Remote radiation dosimetry

Patent · Mon Dec 31 23:00:00 EST 1990

OSTI ID:867738

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

---

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

/250/
administered
advantageously
apparatus
beam
beam generator
beam power
beam splitter
communicated
control
create
desirable
desired
desired beam
detected
detector
disclosed
dosages
dosimetry
emission
emits
energy
energy resulting
exposure
fiber
filtering
generator
ionizing
ionizing radiation
isolate
laser
laser beam
level
levels
luminescent
luminescent emission
luminescent energy
luminescent phosphor
measured
measurements
measuring
measuring radiation
measuring relative
methods
microns
mounted
particularly
particularly useful
period
phosphor
portions
power
preferably
probe
produce
produce desired
provide
radiation
radiation dosimetry
radiation level
radiation levels
radiation therapy
reading
relatively
remaining
remaining portion
remote
remote sensing
remote sensor
remotely
remotely measuring
resulting
return
selective
selective treatment
sensing
sensor
sensor mounted
serves
shorter
split
splitter
stimulate
stimulating
stored
stored luminescent
suitable
therapy
transmissive
treatment
useful
via
wavelengths