Rotary type optical-acoustic combined imaging probe and conduit

Abstract

The invention provides a novel high-rate rotary optical-acoustic combined imaging probe and a conduit. The probe comprises a photoconduction optical fiber, a GRIN lens, a sound generation signal lead, an electroacoustic transducer, a micromotor driving lead, a micromotor and a reflector. A detection acoustic beam produced by the electroacoustic transducer in the probe and a detection light beam produced by the optical fiber and the GRIN lens are spread to a far-end along an axial direction, then are reflected by the reflector, then are spread along a radial direction and irradiate a sample to be detected. The micromotor is used for rotating the reflector thereby changing directions of the detection acoustic beam and light beam. Through combination with probe axial motion, optical-acoustic spiral scanning imaging is realized. The imaging conduit is prepared from the probe as a core and the probe can move in an outer sheath and can be protected. The novel rotary type optical-acoustic combined imaging probe improves an optical-acoustic combined imaging rate and improves image quality.

Description

technical field [0001] The invention relates to the technical field of optical and acoustic imaging, in particular to a rotary combined optical and acoustic imaging probe and catheter. Background technique [0002] Optical imaging technology has a long history, but in recent years, due to the development of laser technology, rotary scanning optical imaging has been greatly developed. , to obtain the two-dimensional image of the surface of the object or the three-dimensional image of the object by means of helical scanning. This technique is particularly suitable for imaging tubular structures, and its representative techniques include laser scanning microscopy, low-coherence imaging, infrared spectroscopy and fluorescence imaging. Because of the short wavelength of light, these techniques can achieve very high resolution (~10 microns), among which low-coherence imaging has certain penetration and can perform subcutaneous detection, while infrared spectroscopy and fluoresc...

AI Technical Summary

Problems solved by technology

However, in actual use, the angular velocity of the far-end rotation often fluctuates, resulting in fluctuations in the scanning angular velocity of the beam or acoustic beam, resulting in non-uniform rotational distortion in the image and reducing image quality

In addition, due to the limitation of mechanical structure and material strength, the rotation speed of the torque cable is also limited

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