conventional plain-film measurement technique was also investigated. A gold standard implant position and orientation was calculated using postoperative CT. Results show our method to be significantly more accurate than the plain-film method for calculating cup anteversion. Cup orientation and position could be measured to within a mean absolute error of 1.4 mm or degrees.
引用
收藏
页码:1342 / 1348
页数:7
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