An investigation of the thermoluminescence of Ge-doped SiO2 optical fibres for application in interface radiation dosimetry

Rahman, Ahmad Taufek Abdul; Hugtenburg, Richard P.; Sani, S.F. Abdul; Alalawi, Amani; Issa, Fatma; Thomas, R.; Barry, M; Nisbet, Andrew; Bradley, D.A.

doi:10.1016/j.apradiso.2011.11.030

Cited by 31 publications

(3 citation statements)

References 14 publications

(17 reference statements)

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“…A mixture of concentrated nitric acid and concentrated hydrochloric acid at a ratio of 1:3 was used for gold removal from the fiber optics [25].…”

Section: H Gold Etchingmentioning

confidence: 99%

Improved Dosimetry in Radiotherapy with Gold-Coated Fiber Optics

Mohammed,

Said,

Mohammed

2024

Preprint

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Background: Patients receiving radiotherapy, a clinical treatment process in which radiation ‎is used for the treatment of various types of cancer, utilize a variety of radiation sources with ‎unique characteristics and procedures. In vivo dose measurements can help identify systematic ‎and random errors in delivery of the treatment and therefore play an important role in quality ‎assurance. Recently, the photon response of optical fibers has been investigated by many research ‎groups. The small diameters of optical fibers increase the possibility of producing a dosimeter ‎with high spatial resolution, important in the sense that an accurate value for the absorbed dose in ‎the surrounding tissue of the dosimeter can be more accurately reported. Another important ‎advantage of optical fibers as radiation dosimeters is that, unlike conventional TLDs, optical ‎fibers are impervious to water. The aim of this study is to verify the dosimetric use of fiber ‎optics in interface dosimetry and to investigate a novel enhanced dose technique using different ‎gold thicknesses as a coating for fiber optics.‎ Methods: To achieve this goal, commercially available Ge-doped SiO2 optical fibers (Cor Active, ‎Canada) with a core diameter of 50.9 ± 4.1 µm were irradiated using a 250 kVp superficial X-ray ‎machine and a dose of 3 Gy. Before irradiation, fiber optics were prepared, and the following ‎steps, preheat annealing and reading, were performed.‎ Results: The results show enhancement with increasing gold (Au) thickness, with the highest ‎percentage dose enhancement of approximately 160% obtained at 80 nm. A slight deviation from ‎the enhancement was obtained at 20 nm, the first thickness of gold. Encouraging results from ‎such studies have paved the way for the development of optical fiber radiation dosimeters ‎specifically tailored to the task of dosimetry in radiotherapy.‎ ‎ Conclusion: An optical fiber dosimeter can be placed within the tissue of interest, which is ‎applicable due to its flexibility.‎

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“…A mixture of concentrated nitric acid and concentrated hydrochloric acid at a ratio of 1:3 was used for gold removal from the fiber optics [25].…”

Section: H Gold Etchingmentioning

confidence: 99%

Improved Dosimetry in Radiotherapy with Gold-Coated Fiber Optics

Mohammed,

Said,

Mohammed

2024

Preprint

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“…Prostate cancer is the second most frequently diagnosed cancer and the sixth leading cause of cancer death in males, accounting for 14 % (903, 500) of the total new cancer cases and 6 % (258, 400) of the total cancer deaths in males in 2008 (Jemal et al 2011 ). Radical prostatectomy, external photon beam irradiation, and brachytherapy implantation are the usual methods for treating carcinoma of the prostate.…”

Section: Introductionmentioning

confidence: 99%

Optical fibre sensors: their role in in vivo dosimetry for prostate cancer radiotherapy

2016

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Review is made of dosimetric studies of current optical fibre technology in radiotherapy for therapeutic applications, focusing particularly on in vivo dosimetry for prostate radiotherapy. We present the various sensor designs along with the main advantages and disadvantages associated with this technology. Optical fibres are ideally placed for applications in radiotherapy dosimetry; due to their small size they are lightweight and immune to electromagnetic interferences. The small dimensions of optical fibres allows it to be easily guided within existing brachytherapy equipment; for example, within the seed implantation needle for direct tumour dose analysis, in the urinary catheter to monitor urethral dose, or within the biopsy needle holder of the transrectal ultrasound probe to monitor rectal wall dose. The article presents the range of optical fibre dosimeter designs along with the main dosimetric properties required for a modern in vivo dosimetry system to be utilised in a clinical environment.

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“…Oxide compositions of silicon are widely used in electronics, radiation technology and radiochemical processes [ 1 , 2 , 5 , 9 , 10 ]. Conversion of ionizing radiation energy and transfer to surface levels is of great importance for radiative study of materials and radiation technology.…”

Section: Introductionmentioning

confidence: 99%

Study of blend composition of nano silica under the influence of neutron flux

2014

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Nano SiO 2 compound with 160 m 2 /g specific surface area and 20 nm sizes has been irradiated continuously with neutron flux up to 20 hours in various periods in TRIGA Mark II type research reactor. The initial activities of different type radionuclides defined in the result of eight day activity analysis changes between wide range of 1,5 kBq-1,5GBq. In the result of activity analysis carried out after the irradiation, the element content of 0,5% mixture existing in nano SiO 2 compound has been defined with radionuclides of relevant element. It has been defined percentage amounts of elements in blend composition according to the performed activities.

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An investigation of the thermoluminescence of Ge-doped SiO2 optical fibres for application in interface radiation dosimetry

Cited by 31 publications

References 14 publications

Improved Dosimetry in Radiotherapy with Gold-Coated Fiber Optics

Improved Dosimetry in Radiotherapy with Gold-Coated Fiber Optics

Optical fibre sensors: their role in in vivo dosimetry for prostate cancer radiotherapy

Study of blend composition of nano silica under the influence of neutron flux

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