Doppler velocimeter for blood flow
First Claim
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1. A Doppler velocimeter comprising:
- an illumination system for illuminating a blood vessel with a light beam;
a detector for detecting Doppler-shifted scattered light produced from blood flowing in the blood vessel; and
a processor for obtaining a blood flow velocity by analyzing a signal from said detector, wherein said processor compares an actual power spectrum obtained by frequency-analyzing the signal with a theoretical power spectrum obtained using a frequency as a parameter while changing the parameter.
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Abstract
A Doppler velocimeter includes an illumination system for illuminating a blood vessel with a light beam, a detector for detecting Doppler-shifted scattered light produced from blood flowing in the blood vessel, and a processor for obtaining a blood flow velocity by analyzing a signal from said detector. The processor compares an actual power spectrum obtained by frequency-analyzing the signal with a theoretical power spectrum obtained using a frequency as a parameter while changing the parameter.
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Citations
15 Claims
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1. A Doppler velocimeter comprising:
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an illumination system for illuminating a blood vessel with a light beam;
a detector for detecting Doppler-shifted scattered light produced from blood flowing in the blood vessel; and
a processor for obtaining a blood flow velocity by analyzing a signal from said detector, wherein said processor compares an actual power spectrum obtained by frequency-analyzing the signal with a theoretical power spectrum obtained using a frequency as a parameter while changing the parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15)
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13. A Doppler velocimeter comprising:
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an illumination system for illuminating a fluid with a light beam;
a detector for detecting Doppler-shifted scattered light produced from the fluid; and
a processor for obtaining a flow velocity of the fluid by analyzing a signal from said detector, wherein said processor compares an actual power spectrum obtained by frequency-analyzing the signal with a theoretical power spectrum obtained using a frequency as a parameter while changing the parameter.
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Specification