MLA-OCT (micro-lens array optical coherence tomography) imaging catheter, MLA-OCT imaging system and MLA-OCT imaging method

Abstract

The invention discloses an MLA-OCT (micro-lens array optical coherence tomography) imaging catheter, an MLA-OCT imaging catheter calibration method, an MLA-OCT imaging system and an MLA-OCT imaging method of the MLA-OCT imaging system. The MLA-OCT imaging catheter comprises an inner tube, an outer tube and a multi-core catheter connector, wherein the inner tube comprises an optical fiber bundle and a microlens array. A light source in the MLA-OCT imaging system is divided into sample light and reference light by an interferometer, the sample light enters a signal arm to enter human tissue, thereference light enters a reference arm to reach an optical delay line, light returned from the two parts includes a first light signal and a second light signal, and the reference arm is provided with an optical delay line device. The MLA-OCT imaging method comprises steps as follows: a data processing device adjusts the position of the optical delay line according to a signal-to-noise ratio of an interference signal until the signal-to-noise ratio is the highest, and at the moment, a delay time value of the optical delay line of each optical fiber is an optical delay line calibration value and is stored in the MLA-OCT system; the MLA-OCT system sets length of the reference arm automatically on the basis of the optical delay line calibration values to detect the interference signal; a retracement controller actuates the MLA-OCT imaging catheter to move axially to perform axial scanning, so that a three-dimensional space image of the human tissue is established.

Description

technical field [0001] The invention relates to the technical field of medical endoscopic detection, in particular to an MLA-OCT imaging catheter, an MLA-OCT imaging system and an MLA-OCT imaging method. Background technique [0002] Coronary artery disease is the number one cause of death worldwide. Coronary artery disease can cause chest pain (angina), myocardial ischemia, and sudden cardiac death due to the buildup, rupture, and thrombus of atherosclerotic plaque. For those patients without sudden death or symptoms of chronic angina, appropriate plaque treatment includes PCI (Percutaneous Coronary Intervention, percutaneous coronary intervention). Cardiac interventional experts place stents through PCI to treat lesions. However, in recent years, many studies have found that cardiac stents have been abused, or at least overused, causing a lot of controversy. Doctors are more cautious and picky when considering only using stents. In addition, as less costly drug treatment...

AI Technical Summary

Problems solved by technology

In addition, when the imaging catheter is bent, it is easy to cause the rotation of the far and near ends to be out of sync, which will lead to the distortion of the image obtained by lumen OCT imaging.

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