Simultaneous measurements of pure scintillation and Cerenkov signals in an integrated fiber-optic dosimeter for electron beam therapy dosimetry

Yoo, Wook Jae; Shin, Sang Hun; Jeon, Dasom; Hong, Seoung‐Jin; Kim, Seon Geun; Sim, Hyeok In; Jang, Kyoung Won; Cho, Seung-Hyun; Lee, Bongsoo

doi:10.1364/oe.21.027770

Cited by 30 publications

(18 citation statements)

References 16 publications

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“…Here, the results were obtained by subtracting the light output of the optical fiber for transmission from those of FOCRSs. Typically, transmitted amount of Cerenkov radiation in a POF depends on the incident angle of electron and has a peak when the incident angle of electron is the same as the emission angle of Cerenkov radiation [16]. In our experiment, transmitted amount of Cerenkov radiation in the POF had a peak at the irradiation angle of 40°; this value is close to the theoretical Cerenkov emission angle for 570 keV electrons in the PS.…”

Section: Resultssupporting

confidence: 80%

Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber

Jang

Shin

Kim

et al. 2014

Sensors

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In this study, a wavelength shifting fiber that shifts ultra-violet and blue light to green light was employed as a sensor probe of a fiber-optic Cerenkov radiation sensor. In order to characterize Cerenkov radiation generated in the developed wavelength shifting fiber and a plastic optical fiber, spectra and intensities of Cerenkov radiation were measured with a spectrometer. The spectral peaks of light outputs from the wavelength shifting fiber and the plastic optical fiber were measured at wavelengths of 500 and 510 nm, respectively, and the intensity of transmitted light output of the wavelength shifting fiber was 22.2 times higher than that of the plastic optical fiber. Also, electron fluxes and total energy depositions of gamma-ray beams generated from a Co-60 therapy unit were calculated according to water depths using the Monte Carlo N-particle transport code. The relationship between the fluxes of electrons over the Cerenkov threshold energy and the energy depositions of gamma-ray beams from the Co-60 unit is a near-identity function. Finally, percentage depth doses for the gamma-ray beams were obtained using the fiber-optic Cerenkov radiation sensor, and the results were compared with those obtained by an ionization chamber. The average dose difference between the results of the fiber-optic Cerenkov radiation sensor and those of the ionization chamber was about 2.09%.

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Section: Resultssupporting

confidence: 80%

Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber

Jang

Shin

Kim

et al. 2014

Sensors

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“…The sensing probe of the CFOD is composed of two identical POFs with different lengths to measure Cerenkov radiation [9]. The length difference of two POFs (i.e., probes 1 and 2) is 10 mm to apply the subtraction method, as shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Comparison of Depth Dose Distributions Using Cerenkov Fiber-Optic Dosimeter and Monte Carlo Simulation for HDR Brachytherapy

Shin¹,

Song²,

Kim³

et al. 2016

JAMP

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In this study, we fabricated a Cerenkov fiber-optic dosimeter (CFOD) without any scintillator to measure Cerenkov radiation signals owing to gamma-rays. The relative depth dose (RDD) distributions of Ir-192 HDR brachytherapy source were obtained by using the CFOD based on a subtraction method and the RDD curve was compared with the simulation result of Monte Carlo N-particle extended transport code (MCNPX). Finally, we demonstrated that the CFOD can be used to measure real-time dose information for HDR brachytherapy.

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“…Besides HEP experiments, dual readout is involved in several other fields. Dual Cherenkov and scintillation readout has also been proposed for calibration and monitoring of high-energy-electron-beam profiles in radiotherapy and for the optical imaging of ionizing radiation in the clinical field [14,15]; in addition, it can be used for applications in security, industrial x-ray imaging, and radiography [16,17]. Furthermore, dual readout can be exploited to probe the transport of energetic solar particles, allowing coverage of the energy range from tens to hundreds of MeV with a single detector [18].…”

Section: Introductionmentioning

confidence: 99%

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

et al. 2019

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The investigation of the characteristic luminescent response of Ce-doped silica fibers exposed to electrons in the 20-200-GeV energy range is reported in this work to explore the feasibility of using silica-based fibers for a simultaneous dual-readout approach. The sol-gel method allows the preparation of either doped or undoped fibers with high aspect ratio and high purity, providing good flexibility and spatial resolution for the realization of a dual-readout detector. The dual Cherenkov and scintillation light emitted by silica-based fibers potentially offers applications in high-energy-physics calorimetry as well as in other fields, such as radiation monitoring in medicine, security, and industrial control. The response of the fibers, embedded in a tungsten-copper absorber block to obtain a spaghetti-like geometry in a high-energyphysics environment, is investigated through a test-beam campaign at the CERN Super Proton Synchrotron facility. The discrimination of Cherenkov and scintillation light is demonstrated and discussed, along with a detailed investigation of the scintillation properties of the material: time-resolved spectroscopy, relative light output, and attenuation length are evaluated. The results presented in this study can pave the way for further material engineering and future applications.

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Simultaneous measurements of pure scintillation and Cerenkov signals in an integrated fiber-optic dosimeter for electron beam therapy dosimetry

Cited by 30 publications

References 16 publications

Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber

Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber

Comparison of Depth Dose Distributions Using Cerenkov Fiber-Optic Dosimeter and Monte Carlo Simulation for HDR Brachytherapy

Dual Cherenkov and Scintillation Response to High-Energy Electrons of Rare-Earth-Doped Silica Fibers

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