Characteristic-based CT image and ultrasonic image liver registration method

• Main Authors: HUANG PEILAN, OU RAN, LIU YUJIE, SONG PINCHAN, ZHANG WENHUI, JIANG XIAOLIAN, LIN ZHENYUAN, LI WEIKUN
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2023
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses a feature-based CT image and ultrasonic image liver registration method. The method comprises the following steps: firstly, preprocessing a CT image and extracting liver organ contour features from the CT image; acquiring an ultrasonic image and extracting liver organ contour features from the ultrasonic image; carrying out rapid rough matching on the CT image and the ultrasonic image according to the area characteristics of the liver organs, and screening out a plurality of candidate CT slices; and then the candidate CT slices and the ultrasound images are registered one by one to obtain a spatial transformation matrix, the candidate CT slices are transformed to an ultrasound image coordinate system, and the CT slices accurately matched with the two-dimensional ultrasound are obtained by calculating the image similarity between the transformed candidate CT slices and the two-dimensional ultrasound. According to the invention, the precision and efficiency of registration can be improve