Radiation dosimeter and radiation dose computing program
AssigneeNational University Corporation Hokkaido University
InventorMasayori Ishikawa
Life of this patent
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Abstract
Light emitted in correspondence to ionizing radiation incident from a scintillator is fed through an optical fiber to a photoelectron multiplier tube by which it is converted to an electrical signal. The electrical signal is amplified by a signal amplifying circuit, and any light emission events of given or higher intensity are discriminated by a discriminator and counted by a counter. The count value is fed to a computer. The computer converts the count value to a dosage on the basis of an exponential relationship lying between the light emission intensity and the number of emission events, thereby attaining detection of the dosage.
Claims13
A radiation dosimeter, comprising;
- a scintillator which emits light by incident ionizing radiation;
- a photoelectric converter which converts light, which is an output of the scintillator, to an electric current;
- a counter which counts the number of events, concerning an output from the photoelectric converter, having an intensity that is a predetermined threshold value or greater;
- and
- a dosage computing unit which converts a count value obtained by the counter to a dosage to obtain the dosage, based on a relationship in which a frequency of occurrence of each event exponentially decreases as the intensity of light of the event increases.
A radiation dose computing program for computing a dosage by a scintillator, the program causing a computer to execute a process comprising:
- accepting a count value obtained by counting a number of events having an intensity of a predetermined threshold value or greater, concerning an electrical signal which is converted to an electric current from a light output from the scintillator which emits light by incident ionizing radiation;
- and
- converting the count value which is accepted to a dosage based on a relationship in which a frequency of occurrence of each event exponentially decreases as the intensity of light of the event increases, thereby obtaining the dosage.
A medium storing a radiation dose computing program for computing a dosage by a scintillator, the program causing a computer to execute a process comprising:
- accepting a count value obtained by counting a number of events having an intensity of a predetermined threshold value or greater, concerning an electrical signal which is converted to an electric current from a light output from the scintillator which emits light by incident ionizing radiation;
- and
- converting the count value which is accepted to a dosage based on a relationship in which a frequency of occurrence of each event exponentially decreases as the intensity of light of the event increases, thereby obtaining the dosage.
Dependencies are inferred from the claim text.