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Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters

The use of Al2O3:C-based optically stimulated luminescent dosimeters (OSLDs) in diagnostic X-ray is a challenge because of their energy dependence (ED) and variability of element sensitivity factors (ESFs). This study aims to develop a method to determine ED and ESFs of Landauer nanoDot (TM) OSLDs f...

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Main Authors: Wong, Jeannie Hsiu Ding, Ismail, Wan Hazlinda
Format: Article
Published: Springer 2024
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R Medicine (General)
Online Access:http://eprints.um.edu.my/47008/
https://doi.org/10.1007/s13246-024-01407-y
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spelling my.um.eprints.470082025-01-08T08:32:39Z http://eprints.um.edu.my/47008/ Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters Wong, Jeannie Hsiu Ding Ismail, Wan Hazlinda R Medicine (General) The use of Al2O3:C-based optically stimulated luminescent dosimeters (OSLDs) in diagnostic X-ray is a challenge because of their energy dependence (ED) and variability of element sensitivity factors (ESFs). This study aims to develop a method to determine ED and ESFs of Landauer nanoDot (TM) OSLDs for clinical X-ray and investigate the uncertainties associated with ESF and ED correction factors. An area of 2 x 2 cm(2) at the central axis of the X-ray field was used to establish the ESFs. A total of 80 OSLDs were categorized into ``controlled'' (n = 40) and ``less-controlled'' groups (n = 40). The ESFs of the OSLDs were determined using an 80 kVp X-ray beam quality in free-air geometry. The OSLDs were cross-calibrated with an ion chamber to establish the average calibration coefficient and ESFs. The OSLDs were then irradiated at tube potentials ranging from 50 to 150 kVp to determine their ED. The uniformity of the X-ray field was +/- 1.5% at 100 cm source-to-surface distance. The batch homogeneities of user-defined ESFs were 2.4% and 8.7% for controlled and less-controlled OSLDs, respectively. The ED of OSLDs ranged from 1.125 to 0.812 as tube potential increased from 50 kVp to 150 kVp. The total uncertainty of OSLDs, without ED correction, could be as high as 16%. After applying ESF and ED correction, the total uncertainties were reduced to 6.3% in controlled OLSDs and 11.6% in less-controlled ones. OSLDs corrected with user-defined ESF and ED can reduce the uncertainty of dose measurements in diagnostic X-rays, particularly in managing less-controlled OSLDs. Springer 2024-09 Article PeerReviewed Wong, Jeannie Hsiu Ding and Ismail, Wan Hazlinda (2024) Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters. Physical and Engineering Sciences in Medicine, 47 (3). pp. 821-832. ISSN 2662-4729, DOI https://doi.org/10.1007/s13246-024-01407-y <https://doi.org/10.1007/s13246-024-01407-y>. https://doi.org/10.1007/s13246-024-01407-y 10.1007/s13246-024-01407-y
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic R Medicine (General)
spellingShingle R Medicine (General)
Wong, Jeannie Hsiu Ding
Ismail, Wan Hazlinda
Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
description The use of Al2O3:C-based optically stimulated luminescent dosimeters (OSLDs) in diagnostic X-ray is a challenge because of their energy dependence (ED) and variability of element sensitivity factors (ESFs). This study aims to develop a method to determine ED and ESFs of Landauer nanoDot (TM) OSLDs for clinical X-ray and investigate the uncertainties associated with ESF and ED correction factors. An area of 2 x 2 cm(2) at the central axis of the X-ray field was used to establish the ESFs. A total of 80 OSLDs were categorized into ``controlled'' (n = 40) and ``less-controlled'' groups (n = 40). The ESFs of the OSLDs were determined using an 80 kVp X-ray beam quality in free-air geometry. The OSLDs were cross-calibrated with an ion chamber to establish the average calibration coefficient and ESFs. The OSLDs were then irradiated at tube potentials ranging from 50 to 150 kVp to determine their ED. The uniformity of the X-ray field was +/- 1.5% at 100 cm source-to-surface distance. The batch homogeneities of user-defined ESFs were 2.4% and 8.7% for controlled and less-controlled OSLDs, respectively. The ED of OSLDs ranged from 1.125 to 0.812 as tube potential increased from 50 kVp to 150 kVp. The total uncertainty of OSLDs, without ED correction, could be as high as 16%. After applying ESF and ED correction, the total uncertainties were reduced to 6.3% in controlled OLSDs and 11.6% in less-controlled ones. OSLDs corrected with user-defined ESF and ED can reduce the uncertainty of dose measurements in diagnostic X-rays, particularly in managing less-controlled OSLDs.
format Article
author Wong, Jeannie Hsiu Ding
Ismail, Wan Hazlinda
author_facet Wong, Jeannie Hsiu Ding
Ismail, Wan Hazlinda
author_sort Wong, Jeannie Hsiu Ding
title Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
title_short Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
title_full Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
title_fullStr Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
title_full_unstemmed Addressing challenges in diagnostic X-ray dosimetry: uncertainties and corrections for Al2O3:C-based optically stimulated luminescent dosimeters
title_sort addressing challenges in diagnostic x-ray dosimetry: uncertainties and corrections for al2o3:c-based optically stimulated luminescent dosimeters
publisher Springer
publishDate 2024
url http://eprints.um.edu.my/47008/
https://doi.org/10.1007/s13246-024-01407-y
_version_ 1821105753005490176
score 13.244413

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