Point source for testing a gamma camera
Patent
·
OSTI ID:6656300
This patent describes an apparatus for calibrating a gamma camera comprising: a housing; a point source having an active member mounted in the housing, the point source having a predetermined radioactivity content associated therewith able to produce a predetermined gamma ray flux that decreases over time; a shutter incrementally movable with respect to the housing from a first position in which the active member is totally exposed; and a calibration indicia operative associating the housing and the shutter and relating the shutter opening to passage of time so that the magnitude of the active member exposed over a predetermined time period is such that a relatively constant gamma ray flux is emitted over that time period.
- Assignee:
- E.I. Du Pont de Nemours and Co., Wilmington, DE
- Patent Number(s):
- US 4771177
- OSTI ID:
- 6656300
- Country of Publication:
- United States
- Language:
- English
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