WO2018124874A1 - Real time radiation dosimetry system - Google Patents
Real time radiation dosimetry system Download PDFInfo
- Publication number
- WO2018124874A1 WO2018124874A1 PCT/MY2017/050085 MY2017050085W WO2018124874A1 WO 2018124874 A1 WO2018124874 A1 WO 2018124874A1 MY 2017050085 W MY2017050085 W MY 2017050085W WO 2018124874 A1 WO2018124874 A1 WO 2018124874A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radioluminescence
- signal
- dosimeter
- radiation
- dosimetry system
- Prior art date
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 50
- 238000004980 dosimetry Methods 0.000 title claims abstract description 27
- 238000005395 radioluminescence Methods 0.000 claims abstract description 114
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 229910052732 germanium Inorganic materials 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- 231100000987 absorbed dose Toxicity 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000005865 ionizing radiation Effects 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000011540 sensing material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/02—Dosimeters
- G01T1/10—Luminescent dosimeters
Definitions
- the invention generally relates to a radiation dosimetry, and more particularly it relates to a real time radiation dosimetry based on radioluminescence.
- thermoluminescent phosphors such as LiF (TLD- 100, TLD-600, TLD-700) and CaF 2 (TLD-300, TLD-400). These materials are contained in TLD badges and exposed to radiation prone locations for duration ranging from minutes to months. Thermoluminescent phosphors generate free electrons during exposure to irradiation, which are trapped in the forbidden band gap as soon as the irradiation stops. These electrons are captured in traps between the valence and conduction band of the material. When heat is applied to the thermoluminescent phosphors, the electrons recombine at recombination centers emitting light. This light is proportional to the cumulative absorbed radiation dose. An alternative method to release such traps is by using light of appropriate wavelength (material dependent) instead of heat. This process is known as Optically Stimulated Luminescence (OSL).
- OSL Optically Stimulated Luminescence
- the present invention provides a real time radiation dosimetry system that can accomplish instant read out measurement of the absorbed radiation dose based on radioluminescence.
- the radioluminescence signal emitted by the radioluminescence dosimeter has constant intensity level for consistent dose rate. The intensity is linearly proportional to changes in the dose rate provided to the specimen, in order to calculate rate of the radiation absorption by the specimen in real time.
- the radioluminescence dosimeter is a fabricated germanium-doped silica optical fiber.
- the dosimetry system includes a radiation hardened fiber to guide the radioluminescence signal from the radioluminescence dosimeter to the radioluminescence reader.
- the lens is a convex lens.
- the radioluminescence dosimetry system includes a signal processor to analyze the radioluminescence signal received from the photodetector.
- the radioluminescence dosimetry system is a real-time dosimetry system.
- the radioluminescence dosimeter is reusable.
- the radiation hardened fiber enables the radioluminescence signal with spatial resolution.
- Fig. 1 shows the schematic of the real-time radioluminescence dosimeter system, according to the invention
- Fig. 2 shows the profile of the radioluminescence dosimeter and the radiation hardened fiber, according to the invention
- Fig. 3 shows the response of the radioluminescence dosimetry system in real time, according to the invention.
- Fig. 4 shows the linearity of response and sensitivity of the radioluminescence dosimetry system, according to the invention.
- a real time radioluminescence dosimetry system comprises a radioluminescence dosimeter (110), a radiation hardened fiber (120), a radioluminescence reader (represented by a dotted box) and an output unit (170).
- the radioluminescence reader comprises of a cubic block in which a lens (140), a filter (150) are arranged and a photodetector (160) is attached to the cubic block on one side.
- the radioluminescence dosimeter (110) is connected to the photodetector (160) via the radiation hardened fiber (120) and the cubic block.
- the sensing material used for the radioluminescence dosimeter (110) is able to maintain constant level of intensity consistently at constant dose rate. Further, the intensity of radioluminescence signal is directly proportional to the changing dose rates.
- the radioluminescence signal emitted by the radioluminescence dosimeter (110), has a correlation with the received radiation dose and the absorbed dose is displayed by the output unit (170).
