Modelling of a proton spot scanning system using MCNP6

Ardenfors, Oscar (author): Stockholms universitet,Fysikum,Stockholm University, Stockholm, Sweden

Dasu, Alexandru (author): Linköpings universitet,Avdelningen för radiologiska vetenskaper,Medicinska fakulteten,The Skandion Clinic, Uppsala, Sweden

Kopeć, Mariusz (author): University of Science and Technology, Krakow, Poland

Gudowska, Irena (author): Stockholms universitet,Fysikum,Stockholm University, Stockholm, Sweden

(creator_code:org_t)

2017-06-08
2017
English.
In: International Nuclear Science and Technology Conference. - : Institute of Physics (IOP). ; 860, s. 012025-

Related links:: https://doi.org/10.1...; show more...; https://doi.org/10.1...; https://liu.diva-por... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.1...; https://urn.kb.se/re...; https://urn.kb.se/re...; show less...

Abstract Subject headings

The aim of this work was to model the characteristics of a clinical proton spot scanning beam using Monte Carlo simulations with the code MCNP6. The proton beam was defined using parameters obtained from beam commissioning at the Skandion Clinic, Uppsala, Sweden. Simulations were evaluated against measurements for proton energies between 60 and 226 MeV with regard to range in water, lateral spot sizes in air and absorbed dose depth profiles in water. The model was also used to evaluate the experimental impact of lateral signal losses in an ionization chamber through simulations using different detector radii. Simulated and measured distal ranges agreed within 0.1 mm for R90 and R80 , and within 0.2 mm for R50 . The average absolute difference of all spot sizes was 0.1 mm. The average agreement of absorbed dose integrals and Bragg-peak heights was 0.9%. Lateral signal losses increased with incident proton energy with a maximum signal loss of 7% for 226 MeV protons. The good agreement between simulations and measurements supports the assumptions and parameters employed in the presented Monte Carlo model. The characteristics of the proton spot scanning beam were accurately reproduced and the model will prove useful in future studies on secondary neutrons.

By the author/editor: Ardenfors, Oscar; Dasu, Alexandru; Kopeć, Mariusz; Gudowska, Irena

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cancer and Oncol ...

By the university: Stockholm University; Uppsala University; Linköping University

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.