MR images-Based Microwave Focusing for Thermal Therapy

Time‐reversal microwave focusing using multistatic data

“…When the received waves are time-reversed and retransmitted, they are focused on the target position. The received waves are obtained using the finite-difference time-domain (FDTD) method, and the magnitude and phase of the time-reversed wave are extracted as the focusing parameters [11][12][13][14]. However, when an FDTD-based TR focusing algorithm is used, reanalysis is necessary to obtain the focusing parameters if the focusing target position changes.…”

“…Treatments using microwaves have been widely investigated because of problems such as radiation exposure when radiation is used and bone impenetrability when ultrasound is used [1, 2]. Microwaves technique uses heat generated by transmitting microwaves from external transmitters outside the human body and focusing the microwave energy on the lesion [3–17]. Therefore, microwave focusing is important.…”

“…Microwaves technique uses heat generated by transmitting microwaves from external transmitters outside the human body and focusing the microwave energy on the lesion [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Therefore, microwave focusing is important.…”

“…However, the focusing parameter extraction algorithms based on optimization require considerable processing time. Another widely used estimation algorithm for focusing parameter extraction algorithm is the time-reversal (TR) focusing algorithm [7][8][9][10][11][12][13][14][15][16][17]. The principle of the TR focusing algorithm is that microwaves are transmitted from a virtual transmitter at the focusing target position to external receivers.…”