3D ultrasonic imaging by NAPA-CT: on the image reconstruction area transmitting through layers of inhomogeneous media

摘要

This paper describes the method of reconstruction of distribution of scatterers at the hemi-spherical surface. First we show that the echoes are simultaneously received by the array due to Born approximation. Then we show the theory of image reconstruction at the hemi-spherical surface by Radon transform. We also calculate the echoes through the three layers of media with different sound velocity. As a result, the amplitude distribution is not significantly different, but the phase distribution is different as the difference of sound velocity is more.