Methods and apparatus for quantifying dermal hydration
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United States of America Patent
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Jul 29, 2003
Grant Date -
N/A
app pub date -
Aug 11, 2000
filing date -
Aug 11, 2000
priority date (Note) -
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Abstract
Dermal hydration is determined in a target region of a human subject by determining a relationship between first and second measurements. The first measurement is a measurement of a first type of electromagnetic radiation that has been reflected from the target region, the second measurement is a measurement of a second type of electromagnetic radiation that has been reflected from the target region, and the second type of electromagnetic radiation is absorbed by liquid, namely water or perspiration, to a greater degree than the first type of electromagnetic radiation is absorbed by the liquid. The electromagnetic radiation that is reflected from the region and measured is initially transmitted to the region from a remote location, and the transmitted electromagnetic radiation is not visible to a naked human eye. An examination being carried out in accordance with the present invention can be carried out while the region is moving, by tracking the region. As a result, examinations carried out in accordance with the present invention can advantageously be relatively noninvasive, and the subject being examined need not even be aware of the examination.
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