Detecting device integrated with light sound ultrasonic excitation and sensor

Abstract

The invention provides an optical acoustic ultrasound excitation and induction integrated detection device. An acoustic insulating layer, a sound absorption pad, a miniaturized semiconductor laser tube, a Fourier lens, a cylinder lens, a protection film and an annular multi-ring array sensor are all arranged in casing of the detection device and at same axle wire to form an integrated coaxial confocal structure. The multi-ring array sensor can generate ultrasonic signal, receive ultrasonic echo signal and receive optical acoustic signal by time-sharing excitation to realize optical acoustic ultrasound single or combined detection of A-type dynamic scan. The detection device has advantages of integrating excitation and induction of optical acoustic ultrasound, greatly increasing excitation and induction efficiency optical acoustic ultrasound, effectively reducing laser energy demand, increasing detection depth, and having high measurement sensitivity, simple operation and low cost. The detection device can be widely applied in fields of blood oxygen detection, blood sugar detection, HIFU therapy and effect monitoring, industrial crack detection and so on.

Description

technical field [0001] The invention relates to the technical fields of biomedical measurement and medical equipment, in particular to a photoacoustic ultrasonic excitation and sensing integrated detection device. Background technique [0002] At present, there are still many difficulties in the multi-parameter joint detection of photoacoustic ultrasound. For example, considering the damage threshold of biological tissues, the incident laser light cannot be too strong, and due to the strong scattering and absorption of light on the surface of the tissue, the light intensity reaching the deep tissue is weakened. Therefore, it is an urgent problem to be solved to effectively improve the excitation efficiency of photoacoustics; in addition, photoacoustic detection is based on the photoacoustic effect and ultrasonic detection is based on the piezoelectric effect. It is necessary to integrate and miniaturize the two sets of systems with different principles. A certain difficulty....

AI Technical Summary

Problems solved by technology

However, the scope of application of the forward detection mode is narrower, and the above methods all use a linear array detector as the sensing part, and the detection method is B-scanning. The photoacoustic ultrasonic excitation and sensing cannot achieve a coaxial confocal structure. The efficiency of acoustic excitation and detection is not high, and a high-power solid-state laser is required to provide photoacoustic excitation energy. However, large-volume solid-state lasers cannot realize the integration and miniaturization of excitation and sensing, and the actual promotion and application prospects are greatly restricted. limit

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