Optical Filter-Embedded Fiber-Optic Radiation Sensor for Ultra-High Dose Rate Electron Beam Dosimetry

FLASH radiotherapy is an emerging radiotherapy technique used to spare normal tissues. It employs ultra-high dose rate radiation beams over 40 Gy/s, which is significantly higher than those of conventional radiotherapy. In this study, a fiber-optic radiation sensor (FORS) was fabricated using a plastic scintillator, an optical filter, and a plastic optical fiber to measure the ultra-high dose rate electron beams over 40 Gy/s used in FLASH radiotherapy. The radiation-induced emissions, such as Cherenkov radiation and fluorescence generated in a transmitting optical fiber, were spectrally discriminated from the light outputs of the FORS. To evaluate the linearity and dose rate dependence of the FORS, the outputs of the fiber-optic radiation sensor were measured according to distances from an electron scattering device, and the results were compared with those of an ionization chamber and radiochromic films. Finally, the percentage depth doses were obtained using the FORS as a function of depth in a water phantom. This study found that ultra-high dose rate electron beams over 40 Gy/s could be measured in real time using a FORS.

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Development of an All-in-One Phantom and Scintillator Radiation Sensor for Real-Time Monitoring of Source Position and Dose Distribution in High-Dose-Rate Brachytherapy

Sensors and Materials ◽

10.18494/sam.2016.1216 ◽

2016 ◽

Keyword(s):

Dose Rate ◽

Real Time ◽

Dose Distribution ◽

High Dose Rate ◽

High Dose ◽

Source Position ◽

Real Time Monitoring ◽

High Dose Rate Brachytherapy ◽

Radiation Sensor

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The challenge of ionisation chamber dosimetry in ultra-short pulsed high dose-rate Very High Energy Electron beams

Scientific Reports ◽

10.1038/s41598-020-65819-y ◽

2020 ◽

Vol 10 (1) ◽

Cited By ~ 6

Author(s):

M. McManus ◽

F. Romano ◽

N. D. Lee ◽

W. Farabolini ◽

A. Gilardi ◽

...

Keyword(s):

Dose Rate ◽

Electron Beams ◽

High Energy ◽

High Dose Rate ◽

Energy Electron ◽

High Dose ◽

High Energy Electron ◽

Ionisation Chamber ◽

Very High Energy ◽

Very High

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Radiobiological characterization of the very high dose rate and dose per pulse electron beams produced by an IORT (intra operative radiation therapy) dedicated linac

Translational Cancer Research ◽

10.21037/tcr.2017.05.21 ◽

2017 ◽

Vol 6 (S5) ◽

pp. S761-S768 ◽

Cited By ~ 1

Author(s):

Paola Scampoli ◽

Carmela Carpentieri ◽

Marco Giannelli ◽

Vera Magaddino ◽

Lorenzo Manti ◽

...

Keyword(s):

Radiation Therapy ◽

Dose Rate ◽

Electron Beams ◽

High Dose Rate ◽

High Dose ◽

Pulse Electron ◽

Very High

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Evaluation of the Detection Efficiency of LYSO Scintillator in the Fiber-Optic Radiation Sensor

Science and Technology of Nuclear Installations ◽

10.1155/2014/248403 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 4

Author(s):

Chan Hee Park ◽

Arim Lee ◽

Rinah Kim ◽

Joo Hyun Moon

Keyword(s):

Optical Fiber ◽

Optical Fibers ◽

Fiber Optic ◽

Detection Efficiency ◽

Radiation Detection ◽

Refraction Index ◽

Fiber Optic Sensor ◽

Optic Radiation ◽

Spent Fuel ◽

Radiation Sensor

The aim of this study was to develop and evaluate fiber-optic sensors for the remote detection of gamma rays in areas that are difficult to access, such as a spent fuel pool. The fiber-optic sensor consists of a light-generating probe, such as scintillators for radiation detection, plastic optical fibers, and light-measuring devices, such as PMT. The (Lu,Y)2SiO5:Ce(LYSO:Ce) scintillator was chosen as the light-generating probe. The (Lu,Y)2SiO5:Ce(LYSO:Ce) scintillator has higher scintillation efficiency than the others and transmits light well through an optical fiber because its refraction index is similar to the refractive index of the optical fiber. The fiber-optic radiation sensor using the (Lu,Y)2SiO5:Ce(LYSO:Ce) scintillator was evaluated in terms of the detection efficiency and reproducibility for examining its applicability as a radiation sensor.

