Investigation of signal fading in lithium formate EPR dosimeters using a new sensitive method.
Phys Med Biol
; 57(8): 2209-17, 2012 Apr 21.
Article
en En
| MEDLINE
| ID: mdl-22456424
The aim of this study was to investigate signal fading in lithium formate electron paramagnetic resonance (EPR) dosimeters used for clinical applications in radiotherapy. A new experimental method for determination of signal fading, designed to resolve small changes in signal from slowly decaying unstable radicals, was used. Possible signal fading in lithium formate due to different storage temperatures was also tested. Air humidity was kept at a constant level of 33% throughout the experiments. The conclusion drawn from the investigations was that the EPR signal from lithium formate is stable during at least 1 month after irradiation and is not sensitive to variations in storage temperature <40 °C when kept at a relative air humidity of 33%. This makes lithium formate a suitable dosimeter for transfer dosimetry in clinical audits.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Radiometría
/
Artefactos
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Espectroscopía de Resonancia por Spin del Electrón
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Formiatos
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Phys Med Biol
Año:
2012
Tipo del documento:
Article
País de afiliación:
Suecia
Pais de publicación:
Reino Unido