Endoscopic optical coherence tomographic imaging probe and imaging system thereof

Abstract

The present invention provides an endoscopic optical coherence tomographic imaging probe and an imaging system thereof. The endoscopic optical coherence tomographic imaging probe comprises a single mode optical fiber and a beam turning member. A reflective surface is arranged between the end of the single mode optical fiber and the beam turning member. The beam turning component comprises a beam turning surface, and the included angle of the beam turning surface or its cut surface and the axial line of the singlemode optical fiber is an acute angle.A small part of the light of the light beam emitted by the singlemode optical fiberis reflected bythe reflective surface and returns to the original path to form a reference light, most of the light of the light beam emitted by the singlemode optical fiberis reflected by the beam turning surface and cast onasample structure to be measured, and the signal light returned from the sample structure passes through the beam turning member, is coupled into the single mode optical fiber of the probe, and then merges with the reference light to form an interference light signal. With the above technical scheme, a reference arm shares the light path with a sample arm, and the entire light path system is simpler, more compact, and more reliable; and the quality and stability of images are improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an endoscopic optical coherence tomography probe and an imaging system thereof. Background technique [0002] Since the invention of OCT (optical coherencetomography, optical coherence tomography) by Fujimoto and David Huang of MIT in 1991, the application of OCT in the medical field has developed rapidly, and the application in the field of ophthalmology is the most mature. In addition, in the Department of Cardiology In the fields of respiratory, gastroenterology, and urology, endoscopic OCT has the characteristics of shallow detection depth but high resolution, and forms a complementary relationship with ultrasonic endoscopy (deep detection depth and low resolution). Especially in cardiology For cardiovascular examination, endoscopic cardiovascular OCT has mature instruments and many clinical application cases, which largely makes up for the inability of IVUS (intraven...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the high-speed rotation of the OCT probe and the reference arm remains stationary, the polarization states of the two paths of light cannot be kept consistent, resulting in fluctuations in the strength of the interference signal, which affects the final image quality

[0005] 2. Since the OCT probe is a one-time use consumable product, a new probe is used every time a patient is examined, and the length of each probe cannot be guaranteed to be strictly consistent during the probe manufacturing process, which requires adjustment every time it is used for a patient The reference arm is used to match the optical path of the two beams

The doctor's operation is complicated, and it also brings instability to the entire imaging system

[0006] 3. Since the light beam of the reference arm propagates in the air, and part of the beam of the sample arm (that is, the probe) completely propagates in the optical fiber, the dispersion of the two paths of light is inconsistent, which seriously degrades the image quality

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