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US 12,504,548 B2Granted
Measuring device, measuring method, measuring system, and radiation therapy system
AssigneeSumitomo Heavy Industries, Ltd.
InventorsTetsuya Mukawa, Hiroki Tanaka
Life of this patent
Estimating the term…
Abstract
A measuring device includes an ionization chamber where air is contained and a measurement value relating to radiation including a neutron ray and a gamma ray is measured, a detector that detects a detection value relating to the neutron ray, and a controller that calculates a dose of the gamma ray based on the measurement value measured in the ionization chamber and the detection value detected by the detector.
Claims12
A measuring device comprising:
- an ionization chamber where air is contained and a measurement value relating to radiation including a neutron ray and a gamma ray is measured;
- a detector that detects a detection value relating to the neutron ray;
- and
- a controller that calculates a dose of the gamma ray based on the measurement value measured in the ionization chamber and the detection value detected by the detector,
- wherein the measurement value includes a first ionization amount due to a reaction between the air in the ionization chamber and the neutron ray and a second ionization amount due to a reaction between the air in the ionization chamber and the gamma ray, and
- the controller is configured to
- remove a contribution of the first ionization amount from the measurement value to calculate the second ionization amount, and
- calculate the dose of the gamma ray based on the second ionization amount.
5 more elements
A measuring method comprising:
- calculating, based on a measurement value relating to radiation including a neutron ray and a gamma ray, which is measured in an ionization chamber containing air inside, and a detection value relating to the neutron ray, which is detected by a detector, a dose of the gamma ray,
- wherein the measurement value includes a first ionization amount due to a reaction between the air in the ionization chamber and the neutron ray and a second ionization amount due to a reaction between the air in the ionization chamber and the gamma ray,
- the first ionization amount is calculated by removing a contribution of the first ionization amount from the measurement value, and
- the dose of the gamma ray is calculated based on the second ionization amount.
1 more element
A measuring system comprising:
- a radiation therapy apparatus that emits radiation including a neutron ray and a gamma ray;
- and
- a measuring device including
- an ionization chamber where air is contained and a measurement value relating to the radiation including the neutron ray and the gamma ray is measured,
- a detector that detects a detection value relating to the neutron ray, and
- a controller that calculates a dose of the gamma ray based on the measurement value measured in the ionization chamber and the detection value detected by the detector,
- wherein the measurement value includes a first ionization amount due to a reaction between the air in the ionization chamber and the neutron ray and a second ionization amount due to a reaction between the air in the ionization chamber and the gamma ray, and
- the controller is configured to
- remove a contribution of the first ionization amount from the measurement value to calculate the second ionization amount, and
- calculate the dose of the gamma ray based on the second ionization amount.
7 more elements
A radiation therapy system comprising:
- a radiation therapy apparatus that emits radiation including a neutron ray and a gamma ray;
- and
- a measuring device including
- an ionization chamber where air is contained and a measurement value relating to the radiation including the neutron ray and the gamma ray is measured,
- a detector that detects a detection value relating to the neutron ray, and
- a controller that calculates a dose of the gamma ray based on the measurement value measured in the ionization chamber and the detection value detected by the detector,
- wherein the measurement value includes a first ionization amount due to a reaction between the air in the ionization chamber and the neutron ray and a second ionization amount due to a reaction between the air in the ionization chamber and the gamma ray,
- the controller is configured to
- remove a contribution of the first ionization amount from the measurement value to calculate the second ionization amount, and
- calculate the dose of the gamma ray based on the second ionization amount, and
- the radiation therapy apparatus controls the emission of the radiation by using the dose of the gamma ray calculated by the controller.
8 more elements
Dependencies are inferred from the claim text.