Intra-irradiation changes in the signal of polymer-based dosimeter (GAFCHROMIC EBT) due to dose rate variations

Alexandra Rink; I. Alex Vitkin; David A. Jaffray

doi:10.1088/0031-9155/52/22/N03

Intra-irradiation changes in the signal of polymer-based dosimeter (GAFCHROMIC EBT) due to dose rate variations

Alexandra Rink, I. Alex Vitkin, David A. Jaffray

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The effect of dose rate on the real-time change in optical density (ΔOD) of a GAFCHROMIC® EBT film is quantified using a previously reported optical readout approach. A range of doses (5-1000 cGy) and dose rates (16-520 cGy min^-1) are used, and a statistically significant difference between ΔOD of films exposed at different dose rates occurs within approximately one order of magnitude change in the dose rate. A small increase in per cent standard deviation of measured ΔOD values is also observed when the entire dose rate range was used, but in all cases combining all ΔOD values produces per cent standard deviation of <4.5%. Thus, whether the dose rate effect is clinically significant depends on the specific application of EBT and the desired accuracy.

Original language	English (US)
Pages (from-to)	N523-N529
Journal	Physics in medicine and biology
Volume	52
Issue number	22
DOIs	https://doi.org/10.1088/0031-9155/52/22/N03
State	Published - Nov 21 2007
Externally published	Yes

ASJC Scopus subject areas

Radiological and Ultrasound Technology
Radiology Nuclear Medicine and imaging

Access to Document

10.1088/0031-9155/52/22/N03

Cite this

@article{fa666157d3694a0d915f6a215fc2c27b,

title = "Intra-irradiation changes in the signal of polymer-based dosimeter (GAFCHROMIC EBT) due to dose rate variations",

abstract = "The effect of dose rate on the real-time change in optical density (ΔOD) of a GAFCHROMIC{\textregistered} EBT film is quantified using a previously reported optical readout approach. A range of doses (5-1000 cGy) and dose rates (16-520 cGy min-1) are used, and a statistically significant difference between ΔOD of films exposed at different dose rates occurs within approximately one order of magnitude change in the dose rate. A small increase in per cent standard deviation of measured ΔOD values is also observed when the entire dose rate range was used, but in all cases combining all ΔOD values produces per cent standard deviation of <4.5%. Thus, whether the dose rate effect is clinically significant depends on the specific application of EBT and the desired accuracy.",

author = "Alexandra Rink and Vitkin, {I. Alex} and Jaffray, {David A.}",

year = "2007",

month = nov,

day = "21",

doi = "10.1088/0031-9155/52/22/N03",

language = "English (US)",

volume = "52",

pages = "N523--N529",

journal = "Physics in medicine and biology",

issn = "0031-9155",

publisher = "IOP Publishing Ltd.",

number = "22",

}

TY - JOUR

T1 - Intra-irradiation changes in the signal of polymer-based dosimeter (GAFCHROMIC EBT) due to dose rate variations

AU - Rink, Alexandra

AU - Vitkin, I. Alex

AU - Jaffray, David A.

PY - 2007/11/21

Y1 - 2007/11/21

N2 - The effect of dose rate on the real-time change in optical density (ΔOD) of a GAFCHROMIC® EBT film is quantified using a previously reported optical readout approach. A range of doses (5-1000 cGy) and dose rates (16-520 cGy min-1) are used, and a statistically significant difference between ΔOD of films exposed at different dose rates occurs within approximately one order of magnitude change in the dose rate. A small increase in per cent standard deviation of measured ΔOD values is also observed when the entire dose rate range was used, but in all cases combining all ΔOD values produces per cent standard deviation of <4.5%. Thus, whether the dose rate effect is clinically significant depends on the specific application of EBT and the desired accuracy.

AB - The effect of dose rate on the real-time change in optical density (ΔOD) of a GAFCHROMIC® EBT film is quantified using a previously reported optical readout approach. A range of doses (5-1000 cGy) and dose rates (16-520 cGy min-1) are used, and a statistically significant difference between ΔOD of films exposed at different dose rates occurs within approximately one order of magnitude change in the dose rate. A small increase in per cent standard deviation of measured ΔOD values is also observed when the entire dose rate range was used, but in all cases combining all ΔOD values produces per cent standard deviation of <4.5%. Thus, whether the dose rate effect is clinically significant depends on the specific application of EBT and the desired accuracy.

UR - http://www.scopus.com/inward/record.url?scp=35848945089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35848945089&partnerID=8YFLogxK

U2 - 10.1088/0031-9155/52/22/N03

DO - 10.1088/0031-9155/52/22/N03

M3 - Article

C2 - 17975282

AN - SCOPUS:35848945089

SN - 0031-9155

VL - 52

SP - N523-N529

JO - Physics in medicine and biology

JF - Physics in medicine and biology

IS - 22

ER -

Intra-irradiation changes in the signal of polymer-based dosimeter (GAFCHROMIC EBT) due to dose rate variations

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this