Method and device for detecting displacement in elastography,申请号US201214126222-传众专利搜索

Method and device for detecting displacement in elastography

申请公布号：US9607405(B2)

申请号：US201214126222

申请日期：2012.03.27

申请公布日期：2017.03.28

申请人：

SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD.

发明人：Li Shuangshuang;Fan Rui

分类号：A61B8/08;G06T7/60;G01N29/06;G01S7/52;G06T7/00

主分类号：A61B8/08

代理机构：

Stoel Rives LLP

代理人：Christensen Kory D.;Stoel Rives LLP

地址：Shenzhen CN

摘要：Disclosed are a method and a device for detecting displacement in elastography. The method comprises: acquiring a target point, acquiring a cross-correlation phase calculation location of the target point in a second frame image; calculating a cross-correlation phase according to the cross-correlation phase calculation location; calculating a longitudinal displacement result according to the cross-correlation phase; and calculating a gradient of the displacement result to obtain a strain result. Through the elastography method and device, I/Q-channel echo baseband signals, obtained by downsampling, of two frames before and after compression are acquired, displace information between the two frames is rapidly detected by guiding phase estimation, and axial gradient calculation is performed to obtain strain information, which can not only obtain a strain image of high quality but also reduce the calculation amount, thereby satisfying the clinical real-time requirement.

主权项：1. A method for detecting displacement in elastography within an ultrasound imaging system, comprising: acquiring at least two successive frame images from ultrasound signals using an ultrasound probe; selecting a target point in a first frame image; obtaining a cross-correlation phase calculation location of the target point in a second frame image; calculating a cross-correlation phase based on the cross-correlation phase calculation location; and calculating a longitudinal displacement based on the cross-correlation phase; wherein the cross-correlation phase calculation location comprises a longitudinal location for cross-correlation phase calculation; and wherein obtaining a cross-correlation phase calculation location of the target point in a second frame image comprises: determining a longitudinal displacement of a previous calculation point of the target point;in the second frame image, searching a point which has maximum correlation with kernel data within a region which centers on a sum of location of the target point and the longitudinal displacement of the previous calculation point, wherein longitudinal location of the point which has maximum correlation with kernel data serves as the longitudinal location for the cross-correlation phase calculation of the target point in the second frame image.