Investigation on Resolution of Thermoacoustic Imaging Based on Compressive Sensing: A Simulation Study

Microwave-induced thermoacoustic imaging (MITAI) has witnessed tremendous development in the past three decades and numerous related applications have been explored. Compressive sensing (CS) based MITAI is a newly emerging modality that can greatly reduce the number of measurements for obtaining acceptable imaging quality. This work investigates spatial resolution of CS based MITAI by using realistic frequency response of two transducers. Simulation results show that a transducer working at a higher frequency is able to image an object with smaller features. This finding agrees with the established theory of MITAI. This work is useful for potential applications and further improvement of the CS based MITAI technique.