- the radioluminescence dosimetry system (100) is used to measure the dose rate (absorbed dose/time) of an ionizing radiation maintained with high spatial resolution (for point dose measurements) in real-time and is operable at different moisture, temperature and other conditions. Further, the radioluminescence system (100) is used to calculate the total absorbed dose from the real time data and display the current magnitude.
- the radioluminescence dosimeter (110) is a fabricated germanium doped silica fiber, acts as a sensor is fitted into a probe and placed on or in vivo in a specimen.
- the germanium doped silica fiber is aligned and attached to the radiation hardened fiber (120).
- the fabrication of the germanium doped silica fiber (110) is by using Modified Chemical Vapor Deposition (MCVD) technique to ensure and tuned for the emission of the radioluminescence signal with sufficient germanium doping.
- MCVD Modified Chemical Vapor Deposition
- the radiation hardened fiber (120) acts as the waveguide to guide the radioluminescence signal from the radioluminescence dosimeter (110) to the photodetector (160) via the cubic block.
- the cubic block is a light-tight housing which completely blocks any external light entering into it.
- the radiation hardened fiber (120) is connected to the cubic block via a suitable connector (130) based on the diameter of the fiber (120).
- the bandpass filter (150) filters the radioluminescence signal between two specific frequencies and eliminates noise and other spectra that are not necessary.
- the lens (140) used is a convex lens converges the incoming filtered radioluminescence signal towards the photodetector (160).
- the focal length of the lens (140) is selected according to the type of the photodetector (160) used and arrangement of the cubic block.
- the photodetector (160) is a photomultiplier tube, CCD or avalanche photodiode, captures the filtered radioluminescence signals to detect the photons. These radioluminescence signals are transmitted to signal processing device and converted into electrical signal. Further, includes a processor, which process the electrical signal to provide readings of the absorbed radiation dose rate by the specimen and is displayed on the output unit (170).
- the profile of the radioluminescence dosimeter probe or sensor (110) is a fabricated germanium doped silica fiber emits the radioluminescence signal upon exposure to the radiation.
- the radioluminescence dosimeter (110) is placed inside a black polymer capsule forming the probe.
- the diameter of the probe is chosen in accordance with the outer diameter of the radiation hardened fiber (120) so that the radioluminescence dosimeter (110) is aligned with the core of the radiation hardened fiber (120) and this enables to maintain spatial resolution of the radioluminescence signal.
- a light proof jacket made from opaque black colored tape is used to cover the coupling portion between the radioluminescence dosimeter (110) and end portion of the radiation hardened fiber (120) to hold them tightly aligned to each other and block any external light entering into the coupling junction.
- the radioluminescence dosimeter (110) is aligned with the core of the radiation hardened fiber (120) to ensure maximum radioluminescence signal transfer with spatial resolution.
- the fabricated germanium doped silica fiber is reusable.
- the response is consistent over the acquisition period of constant dose rate.
- the radioluminescence dosimeter (110) emits the radioluminescence signal over prolonged period of time and the intensity of the radio luminescence signal increases proportionally with the increasing dose rate.
- the intensity of the radioluminescence signal remains constant for a constant dose rates provided to the specimen.
- the sensitivity of the radioluminescence dosimeter (110) changes linearly with the varying dose rates.
- the radioluminescence dosimeter (110) emits radioluminescence signal with intensity which is linearly proportional to the radiation dose rates given to the specimen.
- the present invention also provides a method to calculate absorbed radiation dose using the real time radioluminescence dosimetry system (100) comprises steps: attach at least one radioluminescence dosimeter (110) to the specimen (example: patient's body), expose the specimen to the radiation from the radiation source, emits radioluminescence signal by the radioluminescence dosimeter (110) upon the exposure to the radiation due to emission of photons which is caused by energy transition in valence and conduction energy bands, guide the emitted radioluminescence signal using the radiation hardened fiber (120) to the photodetector (160), where the radioluminescence signal are filtered using the bandpass filter (150) and focused towards the photodetector (160) using the lens (140), process the radioluminescence signal using processer, and display the rate of the radiation absorption by the specimen on the output unit (170).
