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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: 2009-06-03
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 described in further detail below in conjunction with the examples and drawings, but the implementation of the present invention is not limited thereto.

[0039] figure 1 It is the structural block diagram of the device of the present invention, by figure 1 It can be seen that the device of the present invention mainly includes a transparent flexible rubber layer 3, an optical fiber 4, an acoustic lens 9, an acoustically transparent and non-transparent material 10, a multilayer reflective film 11, a CCD 12, and a computer 13. Among them, the transparent flexible rubber layer 3, the optical fiber 4, the acoustic lens 9, the sound-transmitting and opaque material 10, the multilayer reflective film 11 and the CCD 12 are installed oppositely in a cylindrical aluminum cavity 1; the 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 1...

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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 the detection of acoustic lenses and multilayer reflective films. [0002] The invention also relates to the device used in the method. Background technique [0003] Optoacoustic tomography (Optoacoustic tomography) is an effective medical imaging technique to detect the internal light absorption distribution of strong scattering media (such as biological tissues). It has the advantages of high contrast of optical imaging and high penetration of ultrasound imaging. For example, using a short pulse laser (nanosecond level) to irradiate biological tissues, the biological tissues undergo thermoelastic expansion due to the slight increase in the temperature of the absorbed light energy, and generate ultrasound. The ultrasound signal is proportional to the light absorption of the biological tissues. Therefore, photoacoustic The signal car...

Claims

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Application Information

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Patent Type & Authority Patents(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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