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Lithium formate EPR...
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Adolfsson, Emelie,1985-Linköpings universitet,Avdelningen för radiologiska vetenskaper,Hälsouniversitetet
(författare)
Lithium formate EPR dosimetry for accurate measurements of absorbed dose in radiotherapy
Förlag, utgivningsår, omfång ...
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2014-10-07
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Linköping :Linköping University Electronic Press,2014
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51 s.
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electronicrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:liu-111091
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ISBN:9789175192468
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-111091URI
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https://doi.org/10.3384/diss.diva-111091DOI
Kompletterande språkuppgifter
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:dok swepub-publicationtype
Serie
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Linköping University Medical Dissertations,0345-0082 ;1417
Anmärkningar
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Lithium formate has shown to be a material with properties suitable for electron paramagnetic resonance (EPR) dosimetry, among them up to 7 times higher sensitivity compared to alanine, which is a well-established EPR detector material for dose determinations in radiotherapy.The aim of this thesis was to further investigate the properties of lithium formate and develop the dosimetry system towards applications in radiotherapy. The intrinsic efficiency for energies of relevance to brachytherapy and the signal stability were investigated. The dosimetry system was expanded to include a smaller dosimeter model, suitable for measurements in dose gradient regions. An individual sensitivity correction method was applied to the smaller dosimeters to be able to perform dose determinations with the same precision as for the larger ones. EPR dosimetry in general is time consuming and effort was spent to optimize the signal readout procedure regarding measurement time and measurement precision.The system was applied in two clinical applications chosen for their high demands on the dosimetry system: 1) a dosimetry audit for external photon beam therapy and 2) dose verification measurements around a low energy HDR brachytherapy source.The conclusions drawn from this thesis were: dose determinations can be performed with a standard uncertainty of 1.8-2.5% using both the original size dosimeters and the new developed smaller ones. The dosimetry system is robust and useful for applications when high measurement precision and accuracy is prioritized. It is a good candidate for dosimetry audits, both in external beam therapy and brachytherapy.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Carlsson Tedgren, Åsa,Dr.Östergötlands Läns Landsting,Linköpings universitet,Avdelningen för radiologiska vetenskaper,Hälsouniversitetet,Radiofysikavdelningen US(Swepub:liu)asaca90
(preses)
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Lund, Eva,Professor emeritaLinköpings universitet,Avdelningen för radiologiska vetenskaper,Hälsouniversitetet(Swepub:liu)evalu78
(preses)
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Gustafsson, Håkan,Dr.Östergötlands Läns Landsting,Linköpings universitet,Avdelningen för radiologiska vetenskaper,Tekniska högskolan,Medicinsk teknik i Östergötland(Swepub:liu)hakgu16
(preses)
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Olsson, SaraMedical Physics and Technology, Växjö Central Hospital, Växjö, Sweden
(preses)
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Alm Carlsson, Gudrun,Professor emeritasÖstergötlands Läns Landsting,Linköpings universitet,Avdelningen för radiologiska vetenskaper,Centrum för medicinsk bildvetenskap och visualisering, CMIV,Hälsouniversitetet,Radiofysikavdelningen US(Swepub:liu)gudal03
(preses)
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Sharpe, Peter,Dr.National Physical Laboratory, United Kingdom
(opponent)
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Linköpings universitetAvdelningen för radiologiska vetenskaper
(creator_code:org_t)
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