Method of and means for compensating for the dead time of a gamma camera
US4369495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1980 |
| Grant date | Jan 18, 1983 |
| Priority date | — |
| Expiry date | Jun 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/922
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The dead time of a nuclear imaging system is compensated for when recording a representation of a dynamically changing radiation field into an image memory by injecting into the system synthetic pulses which resemble, in terms of amplitude and shape, the pulses produced by the system in response to interaction with stimuli from the radiation field, and by determining the percentage of synthetic pulses which are processed by the system. A correction factor based on such percentage is applied to the representation of the field. The synthetic pulses are injected into the system at a predetermined rate with respect to the rate of pulses processed by the system in response to interactions with stimuli from the radiation field. This predetermined rate is functionally related to the rate at which input signals are processed by the system. The synthetic signals are injected in such a way that relatively low correlation exists between the pulses produced by interactions of stimuli from the radiation field and the synthetic pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.