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US 5,632,273 AGranted
Method and means for measurement of biochemical components
AssigneeHamamatsu Photonics K.K.
InventorSusumu Suzuki
Life of this patent
Estimating the term…
Abstract
Biochemical components and changes in the components are measured by directing light of several wavelengths into a body at one location, sensing light at the wavelengths emerging from the body at a plurality of distances from the one location, and ascertaining biochemical component characteristics in the body as a function of variations, with respect to distance, of the logarithm of the ratio of the light sensed to the light directed into the body. The variations with respect to distance are in the form of the derivative and square of the derivatives of the logarithm.
Claims28
The method, comprising:
- directing electromagnetic radiation at one or more wavelengths into a body at one location;
- sensing electromagnetic radiation at the wavelengths emerging from the body at a plurality of distances from the one location;
- and
- ascertaining biochemical component characteristics in the body as a function of differences in a negative logarithm of the electromagnetic radiation sensed for the wavelengths at the plurality of distances, and a scattering coefficient relative to the wavelengths at each of the distances.
1 more element
An apparatus, comprising:
- means for directing electromagnetic radiation at one or more wavelengths into a body at one location;
- means for sensing electromagnetic radiation at the plurality of wavelengths emerging from the body at a plurality of distances from the one location;
- and
- means for ascertaining biochemical component characteristics in the body as a function of differences in a negative logarithm of the electromagnetic radiation sensed for the wavelengths at the plurality of distances, and a scattering coefficient relative to the wavelengths at each of the distances.
1 more element
Dependencies are inferred from the claim text.