Patent ID: 9560962
Date: 2017-02-07
CPC Classifications: A61B

Claim:
1. An optical tomographic image photographing apparatus for acquiring information on a tissue inside a specimen in a depth direction, the apparatus comprising: a light source configured to emit a light beam; a dividing unit configured to divide the emitted optical flux into a measuring beam and a reference beam; an attaching unit to which a probe is to be attached, the probe being configured to irradiate an inside of the specimen with the measuring beam and rotatably scan the inside of the specimen with the measuring beam; a synthesis unit configured to generate a first interference beam by synthesizing the measuring beam reflected from the tissue inside the specimen and the reference beam; a detector configured to detect the generated first interference beam as a first interference signal, the first interference beam being detected for each scanning position of the measuring beam; a processor; and memory storing a computer executable program, when executed by the processor, causing the optical tomographic image photographing apparatus to execute: a tomographic image acquiring instruction of acquiring tomographic information for each scanning position of the specimen by using the detected first interference signal and acquiring tomographic image data of the specimen expressed by polar coordinates by using the tomographic information; and a coordinate conversion instruction of converting the tomographic image data of the specimen expressed by the acquired polar coordinates into image data expressed by rectangular coordinates; and wherein: the synthesis unit generates a second interference beam obtained by synthesizing the measuring beam reflected from the inside of the probe without being applied to the inside of the specimen and the reference beam, the detector detects, as a second interference signal, the second interference beam and the reference, the tomographic image acquiring instruction causes the optical tomographic image photographing apparatus to acquire positional information of the inside of the probe from which the measuring beam is reflected by using the second interference signal, and the coordinate conversion instruction causes the optical tomographic image photographing apparatus to acquire a shaft position of a rotation axis when the probe rotatably scans the inside of the specimen with the measuring beam by using the acquired positional information of the inside of the probe and convert the tomographic image data of the specimen expressed by the polar coordinates into the tomographic image data expressed by the rectangular coordinates by setting the position of the acquired rotation axis as an origin of the polar coordinates system.