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- W2515785280 abstract "The Australian Clinical Dosimetry Service (ACDS) has demonstrated the capacity to perform a basic dosimetry audit on all radiotherapy clinics across Australia. During the ACDS's three and a half year trial the majority of the audits were performed using optically stimulated luminescence dosimeters (OSLD) mailed to facilities for exposure to a reference dose, and then returned to the ACDS for analysis. This technical note investigates the stability of the readout process under the large workload of the national dosimetry audit. The OSLD readout uncer- tainty contributes to the uncertainty of several terms of the dose calculation equation and is a major source of uncer- tainty in the audit. The standard deviation of four OSLD readouts was initially established at 0.6 %. Measurements over 13 audit batches—each batch containing 200-400 OSLDs—showed variability (0.5-0.9 %) in the readout standard deviation. These shifts have not yet necessitated a change to the audit scoring levels. However, a standard deviation in OSLD readouts greater than 0.9 % will change the audit scoring levels. We identified mechanical wear on the OSLD readout adapter as a cause of variability in readout uncertainty, however, we cannot rule out other causes. Additionally we observed large fluctuations in the distribution of element correction factors (ECF) for OSLD batches. We conclude that the variability in the width of the ECF distribution from one batch to another is not caused by variability in readout uncertainty, but rather by variations in the OSLD stock." @default.
- W2515785280 created "2016-09-16" @default.
- W2515785280 creator A5044739985 @default.
- W2515785280 date "2015-01-01" @default.
- W2515785280 modified "2023-09-24" @default.
- W2515785280 title "Long term OSLD reader stability in the ACDS level one audit Andrew D. C. AlvesJessica LyeJohn KennyLeon Dunn" @default.
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- W2515785280 hasPublicationYear "2015" @default.
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