Hybrid dosimetry and imaging system
US-2020041662-A1 · Feb 6, 2020 · US
Radiation monitor
US2020064495A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020064495-A1 |
| Application number | US-201916415052-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 17, 2019 |
| Priority date | Aug 21, 2018 |
| Publication date | Feb 27, 2020 |
| Grant date | — |
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Abstract
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A radiation monitor according to the present invention includes: a radiation sensing unit which includes phosphors emitting a photon with respect to an incident radiation; and a photon sending unit which sends the photon emitted from the phosphors of the radiation sensing unit, wherein the phosphors form a multilayer structure including a first phosphor and a second phosphor, and a photon absorbing layer absorbing a photon emitted from a phosphor is provided between the first phosphor and the second phosphor.
First claim
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1 . A radiation monitor comprising: a radiation sensing unit which includes phosphors emitting a photon with respect to an incident radiation; and a photon sending unit which sends the photon emitted from the phosphors of the radiation sensing unit, wherein the phosphors form a multilayer structure including a first phosphor and a second phosphor, and a photon absorbing layer absorbing a photon emitted from the phosphor is provided between the first phosphor and the second phosphor. 2 . The radiation monitor according to claim 1 , wherein the first phosphor and the second phosphor form a nested structure. 3 . The radiation monitor according to claim 2 , wherein the phosphors each has a cylindrical shape. 4 . The radiation monitor according to claim 2 , wherein the phosphors each has a prism shape. 5 . The radiation monitor according to claim 2 , wherein the phosphors each has a hemispherical shape. 6 . The radiation monitor according to claim 2 , wherein a transmittance of the first phosphor and a transmittance of the second phosphor are different from each other. 7 . The radiation monitor according to claim 2 , wherein a density of the first phosphor and a density of the second phosphor are different from each other. 8 . The radiation monitor according to claim 1 , further comprising: an optical filter which attenuates the number of photons sent from the photon sending unit; and a photodetector which converts the photon sent from the optical filter into an electric pulse signal, wherein the optical filter is connected to the photon sending unit and the photodetector. 9 . The radiation monitor according to claim 8 , wherein the number of radiation sensing units and the number of photon sending units are plural, and radiation dose rates at a plurality of different positions are measured. 10 . The radiation monitor according to claim 9 , further comprising: a light selection unit which selects any one of light sent from a first optical fiber and light sent from a second optical fiber as light to be acquired by the photodetector as an electric pulse signal; and a control unit which controls the light selection unit. 11 . The radiation monitor according to claim 10 , wherein the optical filter is connected to the light selection unit and the photodetector. 12 . The radiation monitor according to claim 11 , wherein the number of optical filters is plural, a first optical filter is connected to the first optical fiber and the light selection unit, and the second optical filter is connected to the second optical fiber and the light selection unit. 13 . A radiation monitor comprising: a radiation sensing unit which includes phosphors emitting a photon with respect to an incident radiation; and a photon sending unit which sends the photon emitted from the phosphors of the radiation sensing unit, wherein the phosphors form a nested structure including a first phosphor and a second phosphor, and a transmittance of the first phosphor and a transmittance of the second phosphor are different from each other.
Assignees
Inventors
Classifications
- G01T1/023Primary
Scintillation dose-rate meters · CPC title
- G01T1/2006Primary
using a combination of a scintillator and photodetector which measures the means radiation intensity · CPC title
using a combination of different types of scintillation detectors, e.g. phoswich · CPC title
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- What does patent US2020064495A1 cover?
- A radiation monitor according to the present invention includes: a radiation sensing unit which includes phosphors emitting a photon with respect to an incident radiation; and a photon sending unit which sends the photon emitted from the phosphors of the radiation sensing unit, wherein the phosphors form a multilayer structure including a first phosphor and a second phosphor, and a photon absor…
- Who is the assignee on this patent?
- Hitachi Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01T1/023. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Feb 27 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).