Evaluation of aluminum oxide fluorescent and OSL detectors in proton radiotherapy beams

J. A. Bartz; G. J. Sykora; T. H. Underwood; D. N. Nichiporov; G. O. Sawakuchi; M. S. Akselrod

doi:10.1016/j.radmeas.2011.05.047

Evaluation of aluminum oxide fluorescent and OSL detectors in proton radiotherapy beams

J. A. Bartz, G. J. Sykora, T. H. Underwood, D. N. Nichiporov, G. O. Sawakuchi, M. S. Akselrod

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

8 Scopus citations

Abstract

Fluorescent Nuclear Track Detectors (FNTD) and Optically Stimulated Luminescence Detectors (OSLD) were investigated for application in proton therapy dosimetry. FNTDs and OSLDs are made of Al₂O₃:C,Mg single crystals and Al₂O₃:C powder, respectively. The detectors were irradiated in water, behind different thicknesses of plastic slabs and behind wedge shaped plastic absorbers. FNTDs positioned behind different thicknesses of plastic slabs and in water phantom show Bragg curves with a peak to entrance ratio of eight compared to about three from ionization chamber measurements. The over-response of FNTDs is attributed to the non-linear response of the power spectrum integral (PSI) parameter as a function of proton linear energy transfer (LET). The limitations of the wedge absorber experiment due to lateral proton straggling are discussed. Experimental data and image simulations were utilized to obtain LET dependencies for the FNTD power spectrum integral and fluorescence amplitude.

Original language	English (US)
Pages (from-to)	1974-1978
Number of pages	5
Journal	Radiation Measurements
Volume	46
Issue number	12
DOIs	https://doi.org/10.1016/j.radmeas.2011.05.047
State	Published - Dec 2011
Externally published	Yes

Keywords

Aluminum oxide crystals
Bragg peak
Fluorescence
Luminescent detectors
Optically stimulated luminescence
Proton therapy
Radiation dosimetry
Radiation imaging

ASJC Scopus subject areas

Radiation
Instrumentation

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10.1016/j.radmeas.2011.05.047

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title = "Evaluation of aluminum oxide fluorescent and OSL detectors in proton radiotherapy beams",

abstract = "Fluorescent Nuclear Track Detectors (FNTD) and Optically Stimulated Luminescence Detectors (OSLD) were investigated for application in proton therapy dosimetry. FNTDs and OSLDs are made of Al2O3:C,Mg single crystals and Al2O3:C powder, respectively. The detectors were irradiated in water, behind different thicknesses of plastic slabs and behind wedge shaped plastic absorbers. FNTDs positioned behind different thicknesses of plastic slabs and in water phantom show Bragg curves with a peak to entrance ratio of eight compared to about three from ionization chamber measurements. The over-response of FNTDs is attributed to the non-linear response of the power spectrum integral (PSI) parameter as a function of proton linear energy transfer (LET). The limitations of the wedge absorber experiment due to lateral proton straggling are discussed. Experimental data and image simulations were utilized to obtain LET dependencies for the FNTD power spectrum integral and fluorescence amplitude.",

keywords = "Aluminum oxide crystals, Bragg peak, Fluorescence, Luminescent detectors, Optically stimulated luminescence, Proton therapy, Radiation dosimetry, Radiation imaging",

author = "Bartz, {J. A.} and Sykora, {G. J.} and Underwood, {T. H.} and Nichiporov, {D. N.} and Sawakuchi, {G. O.} and Akselrod, {M. S.}",

year = "2011",

month = dec,

doi = "10.1016/j.radmeas.2011.05.047",

language = "English (US)",

volume = "46",

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journal = "Radiation Measurements",

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AU - Bartz, J. A.

AU - Sykora, G. J.

AU - Underwood, T. H.

AU - Nichiporov, D. N.

AU - Sawakuchi, G. O.

AU - Akselrod, M. S.

PY - 2011/12

Y1 - 2011/12

N2 - Fluorescent Nuclear Track Detectors (FNTD) and Optically Stimulated Luminescence Detectors (OSLD) were investigated for application in proton therapy dosimetry. FNTDs and OSLDs are made of Al2O3:C,Mg single crystals and Al2O3:C powder, respectively. The detectors were irradiated in water, behind different thicknesses of plastic slabs and behind wedge shaped plastic absorbers. FNTDs positioned behind different thicknesses of plastic slabs and in water phantom show Bragg curves with a peak to entrance ratio of eight compared to about three from ionization chamber measurements. The over-response of FNTDs is attributed to the non-linear response of the power spectrum integral (PSI) parameter as a function of proton linear energy transfer (LET). The limitations of the wedge absorber experiment due to lateral proton straggling are discussed. Experimental data and image simulations were utilized to obtain LET dependencies for the FNTD power spectrum integral and fluorescence amplitude.

AB - Fluorescent Nuclear Track Detectors (FNTD) and Optically Stimulated Luminescence Detectors (OSLD) were investigated for application in proton therapy dosimetry. FNTDs and OSLDs are made of Al2O3:C,Mg single crystals and Al2O3:C powder, respectively. The detectors were irradiated in water, behind different thicknesses of plastic slabs and behind wedge shaped plastic absorbers. FNTDs positioned behind different thicknesses of plastic slabs and in water phantom show Bragg curves with a peak to entrance ratio of eight compared to about three from ionization chamber measurements. The over-response of FNTDs is attributed to the non-linear response of the power spectrum integral (PSI) parameter as a function of proton linear energy transfer (LET). The limitations of the wedge absorber experiment due to lateral proton straggling are discussed. Experimental data and image simulations were utilized to obtain LET dependencies for the FNTD power spectrum integral and fluorescence amplitude.

KW - Aluminum oxide crystals

KW - Bragg peak

KW - Fluorescence

KW - Luminescent detectors

KW - Optically stimulated luminescence

KW - Proton therapy

KW - Radiation dosimetry

KW - Radiation imaging

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ER -

Evaluation of aluminum oxide fluorescent and OSL detectors in proton radiotherapy beams

Abstract

Keywords

ASJC Scopus subject areas

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