Investigation of signal fading in lithium formate EPR dosimeters using a new sensitive method
2012 (English)In: Physics in Medicine and Biology, ISSN 0031-9155, E-ISSN 1361-6560, Vol. 57, no 8, 2209-2217 p.Article in journal (Refereed) Published
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 andlt;40 degrees C when kept at a relative air humidity of 33%. This makes lithium formate a suitable dosimeter for transfer dosimetry in clinical audits.
Place, publisher, year, edition, pages
Institute of Physics (IOP), 2012. Vol. 57, no 8, 2209-2217 p.
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-77095DOI: 10.1088/0031-9155/57/8/2209ISI: 000302567100008PubMedID: 22456424OAI: oai:DiVA.org:liu-77095DiVA: diva2:524959
Funding Agencies|Swedish Cancer foundation (CF)|100443|FORSS|86231|2012-05-042012-05-042015-03-20Bibliographically approved