Patent ID: 8108032
Filing Date: 2012-01-31
Classification: A61B

Abstract:
1. An optical coherent tomography diagnostic apparatus comprising: a light source for outputting light; a splitter for splitting the light outputted from the light source into a measuring light, a reference light, and a standard light; a measuring light path connected to the splitter to transmit the measuring light; a reference light path connected to the splitter to transmit the reference light; a standard light path connected to the splitter to transmit the standard light; a probe insertable into a body cavity, the probe being connected to the measuring light path to emit the measuring light to a subject of measurement, with light being reflected from the subject of measurement as reflection light; an image forming unit for calculating intensity distribution of the reflection light in an emission direction of the measuring light and for forming a tomographic image of the subject of measurement based on the intensity distribution by rendering the reflection light from the subject of measurement, which was obtained by the probe to have interference with the reference light; a light path length when exerting interference between the standard light and the reference light is approximately equal to a light path length when exerting interference between the reference light and the reflection light; and a calculation unit which calculates time change of coherent light data obtained by exerting interference between the standard light and the reference light; wherein the standard light path does not have a movable portion for varying the light path length.