MLA-OCT IMAGING CATHETER, MLA-OCT IMAGING SYSTEM AND MLA-OCT IMAGING METHOD

摘要

Provided are an MLA-OCT imaging catheter (3), a calibration method of the MLA-OCT imaging catheter, an MLA-OCT imaging system and an imaging method thereof. The MLA-OCT imaging catheter (3) comprises an inner tube (5), an outer tube (4) and a multi-core catheter connector (6), wherein the inner tube (5) comprises an optical fiber bundle (21) and a microlens array (7). In the MLA-OCT imaging system, a light source (14) is divided into a sample light and a reference light by an interferometer (15), wherein the sample light enters a signal arm to reach human tissue, while the reference light enters a reference arm to reach an optical delay line; the light returned from said two locations is respectively a first optical signal and a second optical signal, and the reference arm is provided with an optical delay line device. The MLA-OCT imaging method includes: adjusting the position of an optical delay line by a data processing device according to the signal-to-noise ratio of the interference signal until the signal-to-noise ratio is the highest, at this time the value of the delay time for the optical delay line of each optical fiber is the calibration value of the optical delay line which is stored in an MLA-OCT system; automatically setting the arm length of a reference arm by the MLA-OCT system based on the calibration value of the optical delay line, so as to detect the interference signal; and actuating an MLA-OCT imaging catheter (3) to move axially by a retracement controller to perform axial scanning, so as to generate a three-dimensional image of human tissue.