What’s the electronic phased array focusing HIFU transducer

This type of transducer is a type of transducer that has been discussed in recent years. Its design is based on the Huygens principle. The transducer is arranged in an array in a space by a plurality of mutually independent piezoelectric wafers. Each wafer is called an array element. When each array element is excited by signals of the same frequency, the sound waves emitted by the transducers are Coherent, these sound waves form specific directivity or focusing characteristics after spatial interference. Phased array focusing can be divided into the following categories: linear array electronic focusing HIFU transducer treatment system using linear array transducer, mainly used to treat intracavitary diseases. Radiation scanning of human soft tissue can be performed by using a linear array transducer in combination with a mechanical moving device. There are two types of ring array electron focus ring array focus transducers, namely cylindrical ring array and ring array. The cylindrical ring array is a composite array consisting of a line array and a uniform arc. The cylindrical ring array can be scanned and controlled in one direction, and multiple focal points can be formed. The circular array HIFU ceramics transducer can be divided into two types, one is a planar ring array, and the other is a scheme combining geometric focal length and ring array phase-controlled focusing. The planar ring array has a poor focusing effect, and the concave spherical surface is focused. Compared to no significant improvement. Combining the geometric focal length with the phased phase focusing of the ring array is a commonly used design.

The HIFU phased array transducer of the focused ultrasonic transducer treatment system (FocusSurgery, Inc., Indianapolis, IN) is of this type and the focus ability of the array is qualitatively evaluated by schlieren imaging.