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Optically Stimulated Luminescence Analysis Method for High Dose Rate Using an Optical Fiber Type Dosimeter

IEEE Transactions on Nuclear Science ◽

10.1109/tns.2016.2570899 ◽

2016 ◽

Vol 63 (4) ◽

pp. 2262-2270 ◽

Cited By ~ 4

Author(s):

Katsunori Ueno ◽

Kazuo Tominaga ◽

Takahiro Tadokoro ◽

Koji Ishizawa ◽

Yoshinori Takahashi ◽

...

Keyword(s):

Optical Fiber ◽

Dose Rate ◽

Fiber Type ◽

High Dose Rate ◽

Optically Stimulated Luminescence ◽

High Dose ◽

Analysis Method ◽

Luminescence Analysis

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Radiobiology Experiments With Ultra-high Dose Rate Laser-Driven Protons: Methodology and State-of-the-Art

Frontiers in Physics ◽

10.3389/fphy.2021.624963 ◽

2021 ◽

Vol 9 ◽

Author(s):

Pankaj Chaudhary ◽

Giuliana Milluzzo ◽

Hamad Ahmed ◽

Boris Odlozilik ◽

Aaron McMurray ◽

...

Keyword(s):

Dose Rate ◽

Biological Effects ◽

Therapeutic Index ◽

High Dose Rate ◽

High Dose ◽

Particle Accelerators ◽

Dose Rates ◽

Normal Tissues ◽

Multiple Pulses ◽

Tissue Sparing

The use of particle accelerators in radiotherapy has significantly changed the therapeutic outcomes for many types of solid tumours. In particular, protons are well known for sparing normal tissues and increasing the overall therapeutic index. Recent studies show that normal tissue sparing can be further enhanced through proton delivery at 100 Gy/s and above, in the so-called FLASH regime. This has generated very significant interest in assessing the biological effects of proton pulses delivered at very high dose rates. Laser-accelerated proton beams have unique temporal emission properties, which can be exploited to deliver Gy level doses in single or multiple pulses at dose rates exceeding by many orders of magnitude those currently used in FLASH approaches. An extensive investigation of the radiobiology of laser-driven protons is therefore not only necessary for future clinical application, but also offers the opportunity of accessing yet untested regimes of radiobiology. This paper provides an updated review of the recent progress achieved in ultra-high dose rate radiobiology experiments employing laser-driven protons, including a brief discussion of the relevant methodology and dosimetry approaches.

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Feasibility Study of the One-Dimensional Radiation Distribution Sensing Method Using an Optical Fiber Sensor Based on Wavelength Spectrum Unfolding

Journal of Nuclear Engineering and Radiation Science ◽

10.1115/1.4048841 ◽

2020 ◽

Author(s):

Yuta Terasaka ◽

Kenichi Watanabe ◽

Akira Uritani ◽

Atsushi Yamazaki ◽

Yuki Sato ◽

...

Keyword(s):

Optical Fiber ◽

Dose Rate ◽

Optical Fiber Sensor ◽

High Dose Rate ◽

Fiber Sensor ◽

High Dose ◽

One Dimensional ◽

Position Detection ◽

Spectrum Unfolding ◽

Radiation Distribution

Abstract We propose a novel one-dimensional radiation distribution sensing method using an optical fiber sensor based on wavelength spectrum unfolding for the application in the measurement of the high dose rate hot spots inside the Fukushima Daiichi Nuclear Power Station (FDNPS) buildings. The proposed method estimates the incident position of radiation to the fiber by the unfolding of wavelength spectrum output from the fiber edge on the premise that the attenuation length of light along the fiber depends on a wavelength. Because this method measures integrated light intensity, it can avoid the problem of counting loss and signal pile-up, which occurs in a radiation detector with the pulse counting mode under the high dose rate field. Basic properties of source position detection were confirmed through basic experiments using an ultraviolet light source and 90Sr/90Y radioactive point source.

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