Systems and methods for spectroscopic measurement of a characteristic of biological tissue
First Claim
1. A system for spectroscopic measurement of a characteristic of a biological tissue, the system comprising:
- at least one light source operable to emit light that penetrates the biological tissue;
at least one light detector operable to detect light emitted by the at least one light source and passed through the biological tissue, and operable to convert the detected light into a detection signal; and
a processor operable to receive the detection signal, and operable to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted to account for an unwanted noise component present in the detection signal,wherein the processor includes a detector circuit, the detector circuit comprising;
a differentiating amplifier operable to receive the detection signal, and operable to convert the detection signal into a differentiated detection signal;
an adjustable gain amplifier operable to receive the differentiated detection signal, and operable to convert the differentiated detection signal into a differentiated and gain-adjusted detection signal;
a positive peak detector operable to receive the differentiated and gain-adjusted detection signal, and operable to determine a maximum value of the differentiated and gain-adjusted detection signal; and
a negative peak detector operable to receive the differentiated and gain-adjusted detection signal, and operable to determine a minimum value of the differentiated and gain-adjusted detection signal.
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Abstract
A method and system for spectroscopic measurement of a characteristic of a biological tissue is provided. The method includes the steps of: (1) using at least one light source to emit light that penetrates the biological tissue; (2) using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and (3) using a processor to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component.
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Citations
7 Claims
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1. A system for spectroscopic measurement of a characteristic of a biological tissue, the system comprising:
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at least one light source operable to emit light that penetrates the biological tissue; at least one light detector operable to detect light emitted by the at least one light source and passed through the biological tissue, and operable to convert the detected light into a detection signal; and a processor operable to receive the detection signal, and operable to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted to account for an unwanted noise component present in the detection signal, wherein the processor includes a detector circuit, the detector circuit comprising; a differentiating amplifier operable to receive the detection signal, and operable to convert the detection signal into a differentiated detection signal; an adjustable gain amplifier operable to receive the differentiated detection signal, and operable to convert the differentiated detection signal into a differentiated and gain-adjusted detection signal; a positive peak detector operable to receive the differentiated and gain-adjusted detection signal, and operable to determine a maximum value of the differentiated and gain-adjusted detection signal; and a negative peak detector operable to receive the differentiated and gain-adjusted detection signal, and operable to determine a minimum value of the differentiated and gain-adjusted detection signal. - View Dependent Claims (2, 3, 4)
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5. A method for spectroscopic measurement of a characteristic of a biological tissue, the method comprising the steps of:
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using at least one light source to emit light that penetrates the biological tissue; using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and using a processor to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component present within the detection signal, wherein the processor includes a detector circuit, the detector circuit comprising; a differentiating amplifier that receives the detection signal and converts the detection signal into a differentiated detection signal; an adjustable gain amplifier that receives the differentiated detection signal and converts the differentiated detection signal into a differentiated and gain-adjusted detection signal; a positive peak detector that receives the differentiated and gain-adjusted detection signal and determines a maximum value of the differentiated and gain-adjusted detection signal; and a negative peak detector that receives the differentiated and gain-adjusted detection signal and determines a minimum value of the differentiated and gain-adjusted detection signal. - View Dependent Claims (6, 7)
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Specification