Blood information measuring method and apparatus

摘要

In a special mode, a superficial layer wavelength set, a middle layer wavelength set, and a deep layer wavelength set are selected successively. Each wavelength set is composed of 3 different types of narrowband light applied successively to an internal body portion. A wavelength set table specifies the number of repetitions of each wavelength set. A controller controls a wavelength band switching element to apply every type of the narrowband light of each wavelength set, and to apply each wavelength set for the number of repetitions specified by the wavelength set table. A CCD captures images of the internal body portion under illumination of the narrowband light of the respective wavelength sets. A blood information calculation section calculates oxygen saturation levels of hemoglobin in blood vessels in the superficial, middle, and deep layers based on image signals, respectively. This provides information on cancer progression.

主权项

1. A blood information measuring apparatus comprising:
a lighting section for applying illumination light to an internal body portion including a blood vessel; an imaging section for receiving reflection light from the internal body portion illuminated with the illumination light, and outputting an image signal; a wavelength band switching section for switching among wavelength bands of the illumination light to be applied to the internal body portion or of the reflection light to be incident on the imaging section such that two or more types of narrowband light constituting a designated wavelength set are applied or received successively, the two or more types of the narrowband light penetrating to similar depths into the internal body portion; a memory storing a wavelength set table in which the wavelength sets and the number of repetitions of the application of each wavelength set are stored, the number of repetitions of the application of at least one of the wavelength sets being two or more, and a combination of the number of repetitions of the application of each wavelength set being different according to a location of the internal body portion; a wavelength band switching controller for controlling the wavelength band switching section to automatically and successively switch the designated wavelength set among the wavelength sets such that the application of the illumination light or the receipt of the reflection light of each of the wavelength sets is carried out for the number of repetitions stored in the wavelength set table; a location detecting section for detecting a location of the internal body portion, wherein the combination of the number of repetitions of application of each of the wavelength sets is determined automatically based on the location detected, and a blood information calculation section for calculating blood information of blood in the blood vessel based on the image signal.