| 摘要 |
PROBLEM TO BE SOLVED: To eliminate an error due to differences of blood flow rates and improve the measurement precision of a laser blood flow meter.SOLUTION: A blood flow rate measuring apparatus includes: a laser beam irradiation part for irradiating a biological tissue with laser beams; a scattering light receiving part for receiving laser scattering light scattered by the biological tissue; a photoelectric conversion part for performing photoelectric conversion for the scattering light and outputting an analog electric signal; an A/D conversion part for converting the analog electric signal to a digital signal; a fast Fourier transformation part for performing fast Fourier transformation on the digital signal and acquiring a blood flow signal power spectrum; a power spectrum display part for displaying the blood flow signal power spectrum; a frequency range setting part for enabling specification of a frequency range used for calculating a blood flow rate from the blood flow signal power spectrum; and a blood flow rate calculation part for calculating the blood flow rate using the blood flow signal power spectrum of the specified frequency range. |
