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US 12,745,893 B2Granted
Processor device, method of operating the same, and endoscope system
AssigneeFUJIFILM Corporation
InventorTakaaki Saito
Life of this patent
Estimating the term…
Abstract
Oxygen saturation is calculated on the basis of a calculation value with reference to an oxygen saturation calculation table TBL. A specific colorant concentration of a specific colorant other than hemoglobin is calculated on the basis of B3 image signals and G1 image signals. Whether or not a first difference D1 between the specific colorant concentration and a reference concentration is in a specific range is monitored. A correction notification related to correction of the oxygen saturation calculation table TBL is performed on the basis of a result of the monitoring of the specific colorant concentration.
Claims8
A processor device comprising:
- one or more processors configured to:
- receive image signals input from an endoscope;
- remove noise from the image signals to output noise-removed image signals;
- acquire, among the noise-removed image signals, a first image signal that corresponds to a first wavelength range having a sensitivity to a specific colorant concentration of a specific colorant other than blood hemoglobin among colorants included in a subject of observation, a second image signal that corresponds to a second wavelength range having a sensitivity to oxygen saturation of blood hemoglobin, a third image signal that corresponds to a third wavelength range having a sensitivity to a blood volume, and a fourth image signal that corresponds to a fourth wavelength range having a wavelength longer than wavelengths of the first wavelength range, the second wavelength range, and the third wavelength range;
- calculate a calculation value via calculation processing based on the second image signal, the third image signal, and the fourth image signal;
- calculate the oxygen saturation on the basis of the calculation value with reference to an oxygen saturation calculation table;
- calculate a signal ratio of the first image signal to the third image signal as the specific colorant concentration on the basis of the first image signal and the third image signal;
- and
- monitor the specific colorant concentration during the calculation of the oxygen saturation by continuously calculating a first difference or a first ratio between the specific colorant concentration and a reference concentration, wherein the reference concentration is the specific colorant concentration obtained at a timing at which the oxygen saturation calculation table is corrected in response to an operation of a user;
- and
- a display, configured to perform a correction notification by displaying to the user on the display in response to determining that the first difference or the first ratio is out of a specific range.
8 more elements
A method of operating a processor device, the method, executed by one or more processors, comprising:
- a step of receiving image signals input from an endoscope;
- a step of removing noise from the image signals to output noise-removed image signals;
- a step of acquiring, among the noise-removed image signals, a first image signal that corresponds to a first wavelength range having a sensitivity to a specific colorant concentration of a specific colorant other than blood hemoglobin among colorants included in a subject of observation, a second image signal that corresponds to a second wavelength range having a sensitivity to oxygen saturation of blood hemoglobin, a third image signal that corresponds to a third wavelength range having a sensitivity to a blood volume, and a fourth image signal that corresponds to a fourth wavelength range having a wavelength longer than wavelengths of the first wavelength range, the second wavelength range, and the third wavelength range;
- a step of calculating a calculation value via calculation processing based on the second image signal, the third image signal, and the fourth image signal;
- a step of calculating the oxygen saturation on the basis of the calculation value with reference to an oxygen saturation calculation table;
- a step of calculating a signal ratio of the first image signal to the third image signal as the specific colorant concentration on the basis of the first image signal and the third image signal;
- and
- a step of monitoring the specific colorant concentration during the calculation of the oxygen saturation by continuously calculating a first difference or a first ratio between the specific colorant concentration and a reference concentration, wherein the reference concentration is the specific colorant concentration obtained at a timing at which the oxygen saturation calculation table is corrected in response to an operation of a user, and
- a step of performing a correction notification, via a display, by displaying to the user on the display in response to determining that the first difference or the first ratio is out of a specific range.
6 more elements
Dependencies are inferred from the claim text.