Dual energy imaging with kinestatic charge detector
US4780897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | May 6, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/032
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for providing dual energy radiation images of a patient in a kinestatic charge detection system utilizes first and second kinestatic charge detectors commonly connected to apparatus for rotating the detectors about a radiation source at a predetermined velocity. The detectors are adjusted such that ion drift velocity in each detector is equal in magnitude but opposite in direction to the velocity of rotation of the detectors. The radiation from the radiation source is modulated such that relatively low average energy radiation impinging on the patient is received by the first detector and relatively high average energy radiation impinging on the patient is received by the second detector. As the radiation is scanned across the patient and received by the detectors, output data from each detector provides information representative of the intensity of radiation received during the scan. The output data is then combined by a imaging system to form a difference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.