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Real-time acousto-optic imaging method and device based on acoustic lens and laminated reflective film inspection

A multi-layer reflection, photoacoustic imaging technology, applied in ultrasonic/acoustic/infrasonic diagnosis, sonic diagnosis, infrasonic diagnosis, etc., can solve the problem of long time required, inability to monitor tissue changes in real time, etc., and achieve non-destructive sensitivity. Effect

Inactive Publication Date: 2007-09-05
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

The above imaging methods all rely on algorithms to achieve image reconstruction, which has the advantage of avoiding the limitation of the acoustic diffraction effect, so high-resolution imaging can be achieved, but due to the need to scan the imaging object, it takes a long time, which cannot be monitored in real time organizational change

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  • Real-time acousto-optic imaging method and device based on acoustic lens and laminated reflective film inspection
  • Real-time acousto-optic imaging method and device based on acoustic lens and laminated reflective film inspection
  • Real-time acousto-optic imaging method and device based on acoustic lens and laminated reflective film inspection

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0039] Fig. 1 is the structural block diagram of device of the present invention, as seen from Fig. 1, device of the present invention mainly comprises transparent flexible rubber layer 3, optical fiber 4, acoustic lens 9, sound-transmitting opaque material 10, multilayer reflection film 11, CCD12, computer 13. Among them, transparent flexible rubber layer 3, optical fiber 4, acoustic lens 9, sound-transmitting and opaque material 10, multi-layer reflective film 11 and CCD 12 are relatively installed in a cylindrical aluminum cavity 1; optical fiber 4 is connected to the pulse through a connector 6 The laser 7 is connected to form a light source, and at the same time, another laser 8 and a reflector 14 form an illumination light source; an optical fiber holder made of agar i...

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Abstract

A real-time optico-acoustic imaging method based on acoustic lens and reflecting film detection is disclosed. The acoustic lens is used to generate the acoustic pressure distribution of biologic tissue duto optico-acoustic effect and couple it to an imaging plane for directly imaging on it. A multi-layer reflecting film is used to convert said acoustic pressure distribution to light intensity distribution, which is recorded by CCD to obtain a clear image of a tissue layer. Its apparatus is composed of transparent flexible rubber layer, optical fiber, acoustic lens, two lasers, sound-transmission opaque material, multi-layer reflecting film, CCD, computer, and cylindrical cavity made of aluminum.

Description

technical field [0001] The invention relates to photoacoustic imaging technology, in particular to a real-time photoacoustic imaging method based on acoustic lens and multilayer reflective film detection. [0002] The invention also relates to devices used in said method. Background technique [0003] Optoacoustic tomography (Optoacoustic tomography) is an effective medical imaging technique for detecting light absorption distribution inside strongly scattering media (such as biological tissue), which has the advantages of high contrast of optical imaging and high penetration of ultrasonic imaging. For example, when a short pulse laser (nanosecond level) is used to irradiate biological tissue, the biological tissue undergoes thermoelastic expansion due to the slight rise in the temperature of the absorbed light energy, generating ultrasound, and the ultrasonic signal is proportional to the light absorption of the biological tissue, so photoacoustic The signal carries the in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/00A61B8/00
Inventor 唐志列魏亚东刘海锋
Owner SOUTH CHINA NORMAL UNIVERSITY
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