Browsing NTNU Open by Author "Engelsen, Ola"
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Dosimetric impact of geometric distortions in radiotherapeutic dose planning
Fikstvedt, Lene (Master thesis, 2022)Bakgrunn: Magnetisk resonanstomografi (MR) har potensial til å forbedre strålebehandling ved å forbedre volum inntegning, fjerne usikkerhet knyttet til bildesamregistrering og tilføye funksjonell vevs-informasjon. I klinisk ... -
Natural and anthropogenic atmospheric mercury in the European Arctic: a fractionation study
Steen, Anne Orderdalen; Berg, Torunn; Dastoor, Ashu P.; Durnford, Dorothy, A.; Engelsen, Ola; Hole, Lars Robert; Aspmo, Katrine (Journal article; Peer reviewed, 2011)This study reports the longest time series of GEM, RGM and particle-bound mercury (PHg) concentrations from a European Arctic site. From 27 April 2007 until 31 December 2008 composite GEM, RGM and PHg measurements were ... -
Radiotherapeutic Limits of Acceptance for Errors in Synthetic CT Synthesised from MRI
Jensen, Leif-André Bjerkeli (Master thesis, 2020)CT-skanninger, som resulterer i elektrontetthetskart eller massetetthetskart, er standard inndata for strålebehandlingplanleggingssystemer. Imidlertid gir MR overlegen bløtvevskontrast. I tilfeller der MR er nødvendig for ... -
Ten-year trends in atmospheric mercury concentrations, meteorological effects and climate variables at Zeppelin, Ny-Ålesund
Berg, Torunn; Cole, AS; Engelsen, Ola; Steffen, A; Pfaffhuber, Katrine Aspmo (Journal article; Peer reviewed, 2013)Results from ten years of gaseous elemental mercury (GEM) measurements at Zeppelin station, Ny-A° lesund, Svalbard, show no overall annual trend between 2000 and 2009. Seasonal trend analysis showed significantly ...