- the real time radioluminescence dosimetry system (100) finds its industrial applicability in radiotherapy in medical field and other related fields.
- the radioluminescence dosimeter (110) is attached to the patient's body exposed to the radiation and emits the radioluminescence signal. Emission of photons during exposure to the ionizing radiation is caused by energy transition in valence and conduction energy bands.
- the radioluminescence signals are acquired by the radioluminescence reader, processed by the processor and the real time response of the radioluminescence signal is displayed on the output unit (170).
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
A radioluminescence dosimetry system (100) comprises: a radioluminescence dosimeter (110), attached to a specimen exposed to radiation emitted from a radiation source, the radioluminescence dosimeter (110) emits radioluminescence signal upon exposure to the radiation; a radioluminescence reader, further comprises: a lens (140), to converge the radioluminescence signal towards a photodetector (160); a bandpass filter (150), to eliminate noise from the radioluminescence signal; and, the photodetector (160), to capture the filtered radioluminescence signal; and, an output unit (170), to display dose absorbed by a specimen attached to the radioluminescence dosimeter (110) based on the radioluminescence signal obtained from the photodetector (170). The radioluminescence signal emitted by the radioluminescence dosimeter (110) has constant intensity level for same dose rate and is linearly proportional to changes in the dose rate provided to the specimen, in order to calculate rate of the radiation absorption by the specimen in real time.
Description
REAL TIME RADIATION DOSIMETRY SYSTEM FIELD OF INVENTION
The invention generally relates to a radiation dosimetry, and more particularly it relates to a real time radiation dosimetry based on radioluminescence.
BACKGROUND OF THE INVENTION
Radiation levels are generally monitored by thermoluminescent phosphors, such as LiF (TLD- 100, TLD-600, TLD-700) and CaF2 (TLD-300, TLD-400). These materials are contained in TLD badges and exposed to radiation prone locations for duration ranging from minutes to months. Thermoluminescent phosphors generate free electrons during exposure to irradiation, which are trapped in the forbidden band gap as soon as the irradiation stops. These electrons are captured in traps between the valence and conduction band of the material. When heat is applied to the thermoluminescent phosphors, the electrons recombine at recombination centers emitting light. This light is proportional to the cumulative absorbed radiation dose. An alternative method to release such traps is by using light of appropriate wavelength (material dependent) instead of heat. This process is known as Optically Stimulated Luminescence (OSL).
The methods mentioned above are inherently off-line. Radiation can only be measured after the entire irradiation procedure. Therefore, existing luminescence based dose reading techniques are not suitable for real time dose measurements.
The present invention provides a real time radiation dosimetry system that can accomplish instant read out measurement of the absorbed radiation dose based on radioluminescence.
SUMMARY OF THE INVENTION
This invention provides a radioluminescence dosimetry system comprises: a radioluminescence dosimeter, attached to a specimen exposed to radiation emitted from a radiation source, the radioluminescence dosimeter emits radioluminescence signal when exposed to the radiation; a radioluminescence reader, further comprises: a lens, to converge the radioluminescence signal towards a photodetector; a bandpass filter, to eliminate noise from the radioluminescence signal; and, the photodetector, to capture the filtered radioluminescence signal; and, an output unit, to display absorbed dose by the specimen based on reading obtained from the photodetector. The radioluminescence signal emitted by the radioluminescence dosimeter has constant intensity level for consistent dose rate. The intensity is linearly proportional to changes in the dose rate provided to the specimen, in order to calculate rate of the radiation absorption by the specimen in real time.
Preferably, the radioluminescence dosimeter is a fabricated germanium-doped silica optical fiber.
Further, the dosimetry system includes a radiation hardened fiber to guide the radioluminescence signal from the radioluminescence dosimeter to the radioluminescence reader.
