Experimental Research on the Brush-Target Method and Calorimetry Method for Measurement of High-Intensity Focused Ultrasound Power

Aiming at solving the problem of easy damage to the conventional radiation balance method in high-intensity focusing field, a technique based on pulsed measurements was adopted which use the “brush” as absorbing target. The transducer was radiated by a definite duty factor, and the ultrasonic power can be obtained by measure the change of the target weight through the balance. The error of ultrasonic power is less than 7.8% by comparing with the calorimetric method of buoyancy change, which verifies the effectiveness of the brush-target method in measuring the HIFU power.