Intravascular photoacoustic and ultrasonic double-mode imaging endoscope device and imaging method thereof

Abstract

The invention discloses an intravascular photoacoustic and ultrasonic double-mode imaging endoscope device and an imaging method thereof. The device comprises a photoacoustic excitation light source generator, a micro photoacoustic and ultrasonic double-mode endoscope probe, an ultrasonic signal exciting and acquiring subassembly and a computer, wherein the micro photoacoustic and ultrasonic double-mode endoscope probe consists of an incident optical fiber, a hollow annular array ultrasonic detector, a coated conical surface high reflector, a tube shell and a PVC tube; the incident optical fiber is connected with the photoacoustic excitation light source generator and passes through the hollow annular array ultrasonic detector; the hollow annular array ultrasonic detector is connected with the ultrasonic signal exciting and acquiring subassembly through a coaxial data transmission line; the coated conical surface high reflector is fixed in the tube shell; and the tube shell is fixedly connected with the outlet of the optical fiber so that the output laser is reflected circularly on the coated conical surface outwards and matched with the hollow annular array ultrasonic detector. The device and the method can realize imaging of a photoacoustic and ultrasonic double-mode endoscope and can be applied to the photoacoustic and ultrasonic double-mode imaging in vessels or micro cavities.

Description

technical field [0001] The invention belongs to the non-destructive testing and measuring technology, and in particular relates to an endoscopic imaging device and an imaging method thereof which use photoacoustic ultrasonic dual-mode imaging technology for intravascular structure imaging. Background technique [0002] Endoscope is a multi-disciplinary and general-purpose tool. Its function is to probe into the depths of curved pipes, to observe parts that cannot be seen directly, to observe the internal space structure and state in a sealed cavity, and to realize long-distance Observation and operation. The currently commonly used optical endoscopes are mainly NDT instruments integrating light, machinery and electricity, which are divided into three series of products: the first category, rigid endoscope series; the second category, fiber endoscope series; the third category Three types, electronic video endoscope series. The working principle of the rigid endoscope serie...

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Problems solved by technology

The basic principles of the above three types of endoscopic technologies are to use optical scattering or reflection signals to obtain detection images. Due to the strong influence of medium scattering, there is a shortcoming of shallow penetration depth (~ mm level)

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