Photoacoustic endoscope for high-precision three-dimensional scanning of front micro motor and imaging method

Abstract

The invention discloses a photoacoustic endoscope for high-precision three-dimensional scanning of a front micro motor and an imaging method. The endoscope comprises a probe shell, an optical reflecting prism, a micro motor, an ultrasonic transducer and an optical varifocus lens; the probe shell is provided with a micro motor placement cavity, an oil chamber and a containing cavity; the ultrasonictransducer is arranged in the middle of the probe to separate the oil chamber from the containing cavity; the optical varifocus lens is arranged at the end, close to the ultrasonic transducer, in theprobe containing cavity, the main part of the micro motor is fixed to a micro motor placement cavity in the top end in the probe, and a central metal shaft of the micro motor can move back and forthwhile rotating. The photoacoustic endoscope for the high-precision three-dimensional scanning of the front micro motor and the imaging method have the advantages that the scheme of only rotating and moving the reflecting prism and not rotating or moving other components is provided for photoacoustic endoscope three-dimensional imaging, thereby solving the problems of electromagnetic interference,precision and the like which are caused by a larger rotating motor and stepping motor; the scanning efficiency and precision are high, the range of single scanning is large, and multi-parameter physical information and multi-scale structure imaging of cavity tissue can be obtained.

Description

technical field

[0001] The invention belongs to the technical fields of photoacoustic endoscopic imaging and non-destructive testing, and relates to a photoacoustic endoscope and an imaging method for high-precision three-dimensional scanning with a front micro motor. Background technique

[0002] The commonly used endoscopes are mainly optical and ultrasonic. Taking living organisms as the subject as an example, optical endoscopes can only image the surface of the inner cavity of the subject, such as the detection of the digestive tract, and cannot conduct early detection of tissue abnormalities originating from deep layers. Ultrasonic endoscopes receive echo signals from various layers of tissue, and use the difference in acoustic impedance of the tissue to image. Ultrasonic endoscope can reflect the structural information of tissues, but the resolution of imaging is low, and the contrast of biological soft tissues is not high, especially the biomolecular information of t...

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