Thz Image reconstruciton example using Phase and amplitude Data of an image

Hi everyone, I need to use the Phase shift migration algorithm to reconstruct the Terahertz image from the phase and amplitude data. Is there any example available for how to start it? I need the basic concept. Is there any database available to get any sample data of THz images for this purpose? It will be a great help if any example of the Matlab program is provided. Thanks in advance.