Calibration phantom and improved method of quantifying calcium and bone density using same
US5335260A · kind A · utility
Inventor
Key dates
| Filing date | Nov 25, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/482
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A calibration phantom representative of human tissue containing variable concentrations of calcium serves as a calibration reference for quantifying calcium, bone mass and bone mineral density in radiography and CT imaging systems. The method of fabrication of the calibration phantom provides the long-term stable incorporation of calcium into a tissue equivalent material which allows accurate, standardized, and reproducible quantification of calcium and bone mineral density in radiography and CT imaging systems. A method of using the calibration phantom for quantifying calcium and bone includes placement of part of a patient's anatomy in a bolusing apparatus to provide uniform attenuation of the x-ray beam passing through and around the patient's anatomy. A x-ray filter plate may be used to predictably attenuate the x-ray beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.