Real-time location of surgical incisions in cataract phacoemulsification
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Real-time location of surgical incisions in cataract phacoemulsification Junhua Chen 1 & Xingming Qi 1 & Wenxin Wang 1,2 & Bao Li 1 & Youjun Liu 1 Received: 24 December 2019 / Revised: 6 July 2020 / Accepted: 6 August 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract
Phacoemulsification is an important surgical treatment for cataracts. The location of the surgical incision affects the surgically induced astigmatism, and the typical surgical incision for phacoemulsification is located on the steepest meridian direction of the limbus. The real-time location of the surgical incision during the cataract phacoemulsification can reduce doctors’ workloads and the potential for human error. A real-time surgical incision location algorithm in microscopic images is proposed in this paper. It is a two-part algorithm that consists of an iris external boundary detection algorithm and a rotation angle calculation algorithm. The steps in the iris external boundary detection algorithm include image space conversion, image segmentation, filtering, and least square based circle detection. The eye rotation angle calculation algorithm utilizes the SURF algorithm. Experiments on six phacoemulsification videos show that the algorithm can locate surgical incisions in microscopic videos accurately and quickly. The distance error of the iris external boundary algorithm is 2.45 ± 0.136, and the area error is 2.69 ± 0.184. The average running time of this algorithm for one image is 65.1 ± 4.80 ms; a demonstration video, the S1 Video, is available. The algorithm proposed in this paper can determine the surgical incision location in cataract phacoemulsification in real-time based on a personal computer and can provide assistance for ophthalmology surgeons. Keywords Cataract phacoemulsification . Surgical incision . Computer-aidedlocation . Real-time
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11042-02009560-8) contains supplementary material, which is available to authorized users.
* Youjun Liu [email protected]
1
College of Life Science and Bioengineering, Beijing University of Technology, Beijing, People’s Republic of China
2
Neusoft Beijing R&D Center (Building 22), Zhongguancun Software Park 10, Xibeiwang East Road, Beijing, China
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1 Introduction Cataract is a worldwide severe eye-impairment disease, and the main features of this disease are progressive opacification of the lens, halos around light, blurry vision, and so on [16]. In developed countries (e.g., USA, UK) cataract is the second major disease causing blindness [23]. Cataract phacoemulsification is the main surgical method for the treatment of cataract. Especially for mature senile cataracts, it is almost the unique treatment method [35]. With the development of the phacoemulsification technology, corneal astigmatism has become one of the main factors affecting the visual quality of cataract surgery. Controlling corneal astigmatism before orthodontic s
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