Photoacoustic and ultrasonic dual-mode endoscopic imaging device and method based on light reflection

Abstract

The invention relates to a photoacoustic and ultrasonic bimodal endoscopic imaging device and method based on light reflection, wherein the device comprises a probe housing provided with a transmitting and receiving surface; at least one group of a light transmitting module and a light reflecting module disposed outside the probe housing, with the light transmitting module being arranged on the transmitting and receiving surface, the light reflecting module reflecting the light beam to the light transmitting module, and the light transmitting module shaping the light beam and sending the lightbeam to the outside; and an ultrasonic phased array transmitting and receiving module located in the probe housing and one side is arranged on the transmitting and receiving surface for transmittingultrasonic signals and receiving ultrasonic signals and photoacoustic signals. Compared with the prior art, the device and method achieve simultaneous detection of photoacoustic and ultrasonic signalsby combining a laser module and a multi-channel ultrasonic probe, and simultaneously obtains ultrasonic and photoacoustic information of the same scanning plane by adopting the same probe device fordetection.

Description

technical field [0001] The invention relates to the field of endoscopes and non-destructive testing, in particular to a photoacoustic and ultrasonic dual-mode endoscopic imaging device and method based on light reflection. Background technique [0002] Ultrasound imaging for medical diagnosis is widely used in medical diagnosis due to its advantages of non-ionizing radiation, high-resolution imaging of anatomical structures, and low cost. However, ultrasound imaging is generally sensitive to tissue structures and blood flow with differences in acoustic impedance, and is not specific to other physical and chemical properties of tissues, so the diagnostic function is limited. In many medical clinical diagnoses, ultrasound imaging needs to be combined with other radiological diagnostic methods such as MRI, CT or X-ray to provide doctors with more specific lesion information. [0003] Photoacoustic imaging is a medical imaging method newly developed in recent years, which can r...

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Problems solved by technology

[0006] For example, Chinese patent CN 107638168A discloses an endoscope for photoacoustic detection of intestinal tissue. The disadvantage of this device is that it can only perform photoacoustic imaging on intestinal tissue and lacks physical information of the tissue; developed an endoscope for ultrasonic-photoacoustic detection of the inside of blood vessels. However, the disadvantage of this device is that it belongs to destructive detection and can only collect single-point signals. To obtain two-dimensional tissue information, it is necessary to rotate multiple points. Collecting signals and synthesizing images greatly reduces the rate of real-time imaging of two-dimensional tissue planes

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