Control device for imaging system, imaging system, and method for controlling imaging system

Patent metadata

Field	Value
Publication number	US-2018228352-A1
Application number	US-201815953967-A
Country	US
Kind code	A1
Filing date	Apr 16, 2018
Priority date	Oct 27, 2015
Publication date	Aug 16, 2018
Grant date	—

Abstract

A control device for an imaging system includes a video signal acquisition unit, a photometric unit, and a luminance control unit. The video signal acquisition unit is configured to acquire a video signal obtained by taking an image of fluorescence radiated from a subject under excitation by an excitation light that is emitted onto the subject. The photometric unit is configured to acquire brightness of the fluorescence based only on a color-specific video signal of one color corresponding to the fluorescence, the color-specific video signal being included in the video signal. The luminance control unit is configured to adjust luminance of a fluorescent image formed from the video signal, based on the brightness of the fluorescence acquired by the photometric unit.

First claim

1 .- 9 . (canceled)

10 . An imaging system comprising:
a light source device configured to emit a green light, a blue light, and a red light onto a subject in a normal light observation mode, and to emit the green light, the blue light, and excitation light based on near-infrared light onto the subject in an infrared light observation mode, wherein an output intensity of the excitation light is set higher than output intensities of the green light and the blue light; an imaging device configured to take an image of return light of illumination light emitted from the light source device, the return light returning from the subject; and at least one processor configured to:
acquire a video signal of the image taken by the imaging device;
multiply a video signal of each color of red, green, and blue by a detection parameter of a specific ratio in the normal light observation mode, and multiply the video signal of the taken image for each color by a parameter of a specific ratio that is different from the detection parameter used in the normal light observation mode in the infrared light observation mode, as a detection processing;
calculate luminance based on a red image signal, a green image signal, and a blue image signal that have been subjected to the detection processing in the normal light observation mode, and calculate luminance based on a video signal that includes information of the red image signal only that has been subjected to the detection processing in the infrared light observation mode; and
adjust an electronic shutter of the imaging device so as to form an image for each field based on the calculated luminance in the normal light observation mode, and make multi-exposure settings for the imaging device so as to form an image for a plurality of fields based on the calculated luminance in the infrared light observation mode.

11 . The imaging system according to claim 10 , wherein the processor is configured to make settings for gain adjustment of the video signal that has been subjected to the detection processing, based on the calculated luminance.

12 . The imaging system according to claim 10 , wherein the processor is configured to make settings for outputs of the light source device based on the calculated luminance.

Assignees

• Olympus Corp

Inventors

• Kojima Koji

Classifications

• A61B1/043

  for fluorescence imaging · CPC title

• A61B1/0638 Primary

  providing two or more wavelengths · CPC title

• A61B1/0653

  with wavelength conversion · CPC title

• A61B1/00006

  of control signals · CPC title

• A61B1/00009

  of image signals during a use of endoscope · CPC title