Two-dimensional annular phased array ultrasonic transducer structure

Abstract

The invention discloses a two-dimensional annular phased array ultrasonic transducer structure for three-dimensional ultrasonic imaging. The transducer structurally comprises more than one array element ring which is annularly distributed in a concentric circle way, and each array element ring comprises more than two array elements, and the area of each array element is the same. According to the two-dimensional annular phased array ultrasonic transducer structure, the defect of signal to noise ratio caused by high technical process difficulty and small array element size of a two-dimensional area array transducer can be overcome, and the limit that a one-dimensional array and a phased array are in geometric focusing fixing, and a wave beam cannot be effectively narrowed can be overcome, so that the lateral resolution can be comprehensively improved, the signal to noise ratio can be effectively increased, and real-time three-dimensional ultrasonic imaging can be realized by electronic phased scanning.

Description

technical field [0001] The invention discloses a medical diagnostic ultrasound system, in particular to a two-dimensional annular phased array ultrasonic transducer structure for three-dimensional ultrasonic imaging. Background technique [0002] With the continuous development of ultrasonic imaging technology, more and more ultrasonic imaging systems are used in medical diagnosis, and the most common one is B-ultrasound. A common ultrasound imaging system includes an ultrasound transducer array, which is used to emit ultrasound beams, receive reflected ultrasound waves, perform beam synthesis, display processing, and obtain B-ultrasound images. [0003] At present, most of the ultrasonic transducers widely used in clinical practice are one-dimensional linear array or one-dimensional phased array ultrasonic transducers. Each array element is linearly arranged in one direction, and two-dimensional ultrasonic images are obtained by electronic or mechanical scanning. Pleas...

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Problems solved by technology

[0009] Aiming at the above-mentioned shortcomings of the two-dimensional area array elements in the medical diagnostic ultrasound system in the prior art, the wiring is difficult, the signal-to-noise ratio of the array elements is low, and the geometric focus of the one-dimensional line array is fixed, etc., the present invention provides a new two-dimensional array The annular phased array ultrasonic transducer structure divides the annular phased array radially at a certain angle to form a two-dimensional annular phased array, which not only retains the aperture of the one-dimensional annular phased array but can Adjustable, adjustable depth of field in the axial direction, and consistent lateral resolution of the focus area, and overcome the shortcomings of the one-dimensional annular phased array that cannot focus in the non-axial direction and obtain beam deflection. Compared with the two-dimensional rectangular array, The two-dimensional annular phased array ultrasonic transducer requires fewer array elements, and the array element area is larger, and the distance between the array elements is not limited. size limit for

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