Substance quantitative analysis method
US5247559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Oct 5, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Radiation transmission intensity information obtained from a radiation source of two different energy levels or energy bands is used to perform an energy subtraction calculation and quantify the constituent substances of the object being analyzed. The objective is to simultaneously detect and quantify the plural substances composing the object being analyzed in a single operation using a single subtraction calculation equation. An energy subtraction calculation is first performed to eliminate a specific substance in the object being analyzed, making it possible to simultaneously determine the other two constituent substances using the negativity of the calculated result. When three substances are overlapping in the direction of radiation transmission, using the transmission intensity information from a radiation source with only two energy levels, the effect of one substance is eliminated while identifying and quantifying the other two by applying an energy subtraction calculation process that eliminates the first substance and obtains the density of a third substance, and obtains the density of the third substance in an area where the three substances overlap based on the calculat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.