Remote radiation dosimetry
Disclosed are methods and apparatus for remotely measuring radiation levels. Such are particularly useful for measuring relatively high levels or dosages of radiation being administered in radiation therapy. They are also useful for more general radiation level measurements where remote sensing from the remaining portions of the apparatus is desirable. The apparatus uses a beam generator, such as a laser beam, to provide a stimulating beam. The stimulating beam is preferably of wavelengths shorter than 6 microns, or more advantageously less than 2 microns. The stimulating beam is used to stimulate a remote luminescent sensor mounted in a probe which emits stored luminescent energy resulting from exposure of the sensor to ionizing radiation. The stimulating beam is communicated to the remote luminescent sensor via a transmissive fiber which also preferably serves to return the emission from the luminescent sensor. The stimulating beam is advantageously split by a beam splitter to create a detector beam which is measured for power during a reading period during which the luminescent phosphor is read. The detected power is preferably used to control the beam generator to thus produce desired beam power during the reading period. The luminescent emission from the remote sensor is communicated to a suitable emission detector, preferably after filtering or other selective treatment to better isolate the luminescent emission. 8 figures.
- Research Organization:
- International Sensor Technol
- DOE Contract Number:
- AC03-85ER80226
- Assignee:
- International Sensor Technology, Inc., Pullman, WA (United States)
- Patent Number(s):
- US 4999504; A
- Application Number:
- PPN: US 7-359110
- OSTI ID:
- 7273645
- Resource Relation:
- Patent File Date: 31 May 1989
- Country of Publication:
- United States
- Language:
- English
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DOSEMETERS
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MEASURING METHODS
RADIATION DOSES
REMOTE SENSING
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MEASURING INSTRUMENTS
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