Radioluminescence of silica optical fibre scintillators for real-time industrial radiation dosimetry

Oresegun, Adebiyi; Basaif, A.; Tarif, Zubair H.; Abdul-Rashid, H.A.; Hashim, S. A.; Bradley, D.A.

doi:10.1016/j.radphyschem.2021.109684

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…Currently, while the investigation described in this article is limited to working with clinical linacs at conventional dose rates, the radioluminescence (RL) based optical ber-based dosimetry system previously developed by the authors of this article offers great potential for real-time detection of doserate errors, a prime objective of this investigation 12,13 . A continuous dose-delivery 1 MeV electron beam industrial irradiator has previously been used to demonstrate the resilience of optical ber sensors against irradiation damage, handling doses of up to 70 kGy 14 as well as their ability to handle an elevated dose per pulse. The durability of such sensing devices in monitoring high dose FLASH operations is an important design consideration.…”

Section: Introductionmentioning

confidence: 99%

The high dose rate sensing potential of a radiotherapy optical fiber dosimeter

Basaif¹,

Oresegun²,

Tarif³

et al. 2023

Preprint

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A perceived need exists for real-time dosimeters offering pulse-by-pulse temporal resolution to validate the delivery of the prescribed dose from clinical electron linear accelerators (linacs). In the case of linacs working at conventional (100–600 cGy/min) dose rates and operating in the bremsstrahlung mode, radioluminescence-emitting Ge-doped silica optical fibers have been shown to satisfy such demand. Ge-doped silica optical fiber scintillators measurements are made for a linac operating in the electron mode, delivering at dose rates up to 600 cGy/min. The radioluminescence response of the material as a function of dose has been measured using a Photomultiplier Tube (PMT) with a photon-counting circuit capable of 1-200 µs gating time, demonstrating dose linearity (R2 = 0.99971). Time-resolved radiation dosimetry measurements for a wide range of electron beam energies (6, 9, 12, 15 and 18 MeV) are reported. Measurements using a Multi Pixel Photon Counter (MPPC) connected to an oscilloscope shows the absence of saturation in the time resolved signal, freedom from performance limitations of residual memory or afterglow effects. Individual pulses at different energies have been analysed in terms of rise- and decay-times. While obtaining a qualitative assessment of the variation in pulse sub-structure, the variations likely arising from internal pulse manipulation for handling linac power delivery. The results point not only to the use of Ge-doped optical fiber scintillator in time-resolved dosimetry at conventional dose rates but also potential for use at the greater dose-rates of FLASH radiotherapy.

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Section: Introductionmentioning

confidence: 99%

The high dose rate sensing potential of a radiotherapy optical fiber dosimeter

Basaif¹,

Oresegun²,

Tarif³

et al. 2023

Preprint

Self Cite

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“…The probes are potentially highly cost effective and could be used in in-vivo experiments as disposable items. Furthermore, the use of silica fibers as light guides renders robust optical signal transmission that is not sensitive to electromagnetic fields and could be integrated in an MRI environment [9,10].…”

Section: Introductionmentioning

confidence: 99%

Spectral fiber dosimetry with beryllium oxide for quality assurance in hadron radiation therapy

et al. 2022

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Using the radioluminescence light of solid state probes coupled to long and flexible fibers for dosimetry in radiotherapy offers many advantages in terms of probe size, robustness and cost efficiency. However, especially in hadron fields, radioluminophores exhibit quenching effects dependent on the linear energy transfer. This work describes the discovery of a spectral shift in the radioluminescence light of beryllium oxide in dependence on the residual range at therapeutic proton energies. A spectrally resolving measurement setup has been developed and tested in scanned proton fields. It is shown that such a system can not only quantitatively reconstruct the dose, but might also give information on the residual proton range at the point of measurement.

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Radiation Sensors

Abdelnour

2023

Handbook of Nanosensors

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Radioluminescence of silica optical fibre scintillators for real-time industrial radiation dosimetry

Cited by 9 publications

References 30 publications

The high dose rate sensing potential of a radiotherapy optical fiber dosimeter

The high dose rate sensing potential of a radiotherapy optical fiber dosimeter

Spectral fiber dosimetry with beryllium oxide for quality assurance in hadron radiation therapy

Radiation Sensors

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