Transducer array, and acoustic wave measurement apparatus

Abstract

The invnetion provides a transducer array, and an acoustic wave measurement apparatus. The transducer array including a support member, an inner surface of which is defined by a quadric surface of revolution formed by rotating an imaginary quadratic curve about an imaginary rotation axis, the inner surface provided with a plurality of openings, and a plurality of transducers including receiving surfaces having a substantially parallelogram shape so as to confirm with the openings. In the receiving surface, one vertex among four vertexes is proximate with the imaginary rotation axis than the other three vertexes.

Description

technical field [0001] The invention discloses a transducer array for measuring sound waves, in particular, it relates to a transducer array for measuring sound waves generated by photoacoustic effect. Background technique [0002] A photoacoustic tomography (PAT) diagnostic device utilizing the photoacoustic effect is known. In this device, an object is irradiated with illumination light (near-infrared light) from a Nd:YAG laser pulse light source, and during the irradiation, acoustic waves generated in the object by the photoacoustic effect are transduced by a two-dimensional or three-dimensional array Receiver (transducer array) to generate and display images. [0003] PCT Japanese Patent Translation with Publication No. 2001-507952 discloses such a photoacoustic measuring device: in order to increase the accuracy of separation and synthesis of the acoustic wave signals propagating from the object through each propagation path, the photoacoustic measuring device is equip...

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Problems solved by technology

[0006] When such a transducer having a receiving surface in the shape of a parallelogram is mounted on a transducer array, in a configuration in which one of the vertices defining the receiving surface and one of the vertices defining the adjacent receiving surface are adjacent to each other, the transducer The installation density of the device is reduced, and the resolution of the image is unfavorably limited

Furthermore, in configurations where one of the vertices defining the receiving surface and the side defining the adja

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