Remote radiation dosimetry

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:867738

Braunlich, Peter F ^[1]; Tetzlaff, Wolfgang ^[1]; Hegland, Joel E ^[1]; Jones, Scott C ^[1]

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1. Pullman, WA

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 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.

• Research Organization: International Sensor Technol
• DOE Contract Number: AC03-85ER80226
• Assignee: International Sensor Technology, Inc. (Pullman, WA)
• Patent Number(s): US 4999504
• OSTI ID: 867738
• Country of Publication: United States
• Language: English

Related Subjects

remote
radiation
dosimetry
disclosed
methods
apparatus
remotely
measuring
levels
particularly
useful
relatively
dosages
administered
therapy
level
measurements
sensing
remaining
portions
desirable
beam
generator
laser
provide
stimulating
preferably
wavelengths
shorter
microns
advantageously
stimulate
luminescent
sensor
mounted
probe
emits
stored
energy
resulting
exposure
ionizing
communicated
via
transmissive
fiber
serves
return
emission
split
splitter
create
detector
measured
power
reading
period
phosphor
detected
control
produce
desired
suitable
filtering
selective
treatment
isolate
luminescent energy
remote sensing
radiation level
beam generator
beam splitter
laser beam
particularly useful
ionizing radiation
remaining portion
beam power
radiation therapy
sensor mounted
stored luminescent
remote sensor
radiation levels
measuring radiation
desired beam
energy resulting
luminescent emission
produce desired
selective treatment
radiation dosimetry
remotely measuring
measuring relative
luminescent phosphor
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