Radioluminescence sensing of radiology exposures using P-doped silica optical fibres


Bradley, D. A. and Zubair, H. T. and Oresegun, Adebiyi and Louay, G. T. and Ariffin, Alawiah and Khandaker, Mayeen Uddin and Alzimami, Khalid S. and Abdul Rashid, Hairul Azhar (2018) Radioluminescence sensing of radiology exposures using P-doped silica optical fibres. Applied Radiation and Isotopes, 141. pp. 176-181. ISSN 0969-8043

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In previous work we investigated the real-time radioluminescence (RL) yield of Ge-doped silica fibres and Al2O3 nanodot media, sensing electron- and x-ray energies and intensities at values familiarly obtained in external beam radiotherapy. The observation of an appreciable low-dose sensitivity has given rise to the realisation that there is strong potential for use of RL dosimetry in diagnostic radiology. Herein use has been made of P-doped silica optical fibre, 2 mm diameter, also including a 271 µm cylindrical doped core. With developing needs for versatile x-ray imaging dosimetry, preliminary investigations have been made covering the range of diagnostic x-ray tube potentials 30 kVp to 120 kVp, demonstrating linearity of RL with kVp as well as in terms of the current-time (mAs) product. RL yields also accord with the inverse-square law. Given typical radiographic-examination exposure durations from tens- to a few hundred milliseconds, particular value is found in the ability to record the influence of x-ray generator performance on the growth and decay of beam intensity, from initiation to termination.

Item Type: Article
Uncontrolled Keywords: Radioluminescence dosimetry, P-doped silica, fast-timing, diagnostic radiology, Optical fibers
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK8300-8360 Photoelectronic devices (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 16 Mar 2021 01:03
Last Modified: 16 Mar 2021 01:03


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