Integral detecting device for light sound ultrasonic excitation and sensor
A detection device and ultrasonic technology, applied in the field of biomedical measurement and medical equipment, can solve the problem that the integration and miniaturization of excitation and sensing cannot be realized, the efficiency of photoacoustic excitation and detection is not high, and the application range of forward detection mode is narrow, etc. problems, to achieve the effect of reducing laser energy requirements, improving excitation and sensing efficiency, and low cost
Inactive Publication Date: 2009-12-23
刘国栋
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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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[0012] Embodiment: A photoacoustic ultrasonic excitation and sensing integrated detection device is provided with an acoustic insulating layer 9 at the top and middle of the housing 10, and a semiconductor laser tube 1 is provided at the top center of the acoustic insulating layer 9, and the acoustic insulating layer 9, a Fourier lens 2 is arranged below the semiconductor laser tube 1; a sound-absorbing pad 8 is provided at the bottom of the housing 10 and under the acoustic insulating layer 9, and in the center of the sound-absorbing pad 8, a Fourier lens 2 is located. The bottom of the cylindrical lens 3 is provided with a protective film 4; the hollow inner ring of the annular multi-ring array sensor 7 is set on the bottom of the cylindrical lens 3; the semiconductor laser tube 1, the Fourier lens 2 The centers of the cylindrical lens 3 and the multi-ring array sensor 7 are all located on the same central axis 6, and are integrally packaged in the housing 10 to form an integ...
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The invention is a photoacoustic ultrasonic excitation and sensing integrated detection device, which is equipped with an acoustic insulating layer, a sound-absorbing pad, a miniaturized semiconductor laser tube, a Fourier lens, a cylindrical lens, a protective film and a ring-shaped multiple Ring array sensors, they are all located on the same central axis, forming an integrated coaxial confocal structure; multi-ring array sensors can time-sharingly excite and generate ultrasonic signals, receive ultrasonic echo signals and receive photoacoustic signals, realizing A-type dynamic Scanning photoacoustic ultrasound for single or joint probing. The invention integrates the excitation and sensing of photoacoustic ultrasound, can greatly improve the excitation and sensing efficiency of photoacoustic ultrasound, effectively reduces the requirement of laser energy, improves the detection depth, has high measurement sensitivity, and makes the structure of the device miniaturized and Practical, easy to carry, easy to operate, and low cost. The invention can be widely used in the fields of blood oxygen detection, blood sugar detection, HIFU treatment and effect monitoring, industrial flaw detection and the like.
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....
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IPC IPC(8): A61B5/1455A61B8/14G01N21/00G01N29/04G01N29/34
Inventor 刘国栋曾吕明徐景坤
Owner 刘国栋