Enhancement of photoacoustic tomography in the tissue with speed-of-sound variance using ultrasound computed tomography*
Cheng Ren-Xiang, Tao Chao, Liu Xiao-Jun
       
The effect of SOS difference Δ v on imaging quality. Here Δ v is defined as the speed difference between the high speed region and the surrounding tissue. The image quality is measured by the correlation coefficient.