CT dose estimation using Gafchromic XR-CT film: Models comparison

Ying Lan Liao; Hui Chuan Kao; Keh Shih Chuang; Chih Ping Chen; Hui Yu Tsai

doi:10.1016/j.radmeas.2011.08.018

CT dose estimation using Gafchromic XR-CT film: Models comparison

Ying Lan Liao, Hui Chuan Kao, Keh Shih Chuang, Chih Ping Chen, Hui Yu Tsai^*

^*Corresponding author for this work

Department of Medical Imaging and Radiological Sciences

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

6 Scopus citations

Abstract

Previous studies have established four dose response models for Gafchromic films. However, there have been no reports comparing the four dose response models for XR-CT film; and the XR-CT film responses in phantoms at different positions remain unclear. The purpose of this study was to compare the dose response models and to determine the most suitable one for XR-CT film. The correction factors for the energy dependencies of films inside the head and body dosimetry phantoms were assessed. The most appropriate dose response model for Gafchromic XR-CT film was D_film = a (netPV-k)² + b (netPV-k). The XR-CT films could be used to measure CTDI values in phantoms with appropriate correction factors. Moreover, the doses estimated from XR-CT films used in the Taiwan CT survey agreed with the data measured using the ionization chamber. The Gafchromic XR-CT film could be used to measure CTDI values with the appropriate dose response model and correction factors.

Original language	English
Pages (from-to)	2052-2055
Number of pages	4
Journal	Radiation Measurements
Volume	46
Issue number	12
DOIs	https://doi.org/10.1016/j.radmeas.2011.08.018
State	Published - 12 2011

Keywords

Dose response
Energy dependence
Gafchromic XR-CT
Radiation dosimetry
Radiochromic film

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title = "CT dose estimation using Gafchromic XR-CT film: Models comparison",

abstract = "Previous studies have established four dose response models for Gafchromic films. However, there have been no reports comparing the four dose response models for XR-CT film; and the XR-CT film responses in phantoms at different positions remain unclear. The purpose of this study was to compare the dose response models and to determine the most suitable one for XR-CT film. The correction factors for the energy dependencies of films inside the head and body dosimetry phantoms were assessed. The most appropriate dose response model for Gafchromic XR-CT film was Dfilm = a (netPV-k)2 + b (netPV-k). The XR-CT films could be used to measure CTDI values in phantoms with appropriate correction factors. Moreover, the doses estimated from XR-CT films used in the Taiwan CT survey agreed with the data measured using the ionization chamber. The Gafchromic XR-CT film could be used to measure CTDI values with the appropriate dose response model and correction factors.",

keywords = "Dose response, Energy dependence, Gafchromic XR-CT, Radiation dosimetry, Radiochromic film",

author = "Liao, {Ying Lan} and Kao, {Hui Chuan} and Chuang, {Keh Shih} and Chen, {Chih Ping} and Tsai, {Hui Yu}",

year = "2011",

month = dec,

doi = "10.1016/j.radmeas.2011.08.018",

language = "英语",

volume = "46",

pages = "2052--2055",

journal = "Radiation Measurements",

issn = "1350-4487",

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T1 - CT dose estimation using Gafchromic XR-CT film

T2 - Models comparison

AU - Liao, Ying Lan

AU - Kao, Hui Chuan

AU - Chuang, Keh Shih

AU - Chen, Chih Ping

AU - Tsai, Hui Yu

PY - 2011/12

Y1 - 2011/12

N2 - Previous studies have established four dose response models for Gafchromic films. However, there have been no reports comparing the four dose response models for XR-CT film; and the XR-CT film responses in phantoms at different positions remain unclear. The purpose of this study was to compare the dose response models and to determine the most suitable one for XR-CT film. The correction factors for the energy dependencies of films inside the head and body dosimetry phantoms were assessed. The most appropriate dose response model for Gafchromic XR-CT film was Dfilm = a (netPV-k)2 + b (netPV-k). The XR-CT films could be used to measure CTDI values in phantoms with appropriate correction factors. Moreover, the doses estimated from XR-CT films used in the Taiwan CT survey agreed with the data measured using the ionization chamber. The Gafchromic XR-CT film could be used to measure CTDI values with the appropriate dose response model and correction factors.

AB - Previous studies have established four dose response models for Gafchromic films. However, there have been no reports comparing the four dose response models for XR-CT film; and the XR-CT film responses in phantoms at different positions remain unclear. The purpose of this study was to compare the dose response models and to determine the most suitable one for XR-CT film. The correction factors for the energy dependencies of films inside the head and body dosimetry phantoms were assessed. The most appropriate dose response model for Gafchromic XR-CT film was Dfilm = a (netPV-k)2 + b (netPV-k). The XR-CT films could be used to measure CTDI values in phantoms with appropriate correction factors. Moreover, the doses estimated from XR-CT films used in the Taiwan CT survey agreed with the data measured using the ionization chamber. The Gafchromic XR-CT film could be used to measure CTDI values with the appropriate dose response model and correction factors.

KW - Dose response

KW - Energy dependence

KW - Gafchromic XR-CT

KW - Radiation dosimetry

KW - Radiochromic film

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M3 - 文章

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SN - 1350-4487

VL - 46

SP - 2052

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JO - Radiation Measurements

JF - Radiation Measurements

IS - 12

ER -

CT dose estimation using Gafchromic XR-CT film: Models comparison

Abstract

Keywords

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