Radiation imaging calibration
US4980904A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1988 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Jul 13, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/4266
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus and method is disclosed for facilitating calibration of a dual energy digital radiography system having a focused multi-element detector assembly. The apparatus includes two sets of calibration elements, each set made of a different basis material. Each calibration element defines a segment of an annulus and is positionable between the system source and detector such that the center defined by the annulus is substantially coincident with the focal spot of the source. Within individual sets, the thicknesses of the respective member elements differ one from another in accordance with a binary progression. Each of the calibration elements is positioned and sized such that it intercepts and attenuates all radiation which ultimately falls upon the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.