A NEW SYSTEM FOR FREEHAND ULTRASOUND TRACKING APPLICATION IN MULTIMODALITY IMAGE MATCHING

摘要

This paper describes a localization system composed of a stereovision system with two cameras and an ultrasound system. After calibration of 2 cameras, a mask of infra-red LEDs is mounted on the probe. A method for spatial and temporal calibration is presented and used to calibrate the ultrasound system. Position and orientation of each ultrasonic cross-section are precisely measured and a 3D localization is available from the US images with an accuracy of 0.4 mm. We present two clinical applications of the system which gave good results in each case.