Preferably, the lens is a convex lens. Further, the radioluminescence dosimetry system includes a signal processor to analyze the radioluminescence signal received from the photodetector.
Preferably, the radioluminescence dosimetry system, is a real-time dosimetry system. Preferably, the radioluminescence dosimeter is reusable.
Preferably, the radiation hardened fiber enables the radioluminescence signal with
spatial resolution.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will now be described in greater detailed, by way of example, with reference to the accompanied drawings in which:
Fig. 1 shows the schematic of the real-time radioluminescence dosimeter system, according to the invention;
Fig. 2 shows the profile of the radioluminescence dosimeter and the radiation hardened fiber, according to the invention;
Fig. 3 shows the response of the radioluminescence dosimetry system in real time, according to the invention; and,
Fig. 4 shows the linearity of response and sensitivity of the radioluminescence dosimetry system, according to the invention. As shown in figure 1, is a real time radioluminescence dosimetry system (100) comprises a radioluminescence dosimeter (110), a radiation hardened fiber (120), a radioluminescence reader (represented by a dotted box) and an output unit (170). The radioluminescence reader comprises of a cubic block in which a lens (140), a filter (150) are arranged and a photodetector (160) is attached to the cubic block on one side. The radioluminescence dosimeter (110) is connected to the photodetector (160) via the radiation hardened fiber (120) and the cubic block. To facilitate reliable, fast and accurate readings in real time, the sensing material used for the radioluminescence dosimeter (110) is able to maintain constant level of intensity consistently at constant dose rate. Further, the intensity of radioluminescence signal is directly proportional to the changing dose rates. The radioluminescence signal emitted by the radioluminescence dosimeter (110), has a correlation with the received radiation dose and the absorbed dose is displayed by the output unit (170). The
radioluminescence dosimetry system (100) is used to measure the dose rate (absorbed dose/time) of an ionizing radiation maintained with high spatial resolution (for point dose measurements) in real-time and is operable at different moisture, temperature and other conditions. Further, the radioluminescence system (100) is used to calculate the total absorbed dose from the real time data and display the current magnitude.
The radioluminescence dosimeter (110), is a fabricated germanium doped silica fiber, acts as a sensor is fitted into a probe and placed on or in vivo in a specimen. The germanium doped silica fiber is aligned and attached to the radiation hardened fiber (120). Further, the fabrication of the germanium doped silica fiber (110) is by using Modified Chemical Vapor Deposition (MCVD) technique to ensure and tuned for the emission of the radioluminescence signal with sufficient germanium doping. When the specimen is exposed to the radiation, the radioluminescence dosimeter (110) attached to the specimen absorbs the radiation that subsequently leads to the emission of the radioluminescence signal, which is proportional to the cumulative absorbed radiation dose rate by the specimen.
The radiation hardened fiber (120) acts as the waveguide to guide the radioluminescence signal from the radioluminescence dosimeter (110) to the photodetector (160) via the cubic block. The cubic block is a light-tight housing which completely blocks any external light entering into it. The radiation hardened fiber (120) is connected to the cubic block via a suitable connector (130) based on the diameter of the fiber (120). The bandpass filter (150), filters the radioluminescence signal between two specific frequencies and eliminates noise and other spectra that are not necessary. The lens (140) used is a convex lens converges the incoming filtered radioluminescence signal towards the photodetector (160). The focal length of the lens (140) is selected according to the type of the photodetector (160) used and arrangement of the cubic block. The photodetector (160), is a photomultiplier tube, CCD or avalanche photodiode, captures the filtered radioluminescence signals to detect the photons. These radioluminescence signals are transmitted to signal processing device and converted into electrical signal. Further, includes a processor, which process the electrical signal to provide readings of the absorbed radiation dose
rate by the specimen and is displayed on the output unit (170).
