Plain x-ray bone densitometry apparatus and method
US5917877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Non-invasive quantitative plain radiographic evaluation of bone in a bony locale of a body is performed by subjecting the bony locale to a broadband collimated x-ray beam having energy in the range of about 20 keV to 150 keV. Alongside the bony locale is a multiple-material phantom containing at least two distinct materials. An energy-selective multiple-film detector cassette containing at least two films is placed under the body and multiple-material phantom to receive the transmitted x-ray beam. The films in the cassette are developed and digitally scanned to produce sets of multiple-material phantom data and sets of bone data. The data sets are then processed with a nonlinear algorithm whereby to generate the indicated estimate of bone status, namely, bone-mineral density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.