Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons
Purpose: There is a correlation between the centration and quality of the continuous circular capsulorhexis (CCC) and the subsequent refractive outcomes in cataract surgery. We developed a novel software evaluation tool based on video processing to assess the execution of CCC by comparing trainee an...
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sg-ntu-dr.10356-793282020-05-28T07:17:24Z Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons Laude, Augustinus Aniyath, Praseedha Krishnan Seow, Kiam Tian Kwok, Jian Wah Fam, Han Bor Heng, Wee Jin Rajan, Deepu School of Computer Engineering Investigative Ophthalmology & Visual Science Computer Science and Engineering Purpose: There is a correlation between the centration and quality of the continuous circular capsulorhexis (CCC) and the subsequent refractive outcomes in cataract surgery. We developed a novel software evaluation tool based on video processing to assess the execution of CCC by comparing trainee and specialist surgeons from a teaching hospital. The software incorporates a novel performance metric that quantifies their performance. Methods: We first detected the limbus of the eye in each video frame using Hough circle detection. Next, the capsulorhexis forceps is detected based on its linearity and specularity. Then a visual tool-tracking function is invoked based on an image similarity measure which is illumination invariant and computationally inexpensive. The number of capsular grasps is then found from a functional plot of distance between the pair of forceps tips. Other parameters computed include surgical efficiency with respect to surgical time, circularity index and absolute decentration of the CCC with respect to the optical centre. These parameters are integrated into a single novel performance metric for each surgery (Fig 1). Results: The software was implemented in MATLAB and we evaluated 35 capsulorhexis videos of surgeries done by 19 specialist and 16 trainee surgeons. The quantitative parameters for all videos are listed in Fig 2. A student t-test comparison of the mean performance metric scores found that the trainee group scored 0.4244 (±0.2) which was significantly lower than the specialist group which scored 0.8676 (±0.1) (P=0.0001), indicating that the two groups could be differentiated. Conclusions: We developed a tool for evaluation of the performance of capsulorhexis during cataract surgery. The proposed performance metric computed by the software could differentiate the two groups of surgeons. Using quantitative parameters, we can have an objective and repeatable way for surgical assessment to identify areas for improvement. Accepted version 2015-10-01T06:23:53Z 2019-12-06T13:22:41Z 2015-10-01T06:23:53Z 2019-12-06T13:22:41Z 2015 2015 Conference Paper Laude, A., Aniyath, P. K., Seow, K. T., Kwok, J. W., Fam, H. B., Heng, W. J., et al. (2015). Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons. Investigative Ophthalmology & Visual Science, 56(7), 132. https://hdl.handle.net/10356/79328 http://hdl.handle.net/10220/38761 http://iovs.arvojournals.org/article.aspx?articleid=2331014&resultClick=1 186427 en © 2015 Association for Research in Vision and Ophthalmology (ARVO). This is the author created version of a work that has been peer reviewed and accepted for publication by Investigative Ophthalmology & Visual Science, Association for Research in Vision and Ophthalmology (ARVO). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://iovs.arvojournals.org/article.aspx?articleid=2331014&resultClick=1]. application/pdf image/jpeg image/jpeg |
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Computer Science and Engineering Laude, Augustinus Aniyath, Praseedha Krishnan Seow, Kiam Tian Kwok, Jian Wah Fam, Han Bor Heng, Wee Jin Rajan, Deepu Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
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Purpose: There is a correlation between the centration and quality of the continuous circular capsulorhexis (CCC) and the subsequent refractive outcomes in cataract surgery. We developed a novel software evaluation tool based on video processing to assess the execution of CCC by comparing trainee and specialist surgeons from a teaching hospital. The software incorporates a novel performance metric that quantifies their performance. Methods: We first detected the limbus of the eye in each video frame using Hough circle detection. Next, the capsulorhexis forceps is detected based on its linearity and specularity. Then a visual tool-tracking function is invoked based on an image similarity measure which is illumination invariant and computationally inexpensive. The number of capsular grasps is then found from a functional plot of distance between the pair of forceps tips. Other parameters computed include surgical efficiency with respect to surgical time, circularity index and absolute decentration of the CCC with respect to the optical centre. These parameters are integrated into a single novel performance metric for each surgery (Fig 1). Results: The software was implemented in MATLAB and we evaluated 35 capsulorhexis videos of surgeries done by 19 specialist and 16 trainee surgeons. The quantitative parameters for all videos are listed in Fig 2. A student t-test comparison of the mean performance metric scores found that the trainee group scored 0.4244 (±0.2) which was significantly lower than the specialist group which scored 0.8676 (±0.1) (P=0.0001), indicating that the two groups could be differentiated. Conclusions: We developed a tool for evaluation of the performance of capsulorhexis during cataract surgery. The proposed performance metric computed by the software could differentiate the two groups of surgeons. Using quantitative parameters, we can have an objective and repeatable way for surgical assessment to identify areas for improvement. |
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School of Computer Engineering |
author_facet |
School of Computer Engineering Laude, Augustinus Aniyath, Praseedha Krishnan Seow, Kiam Tian Kwok, Jian Wah Fam, Han Bor Heng, Wee Jin Rajan, Deepu |
format |
Conference or Workshop Item |
author |
Laude, Augustinus Aniyath, Praseedha Krishnan Seow, Kiam Tian Kwok, Jian Wah Fam, Han Bor Heng, Wee Jin Rajan, Deepu |
author_sort |
Laude, Augustinus |
title |
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
title_short |
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
title_full |
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
title_fullStr |
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
title_full_unstemmed |
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
title_sort |
computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons |
publishDate |
2015 |
url |
https://hdl.handle.net/10356/79328 http://hdl.handle.net/10220/38761 http://iovs.arvojournals.org/article.aspx?articleid=2331014&resultClick=1 |
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1681057388086427648 |