The purpose of this work is to study the dependence of the dosimetric properties of poly(vinyl-alcohol)-glutaraldehyde Fricke gel dosimeters (PVA-GTA-FG) both on the irradiation temperature and on temperature changes possibly occurring between the irradiation and readout phases. Such effects were investigated by means of MRI and optical absorbance measurements. The results did not reveal any significant dependence of the sensitivity of the dosimeters on the irradiation temperature in the investigated interval (20◦C-35◦C). In contrast, the effect of the holding temperature may be not negligible. Additionally, PVA-GTA-FG proved to be nearly tissue-equivalent and characterized by a response independent on the energies and dose-rates in the investigated intervals (0-15 Gy). These findings suggested that PVA-GTA-FG are promising tools for clinical dosimetry.

Characterization of PVA-GTA Fricke gels dosimeters using MRI and optical techniques in X-rays external radiation therapy / S. Gallo, P. Arosio, S. Locarno, M.G. Brambilla, D. Lizio, A.F. Monti, F. Orsini, A. Torresin, C. Lenardi, I. Veronese - In: 106° Congresso Nazionale / [a cura di] B. Alzani, M. Bellacosa e G. Bianchi Bazzi. - [s.l] : SIF, 2020. - ISBN 9788874381234. - pp. 224-224 (( Intervento presentato al 106. convegno Congresso Nazionale SIF nel 2020.

Characterization of PVA-GTA Fricke gels dosimeters using MRI and optical techniques in X-rays external radiation therapy

S. Gallo
Investigation
;
P. Arosio
Membro del Collaboration Group
;
S. Locarno
Membro del Collaboration Group
;
A.F. Monti
Membro del Collaboration Group
;
F. Orsini
Membro del Collaboration Group
;
A. Torresin
Membro del Collaboration Group
;
C. Lenardi
Membro del Collaboration Group
;
I. Veronese
Supervision
2020

Abstract

The purpose of this work is to study the dependence of the dosimetric properties of poly(vinyl-alcohol)-glutaraldehyde Fricke gel dosimeters (PVA-GTA-FG) both on the irradiation temperature and on temperature changes possibly occurring between the irradiation and readout phases. Such effects were investigated by means of MRI and optical absorbance measurements. The results did not reveal any significant dependence of the sensitivity of the dosimeters on the irradiation temperature in the investigated interval (20◦C-35◦C). In contrast, the effect of the holding temperature may be not negligible. Additionally, PVA-GTA-FG proved to be nearly tissue-equivalent and characterized by a response independent on the energies and dose-rates in the investigated intervals (0-15 Gy). These findings suggested that PVA-GTA-FG are promising tools for clinical dosimetry.
Fricke gel; MRI; PVA; GTA; Dosimetry
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/03 - Fisica della Materia
Settore FIS/01 - Fisica Sperimentale
Settore CHIM/02 - Chimica Fisica
Settore MED/36 - Diagnostica per Immagini e Radioterapia
https://www.sif.it/attivita/congresso/106
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/759706
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