Method for positioning key features of a lens based on ocular B-mode ultrasound images

US11723630B2 · kind B2 · utility

Assignee

• Sichuan University · CN

Inventors

• Jiancheng Lv · Chengdu, CN
• Yong Wang · Xi'an, CN
• Yongsheng Sang · Chengdu, CN
• Dezhong Peng · Chengdu, CN
• Xi Peng · Piscataway, US
• Yanan Sun · Zhengzhou, CN
• Zhenan He · Chengdu, CN
• Qing Ye · Westborough, US
• Mao Cai Li · Chengdu, CN
• Quanhui Liu · Chengdu, CN

Key dates

• Filing date: Apr 9, 2021
• Grant date: Aug 15, 2023
• Expiry date: Oct 22, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H50/70
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for positioning key features of a lens based on ocular B-mode ultrasound images includes: acquiring and preprocessing the ocular B-mode ultrasound images to obtain a preprocessed B-mode ultrasound image, eyeball coordinates and lens coordinates; sending the preprocessed B-mode ultrasound image, the eyeball coordinates and the lens coordinates into a trained target detection network YOLOv3 to obtain eyeball position images and lens position images; substituting the eyeball position images and the lens position images into a trained feature extraction network group to obtain image features and feature coordinates corresponding to the eyeball position images and the lens position images, respectively; substituting the image features into a trained collaborative learning network to screen key image features; and marking a feature coordinate corresponding to the key image features on the ocular B-mode ultrasound images to complete positioning the key features of the lens.