Method for direct measurement of absorbed dose rate of beta-rays and an instrument therefor
Patent
·
OSTI ID:5485816
A method and an instrument are, herein, disclosed for measuring the absorbed dose rate of beta-rays in sites of the human body. The instrument of this invention consists of a filter, a thin scintillator, a photomultiplier tube, a linear amplifier, a discriminator having a plurality of pulse height selection potentiometers for selectively taking in only pulses of pulse heights above specified upper limit of pulse height discrimination, a shaper for shaping the selected pulses, and a dose rate indicator for couting the shaped pulses. The method and the apparatus of this invention are characterized by making the relationship between the couting rate per fluence rate and the maximum energy of beta-ray equal to the realtionship between the absorbed dose rate per fluence rate and the maximum energy of beta-ray, and therefore, the absorbed dose rate can be measured independent of the energy of beta-ray.
- Assignee:
- Japan Atomic Energy Research Inst.
- Patent Number(s):
- US 4156139
- OSTI ID:
- 5485816
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440102* -- Radiation Instrumentation-- Radiation Dosemeters
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BETA DETECTION
BETA DOSIMETRY
BETA PARTICLES
CHARGED PARTICLE DETECTION
CHARGED PARTICLES
DEPTH DOSE DISTRIBUTIONS
DETECTION
DOSE RATEMETERS
DOSE RATES
DOSES
DOSIMETRY
MEDICINE
NUCLEAR MEDICINE
PATIENTS
RADIATION DETECTION
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
RADIATION PROTECTION
RADIOLOGY
RADIOTHERAPY
SPATIAL DOSE DISTRIBUTIONS
THERAPY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BETA DETECTION
BETA DOSIMETRY
BETA PARTICLES
CHARGED PARTICLE DETECTION
CHARGED PARTICLES
DEPTH DOSE DISTRIBUTIONS
DETECTION
DOSE RATEMETERS
DOSE RATES
DOSES
DOSIMETRY
MEDICINE
NUCLEAR MEDICINE
PATIENTS
RADIATION DETECTION
RADIATION DOSE DISTRIBUTIONS
RADIATION DOSES
RADIATION PROTECTION
RADIOLOGY
RADIOTHERAPY
SPATIAL DOSE DISTRIBUTIONS
THERAPY