As shown in figure 2, the profile of the radioluminescence dosimeter probe or sensor (110), is a fabricated germanium doped silica fiber emits the radioluminescence signal upon exposure to the radiation. The radioluminescence dosimeter (110) is placed inside a black polymer capsule forming the probe. The diameter of the probe is chosen in accordance with the outer diameter of the radiation hardened fiber (120) so that the radioluminescence dosimeter (110) is aligned with the core of the radiation hardened fiber (120) and this enables to maintain spatial resolution of the radioluminescence signal. Further referring to the figure 2, a light proof jacket made from opaque black colored tape is used to cover the coupling portion between the radioluminescence dosimeter (110) and end portion of the radiation hardened fiber (120) to hold them tightly aligned to each other and block any external light entering into the coupling junction. The radioluminescence dosimeter (110) is aligned with the core of the radiation hardened fiber (120) to ensure maximum radioluminescence signal transfer with spatial resolution. The fabricated germanium doped silica fiber is reusable.
Referring to figure 3, a graph for the real time response of the radioluminescence signal produced by the real time radioluminescence dosimetry system (100). The response is consistent over the acquisition period of constant dose rate. The radioluminescence dosimeter (110) emits the radioluminescence signal over prolonged period of time and the intensity of the radio luminescence signal increases proportionally with the increasing dose rate. The intensity of the radioluminescence signal remains constant for a constant dose rates provided to the specimen.
Referring to figure 4, the sensitivity of the radioluminescence dosimeter (110) changes linearly with the varying dose rates. The radioluminescence dosimeter (110) emits radioluminescence signal with intensity which is linearly proportional to the radiation dose rates given to the specimen.
The present invention also provides a method to calculate absorbed radiation dose using the real time radioluminescence dosimetry system (100) comprises steps: attach
at least one radioluminescence dosimeter (110) to the specimen (example: patient's body), expose the specimen to the radiation from the radiation source, emits radioluminescence signal by the radioluminescence dosimeter (110) upon the exposure to the radiation due to emission of photons which is caused by energy transition in valence and conduction energy bands, guide the emitted radioluminescence signal using the radiation hardened fiber (120) to the photodetector (160), where the radioluminescence signal are filtered using the bandpass filter (150) and focused towards the photodetector (160) using the lens (140), process the radioluminescence signal using processer, and display the rate of the radiation absorption by the specimen on the output unit (170).
The real time radioluminescence dosimetry system (100) finds its industrial applicability in radiotherapy in medical field and other related fields. The radioluminescence dosimeter (110) is attached to the patient's body exposed to the radiation and emits the radioluminescence signal. Emission of photons during exposure to the ionizing radiation is caused by energy transition in valence and conduction energy bands. The radioluminescence signals are acquired by the radioluminescence reader, processed by the processor and the real time response of the radioluminescence signal is displayed on the output unit (170).
Claims
A radioluminescence dosimetry system (100) comprising:
a radioluminescence dosimeter (110), exposed to radiation emitted from a radiation source, wherein the radioluminescence dosimeter (110) emits radioluminescence signal upon exposure to the radiation;
a radioluminescence reader, further comprising:
a bandpass filter (150), for eliminating noise from the radioluminescence signal; and
a lens (140), for focusing the filtered radioluminescence signal towards a photodetector (160) to capture the filtered radioluminescence signal; and,
an output unit (170), for displaying the dose absorbed by a specimen attached to the radioluminescence dosimeter (110) based on the radioluminescence signal obtained from the photodetector (160),
characterized in that, the radioluminescence signal emitted by the radioluminescence dosimeter (110) has constant intensity level for consistent dose rate and is linearly proportional to changes in the dose rate provided to the specimen, in order to calculate radiation absorption by the specimen in real time.
A radioluminescence dosimetry system (100) according to claim 1, wherein the radioluminescence dosimeter (110) is a fabricated germanium-doped silica optical fiber (110).
A radioluminescence dosimetry system (100) according to claims 1 or 2, further includes a radiation hardened fiber (120) for passing the radioluminescence signal from the radioluminescence dosimeter (110) to the radioluminescence reader.
A radioluminescence dosimetry system (100) according to any of claims 1 to 3, wherein the lens (140) is a convex lens.
