Abstract:
:The measurement of absorbed dose to water in a solid-phantom may require a conversion factor because it may not be radiologically equivalent to water. One phantom developed for the use of dosimetry is a solid water, RW3 white-polystyrene material by IBA. This has a lower mass-energy absorption coefficient than water due to high bremsstrahlung yield, which affects the accuracy of absolute dosimetry measurements. In this paper, we demonstrate the calculation of mass-energy absorption coefficient ratios, relative to water, from measurements in plastic water and RW3 with an Elekta Synergy linear accelerator (6 and 10 MV photon beams) as well as Monte Carlo modeling in BEAMnrc and DOSXYZnrc. From this, the solid-phantom-to-water correction factor was determined for plastic water and RW3.
journal_name
Australas Phys Eng Sci Medjournal_title
Australasian physical & engineering sciences in medicineauthors
Seet KY,Hanlon PM,Charles PHdoi
10.1007/s13246-011-0102-4subject
Has Abstractpub_date
2011-12-01 00:00:00pages
553-8issue
4eissn
0158-9938issn
1879-5447journal_volume
34pub_type
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journal_title:Australasian physical & engineering sciences in medicine
pub_type: 临床试验,杂志文章
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