Polymer gel dosimetry on a multislice computed tomography scanner : effect of changing parameters on CTDI | Macquarie University ResearchOnline

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Polymer gel dosimetry on a multislice computed tomography scanner : effect of changing parameters on CTDI

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/192785

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Title: Polymer gel dosimetry on a multislice computed tomography scanner : effect of changing parameters on CTDI
Related: Physica medica, Vol. 24, No. 3, (2008), p.149-158
DOI: 10.1016/j.ejmp.2007.11.005
Publisher: Elsevier
Date: 2008
Author/Creator: Hill, B
Author/Creator: Venning, A. J
Author/Creator: Baldock, C
Description: Polymer gel dosimetry undertaken on a multislice CT scanner provides an alternative method to conventional dosimetry measurements. Polymer gel dosimeters were used to measure CT radiation doses and compared to TLD and ionization chamber measurements in different diameter phantoms. CTDI was investigated for each of these phantoms for a range of mAs (100-400 mAs), tube voltage (100-135 kV) and nominal slice width (2-32 mm). Linear fits of the CTDI values for mAs show for the smallest phantom diameter an increase in CTDI of 60% for both TLD and polymer gel dosimeters. A similar increase in CTDI of 50% at 100 kVp and 100% for 135 kVp was also noted. It was also shown that slice width variation measured with either polymer gel or TLD was greatest with the smallest slice widths. In summary, it was found that polymer gels can be used as an alternative dosimeter to TLD for the determination of SWDP and subsequent CTDI calculations.
Description: 10 page(s)
Subject Keyword: Computed tomography
Subject Keyword: CT
Subject Keyword: Dose profile
Subject Keyword: Dosimeter
Subject Keyword: MRI
Subject Keyword: Normoxic polymer gel dosimetry
Subject Keyword: Radiation
Resource Type: journal article
Organisation: Macquarie University. Faculty of Science

Identifier: http://hdl.handle.net/1959.14/192785
Identifier: ISSN:1120-1797
Identifier: mq_res-ext-2-s2.0-50249095596
Language: eng
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