公开(公告)号：US20180168552A1

公开(公告)日：2018-06-21

申请号：US15562202

申请日：2016-03-31

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： William SHI ,  Ajay ANAND ,  Sheng-Wen HUANG ,  Shriram SETHURAMAN ,  Hua XIE

IPC: A61B8/08 ,  A61B18/14 ,  A61N7/02 ,  A61B8/00

CPC classification number: A61B8/485 ,  A61B8/085 ,  A61B8/5223 ,  A61B8/587 ,  A61B18/12 ,  A61B18/1477 ,  A61B2017/00106 ,  A61B2018/00577 ,  A61B2018/0212 ,  A61B2018/1869 ,  A61N7/02 ,  A61N2007/0052

Abstract: A medium of interest is interrogated according to ultrasound elastography imaging. A preliminary elasticity-spatial-map is formed. This map is calibrated against a reference elasticity-spatial-map that comprises an array (232) of different (240) elasticity values. The reference map is formed to be reflective of ultrasonic shear wave imaging of a reference medium. The reference medium is not, nor located at, the medium of interest, and may be homogeneous. Shear waves that are propagating in a medium are tracked by interrogating the medium. From tracking locations on opposite sides of an ablated-tissue border, propagation delay of a shear wave in the medium and of another shear wave are measured. The two shear waves result from respectively different pushes (128) that are separately issued. A processor decides, based on a function of the two delays, that the border crosses between the two locations. The calibrated map is dynamically updated and may include post-ablation border expansion (346) and time-annotated previous stages (344, 348).