| 摘要 |
PURPOSE:To accurately control the disappearing curve of a specific dye timewise, by irradiating the tissue of a living body and sampling the photoelectric converting signal corresponding to the light obtained from the living body to operate the intensity of said light and operating a function using a method of least squares while operating the value correlating with the concn. of the specific dye in blood on the basis of said function. CONSTITUTION:A photoreceptor 15 is mounted so as to receive the reflected light from an object to be examined of the light pulse from a light source 11 or 14. The output of the photoreceptor 15 is applied to an LOG converter 33 through an preamplifier 16 and an amplifier 34 to be converted logarithmically and the output of the LOG converter 33 is sampled by an A/D converter 32 to be outputted as a digital signal. This digital signal is applied to a CPU 23 through an I/O port 29 and the CPU 23 operates a plasma disappearing rate K=-B and a T-component stagnant rate R%=eB<t> to calculate the values K, R while the calculated values K, R are stored in an RAM 24. At this time, the CPU 23 operates a correlation function (r) using a method of least squares to store the same in the RAM 24. Further, the CPU 23 allows a buzzer 3 to generate the buzzer sound of termination at this time. |
