Suitability of radiochromic films for dosimetry of low energy X-rays

Martin Ebert; A.H. Asad; S.A. Siddiqui

doi:10.1120/jacmp.v10i4.2957

Suitability of radiochromic films for dosimetry of low energy X-rays

Martin Ebert, A.H. Asad, S.A. Siddiqui

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31 Citations (Scopus)

Abstract

This study examined the response characteristics of three commercially available radiochromic films when exposed to very low energy (50 kVp) X-rays. The aim was to evaluate the films for potential use in 2D dosimetry for a low-kV intraoperative radiotherapy (IORT) device. Dose-response relationships were obtained for Gafchromic® EBT, XR-RV2 and XR-QA film in water at several distances from the IORT source in order to evaluate the effect of changes in X-ray spectrum on response. It was found that the dose-rates from the source were excessive for use of the XR-QA film, and that all three film types films showed significant energy dependence within the limits of measurement uncertainty. This is in contrast to previous studies indicating less or negligible energy response. All films showed non-linearity in response over the ranges examined. These results imply significant limitations for the use of these films for low-kV dosimetry.

Original language	English
Pages (from-to)	N/A
Journal	Journal of Applied Clinical Medical Physics
Volume	10
Issue number	4
DOIs	https://doi.org/10.1120/jacmp.v10i4.2957
Publication status	Published - 2009

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title = "Suitability of radiochromic films for dosimetry of low energy X-rays",

abstract = "This study examined the response characteristics of three commercially available radiochromic films when exposed to very low energy (50 kVp) X-rays. The aim was to evaluate the films for potential use in 2D dosimetry for a low-kV intraoperative radiotherapy (IORT) device. Dose-response relationships were obtained for Gafchromic{\textregistered} EBT, XR-RV2 and XR-QA film in water at several distances from the IORT source in order to evaluate the effect of changes in X-ray spectrum on response. It was found that the dose-rates from the source were excessive for use of the XR-QA film, and that all three film types films showed significant energy dependence within the limits of measurement uncertainty. This is in contrast to previous studies indicating less or negligible energy response. All films showed non-linearity in response over the ranges examined. These results imply significant limitations for the use of these films for low-kV dosimetry.",

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T1 - Suitability of radiochromic films for dosimetry of low energy X-rays

AU - Ebert, Martin

AU - Asad, A.H.

AU - Siddiqui, S.A.

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N2 - This study examined the response characteristics of three commercially available radiochromic films when exposed to very low energy (50 kVp) X-rays. The aim was to evaluate the films for potential use in 2D dosimetry for a low-kV intraoperative radiotherapy (IORT) device. Dose-response relationships were obtained for Gafchromic® EBT, XR-RV2 and XR-QA film in water at several distances from the IORT source in order to evaluate the effect of changes in X-ray spectrum on response. It was found that the dose-rates from the source were excessive for use of the XR-QA film, and that all three film types films showed significant energy dependence within the limits of measurement uncertainty. This is in contrast to previous studies indicating less or negligible energy response. All films showed non-linearity in response over the ranges examined. These results imply significant limitations for the use of these films for low-kV dosimetry.

AB - This study examined the response characteristics of three commercially available radiochromic films when exposed to very low energy (50 kVp) X-rays. The aim was to evaluate the films for potential use in 2D dosimetry for a low-kV intraoperative radiotherapy (IORT) device. Dose-response relationships were obtained for Gafchromic® EBT, XR-RV2 and XR-QA film in water at several distances from the IORT source in order to evaluate the effect of changes in X-ray spectrum on response. It was found that the dose-rates from the source were excessive for use of the XR-QA film, and that all three film types films showed significant energy dependence within the limits of measurement uncertainty. This is in contrast to previous studies indicating less or negligible energy response. All films showed non-linearity in response over the ranges examined. These results imply significant limitations for the use of these films for low-kV dosimetry.

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DO - 10.1120/jacmp.v10i4.2957

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SP - N/A

JO - Journal of Applied Clinical Medical Physics

JF - Journal of Applied Clinical Medical Physics

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ER -

Suitability of radiochromic films for dosimetry of low energy X-rays

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