Ultra-wideband Microwave-Induced Thermoacoustic Tomography of Human Tissues

An ultra-wideband (UWB) microwave-induced thermoacoustic tomography was investigated by using finite difference time domain (FDTD) method. Using UWB microwave signal can avoid the shortages which are induced by the incompatibility of the penetration depth and spatial resolution in biological tissue under a given microwave frequency in the thermoacoustic tomography. The preliminary experimental investigation was based on the slice of digital electromagnetic human body model. Experimental results suggested that ultra-wideband microwave was feasible and practical and could bring better imaging contrast and resolution with the proper penetration than single frequency.