Gamma camera system with improved means for correcting nonuniformity
In a gamma camera system, means are provided for correcting nonuniformity or lack of correspondence between the positions of scintillations and their calculated and displayed by x-y coordinates. In an accumulation mode, pulse counts corresponding with scintillations in various areas of the radiation field are stored in memory locations corresponding with their locations in the radiation field. A uniform radiation source is presented to the detectors during the accumulation is interrupted at which time other locations have fewer counts in them. In the run mode, counts are stored in corresponding locations of a memory and these counts are compared continuously with those stored in the accumulation mode. Means are provided for injecting a number of counts during the run mode proportional to the difference between the counts accumulated during the accumulation mode in a given area increment and the counts that should have been obtained from a uniform source.
- Assignee:
- General Electric Co.
- Patent Number(s):
- US 4179607
- OSTI ID:
- 5666408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CAMERAS
COLLIMATORS
DESIGN
DIAGRAMS
DISPLAY DEVICES
ELECTRONIC CIRCUITS
EQUIPMENT
GAMMA CAMERAS
MEASURING INSTRUMENTS
PHOTOMULTIPLIERS
PHOTOTUBES
RADIATION DETECTORS
RECORDING SYSTEMS
SCINTILLATION COUNTERS