IMPACT OF IRRADIATION SETUP IN PROTON SPOT SCANNING BRAIN THERAPY ON ORGAN DOSES FROM SECONDARY RADIATION

Ardenfors, OscarKarolinska Institutet,Stockholms universitet,Fysikum,Stockholm University, Sweden (author)

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 mu Gy. 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 mu Sv. Gy(-1) for the paediatric patient and between 0.2 and 134 mu Sv. 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.

Gudowska, IrenaStockholms universitet,Fysikum,Stockholm University, Sweden(Swepub:su)igudo (author)
Flejmer, Anna M.Linköpings universitet,Avdelningen för Kirurgi, Ortopedi och Onkologi,Medicinska fakulteten,Region Östergötland, Onkologiska kliniken US(Swepub:liu)annfl57 (author)
Dasu, AlexandruThe Skandion Clinic, Sweden(Swepub:liu)aleda92 (author)
Stockholms universitetFysikum (creator_code:org_t)

In:Radiation Protection Dosimetry: Oxford University Press (OUP)180:1-4, s. 261-2660144-84201742-3406

By the author/editor: Ardenfors, Oscar; Gudowska, Irena; Flejmer, Anna M.; Dasu, Alexandru

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Radiology Nuclea ...

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

By the university: Stockholm University; Uppsala University; Karolinska Institutet; 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.