Patent ID: 9713460
Date: 2017-07-25
CPC Classifications: A61B,G06T

Claim:
1. An ultrasound system comprising: a storage that stores image data of a living body containing a target object, which is acquired before undergoing radiofrequency ablation (RFA); an ultrasound probe that transmits an ultrasound signal to the living body during the RFA and receives an ultrasound echo signal reflected from the living body to create a reception signal; an ultrasound data acquisitor configured to acquire ultrasound data by using the reception signal; a sensor configured to detect a three-dimensional (3D) position of the ultrasound probe and create a first 3D position information of the ultrasound probe; and a processor that produces a reference image which has a second 3D position information obtained based on a 3D position of a living body by using the image data and an ultrasound image by using the ultrasound data, performs image registration between the reference image and the ultrasound image based on the first 3D position information and the second 3D position information, compares the reference image and the ultrasound image that have undergone the image registration with each other, and produces change information indicative of a change in the target object, wherein the processor further produces a first change information about the target object comparing the reference image and a previous ultrasound image, produces a second change information about the target object comparing the reference image and a current ultrasound image, and compares the first change information with the second change information to determine that an error occurs in the current ultrasound image, and wherein the processor further detects a first size change in size of the target object in the reference image and in a previous ultrasound image, detects a second size change in size of the target object in the reference image and in a current ultrasound image, and compares the first size change with the second size change to determine that an error occurs in the current ultrasound image if a difference between the first and second size changes exceeds a preset threshold value and removes the current ultrasound image.