Calibration of lesion boundary mapping based on ultrasonic elasticity

摘要

The medium of interest is interrogated according to ultrasound elastography imaging. A preliminary elastic space map is formed. The map is calibrated against a reference elastic space map having an array 232 of different elasticity values 240. The reference map is formed to reflect the ultrasonic shear wave imaging of the reference medium. The reference medium is not the medium of interest, is not located there, and is homogeneous. Shear waves that propagate through the medium are tracked by examining the medium. From the tracking location opposite the ablation tissue boundary, the propagation delay of shear waves and other shear waves in the media is measured. The two shear waves result from different pushes 128 that are delivered separately. The processor determines that the boundary crosses between the two locations based on a function of the two delays. The calibration map is dynamically updated and can have a post-ablation boundary extension 346 and time annotated fronts 344,348.