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Photoacoustic endoscopic type A scanning imaging system

A technology of scanning imaging and light source, which is applied in the direction of material analysis, measuring devices, instruments, etc. through optical means, can solve problems such as inability to perform endoscopic imaging, improve excitation and sensing efficiency, improve operability and scope of application, The effect of improving the detection ability of the system

Inactive Publication Date: 2014-08-06
JIANGXI SCI & TECH NORMAL UNIV
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Problems solved by technology

However, the obvious defect of the above two methods is that the large forward area (that is, the tangential direction of the sensor) is an imaging blind area, which is only suitable for lateral fan-shaped endoscopic imaging of tubular objects under test, and cannot be realized in the forward depth direction. endoscopic imaging

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  • Photoacoustic endoscopic type A scanning imaging system
  • Photoacoustic endoscopic type A scanning imaging system
  • Photoacoustic endoscopic type A scanning imaging system

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Embodiment

[0024] Example: see figure 1 .

[0025] A photoacoustic endoscopic A-type scanning imaging system, comprising an excitation and sensing unit A, a control and processing unit B, the excitation and sensing unit A and the control and processing unit B are connected by cables, the excitation and The sensing unit A includes an endoscopic lens 1 and a cable 2, the endoscopic lens 1 is connected to the cable 2, and the cable 2 is connected to the control and processing unit B, and the endoscopic lens 1 includes a Optical fiber head 20, the outer side of described optical fiber head 20 is provided with convex lens 19, and the outer side of convex lens 19 is provided with light-transmitting protective film 18, is provided with fixing layer 15 on the periphery of described optical fiber head 20 and convex lens 19, on the light-transmitting protective film 18 is provided with a cMUT annular array sensor 7, between the cMUT annular array sensor 7 and the fixed layer 15 is a chip 13, the ...

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Abstract

The invention relates to the technical field of endoscopic imaging, and in particular relates to a photoacoustic endoscopic type A scanning imaging system. The system comprises an exciting and sensing unit A and a controlling and processing unit B which are connected with each other through a cable, wherein the exciting and sensing unit A comprises an endoscopic lens and a cable which are connected with each other; the cable is connected to the controlling and processing unit B. The system disclosed by the invention has the advantages that the cMUT technique is adopted, the processing size and the system size of a cMUT ring array sensor are respectively at micrometer magnitude and millimeter magnitude, high-density array is easy to form, the bandwidth is large, the electromechanical conversion efficiency is high, and the micromation and the practicability of the system structure are realized; cMUT array elements are arranged in a ring array structure, the photoacoustic type A detecting imaging of multiple sites in the front area of a central axis can be realized, each element can receive photoacoustic signals by selecting different numbers of vibration membranes so as to improve the system detectivity.

Description

technical field [0001] The invention relates to the technical field of endoscopic imaging, in particular to a photoacoustic endoscopic A-scan imaging system. Background technique [0002] Endoscopic imaging systems are mainly divided into industrial endoscopes and medical endoscopes, which can be divided into electronic endoscopes, optical endoscopes, ultrasonic endoscopes, etc. At present, optical and electronic endoscopes are widely used , especially the electronic endoscope, because its electronic technology is developing very fast, and its use is becoming more and more popular. For example: optical endoscope can directly reflect the optical scattering or reflection information of the absorber, but due to the attenuation of light by the medium, its penetration depth is only on the order of a shallow millimeter; ultrasonic endoscope reflects the acoustic impedance of the absorber Differential information has a penetration depth of centimeters, but its imaging contrast is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17A61B8/12
Inventor 曾吕明刘国栋
Owner JIANGXI SCI & TECH NORMAL UNIV
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