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Impact of irradiation setup in proton spot scanning brain therapy on organ doses from secondary radiation
Stockholm University, Sweden.
Stockholm University, Sweden.
Linköping University, Department of Clinical and Experimental Medicine, Division of Surgery, Orthopedics and Oncology. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Oncology.ORCID iD: 0000-0001-8425-8110
The Skandion Clinic, Sweden.ORCID iD: 0000-0001-8171-2541
2018 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 180, no 1-4, p. 261-266Article in journal (Refereed) Published
Abstract [en]

A Monte Carlo model of a proton spot scanning pencil beam was used to simulate organ doses from secondary radiation produced from brain tumour treatments delivered with either a lateral field or a vertex field to one adult and one paediatric patient. Absorbed doses from secondary neutrons, photons and protons and neutron equivalent doses were higher for the vertex field in both patients, but the differences were low in absolute terms. Absorbed doses ranged between 0.1 and 43 μGy.Gy−1 in both patients with the paediatric patient receiving higher doses. The neutron equivalent doses to the organs ranged between 0.5 and 141 μSv.Gy−1 for the paediatric patient and between 0.2 and 134 μSv.Gy−1 for the adult. The highest neutron equivalent dose from the entire treatment was 7 mSv regardless of field setup and patient size. The results indicate that different field setups do not introduce large absolute variations in out-of-field doses produced in patients undergoing proton pencil beam scanning of centrally located brain tumours.

Place, publisher, year, edition, pages
Oxford University Press, 2018. Vol. 180, no 1-4, p. 261-266
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:liu:diva-145634DOI: 10.1093/rpd/ncy013ISI: 000440983000055PubMedID: 30085315OAI: oai:DiVA.org:liu-145634DiVA, id: diva2:1189440
Conference
13th Symposium on Neutron and Ion Dosimetry (NEUDOS), Polish Acad Sci, Inst Nucl Phys, Krakow, POLAND, MAY 13-19, 2017
Available from: 2018-03-10 Created: 2018-03-10 Last updated: 2018-08-24

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Ardenfors, OscarFlejmer, Anna M.Dasu, Alexandru
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