5. A radioluminescence dosimetry system (100) according to claim 1, further comprising a signal processor for analyzing the radioluminescence signal.
6. A radioluminescence dosimetry system (100) according to any of preceding claims, is a real-time dosimetry system.
7. A radioluminescence dosimetry system (100) according to any of preceding claims, wherein the radioluminescence dosimeter (110) is reusable.
8. A radioluminescence dosimetry system (100) according to any of preceding claims, wherein the radiation hardened fiber (120) enables to maintain the radioluminescence signal with spatial resolution.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI2016704886A MY178849A (en) | 2016-12-29 | 2016-12-29 | Real time radiation dosimetry system |
| MYPI2016704886 | 2016-12-29 |
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| Publication Number | Publication Date |
|---|---|
| WO2018124874A1 true WO2018124874A1 (en) | 2018-07-05 |
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ID=62710649
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/MY2017/050085 WO2018124874A1 (en) | 2016-12-29 | 2017-12-27 | Real time radiation dosimetry system |
Country Status (2)
| Country | Link |
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| MY (1) | MY178849A (en) |
| WO (1) | WO2018124874A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3653262A1 (en) * | 2018-11-16 | 2020-05-20 | Sck Cen | Determination of radiation dosimetry |
| CN113260878A (en) * | 2018-12-21 | 2021-08-13 | 皇家学术促进会/麦吉尔大学 | Dosimeter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4258264A (en) * | 1978-07-12 | 1981-03-24 | Fuji Photo Film Co., Ltd. | Method of and apparatus for reading out a radiation image recorded in a stimulable phosphor |
| US20130248721A1 (en) * | 2010-09-17 | 2013-09-26 | Grand Victor McLelland Williams | Radiation Dosimeter Detection System and Method |
-
2016
- 2016-12-29 MY MYPI2016704886A patent/MY178849A/en unknown
-
2017
- 2017-12-27 WO PCT/MY2017/050085 patent/WO2018124874A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4258264A (en) * | 1978-07-12 | 1981-03-24 | Fuji Photo Film Co., Ltd. | Method of and apparatus for reading out a radiation image recorded in a stimulable phosphor |
| US20130248721A1 (en) * | 2010-09-17 | 2013-09-26 | Grand Victor McLelland Williams | Radiation Dosimeter Detection System and Method |
Non-Patent Citations (3)
| Title |
|---|
| CHIODINI, N. ET AL.: "Rare earth doped silica optical fibre sensors for dosimetry in medical and technical applications", ADVANCES IN OPTICS, vol. 2014, 14 October 2014 (2014-10-14), pages 1 - 9, XP055516958 * |
| RAHMAN, AKM MIZANUR ET AL.: "German ium-doped optical fiber for real-time radiation dosimetry", RADIATION PHYSICS AND CHEMISTRY, vol. 116, 2015, pages 170 - 175, XP029278400 * |
| RAHMAN, AKM MIZANUR ET AL.: "Real-time dosimetry in radiotherapy using tailored optical fibers", RADIATION PHYSICS AND CHEMISTRY, vol. 122, May 2016 (2016-05-01), pages 43 - 47, XP055516955 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3653262A1 (en) * | 2018-11-16 | 2020-05-20 | Sck Cen | Determination of radiation dosimetry |
| JP2020081874A (en) * | 2018-11-16 | 2020-06-04 | エスセーカー・セーエーエヌＳｃｋ．Ｃｅｎ | Determination of radiation dose measurement |
| US11300690B2 (en) | 2018-11-16 | 2022-04-12 | Sck-Cen | Determination of radiation dosimetry |
| JP7471800B2 (en) | 2018-11-16 | 2024-04-22 | エスセーカー・セーエーエヌ | Radiation measurement judgment |
| CN113260878A (en) * | 2018-12-21 | 2021-08-13 | 皇家学术促进会/麦吉尔大学 | Dosimeter |
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| Publication number | Publication date |
|---|---|
| MY178849A (en) | 2020-10-21 |
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