Measuring arrangement for tissue-optical examination of a subject with visible, NIR or IR light
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United States of America Patent
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Mar 15, 1994
Grant Date -
N/A
app pub date -
Aug 26, 1992
filing date -
Aug 29, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for optically analyzing tissue in a subject directs coherent light and ultrasound at the subject along parallel propagation paths. The ultrasound causes a Doppler shift in the light emerging from the subject, this shift being related to certain tissue characteristics. The light emerging from the subject is detected and a corresponding signal is supplied to an evaluation stage which absolutely or relatively calculates the intensity of those parts of the detected light which proceeded through tissue not charged by ultrasound and those parts of the detected light which proceeded through tissue charged by ultrasound.
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