High-Power Phased-Array Transducer Module for the Construction of a System for the Treatment of Deep Vein Thrombosis

摘要: Blood clot can be disintegrated by high-intensity focused ultrasound alone through inertial cavitation. There are limitations in using single-element transducers for this purpose such as lack of steerability and control the focus terms shape location. Phased-array being able to rapidly scan over clots alleviate problem. A full 3-D beam achieved 2-D electronically steerable arrays. However, required high-pressure amplitude has not been possible with In work, a 64-element fully populated phased-array transducer module was designed fabricated deep vein thrombosis (DVT). Lateral coupling considered design decrease electrical impedance eliminate need matching circuit. PZT-4 thickness 0.35 mm, an element surface area $2.2\,\,\text {mm} \times {2.2}$ length 6 mm showed mean 60.4 ± 11.5 measured each facilitating effective electric power transfer from driving electronics. No breakdown observed when voltage increased gradually 180 3 Vpp. Operation at Vpp found safe 10,000 repetitions without reduction power, resulting average pressure 1.01 0.09 MPa 2 surface. These values indicate that array eight modules (80 $\text {40}$ mm) is reach needed DVT. Such arrays practical current technology.