Linear Relationship between the Effective Radiation Area and Thermal Images on a Thermochromatic Test Body with 1-MHz Ultrasonic Transducers.

The performance of therapeutic ultrasonic (TUS) devices has a high degree of variability because of the fragility of the equipment (its transducer in particular) and its handling. These facts raise doubts about the effectiveness and safety of treatments employing such devices. Currently there is no simple way to adequately verify the performance of these devices.