Investigation of secondary mixed radiation field around a medical linear accelerator

Piotr Tulik , Monika Tulik , Maciej Grzegorz Maciak , Natalia Golnik , Damian Kabat , Tomasz Byrski , Jan Lesiak

Abstract

The aim of this study is to investigate secondary mixed radiation field around linac, as the first part of an overall assessment of out-of-field contribution of neutron dose for new advanced radiation dose delivery techniques. All measurements were performed around Varian Clinic 2300 C/D accelerator at Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow Branch. Recombination chambers REM-2 and GW2 were used for recombination index of radiation quality Q4 determination (as an estimate of quality factor Q), measurement of total tissue dose Dt and calculation of gamma and neutron components to Dt. Estimation of Dt and Q4 allowed for the ambient dose equivalent H*(10) per monitor unit (MU) calculations. Measurements around linac were performed on the height of the middle of the linac’s head (three positions) and on the height of the linac’s isocentre (five positions). Estimation of secondary radiation level was carried out for seven different configurations of upper and lower jaws position and multileaf collimator set open or closed in each position. Study includes the use of two photon beam modes: 6 and 18 MV. Spatial distribution of ambient dose equivalent H*(10) per MU on the height of the linac’s head and on the standard couch height for patients during the routine treatment, as well as relative contribution of gamma and neutron secondary radiation inside treatment room were evaluated.
Author Piotr Tulik (FM / IMBE)
Piotr Tulik,,
- The Institute of Metrology and Biomedical Engineering
, Monika Tulik - Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow
Monika Tulik,,
-
, Maciej Grzegorz Maciak (FM / IMBE)
Maciej Grzegorz Maciak,,
- The Institute of Metrology and Biomedical Engineering
, Natalia Golnik (FM / IMBE)
Natalia Golnik,,
- The Institute of Metrology and Biomedical Engineering
, Damian Kabat - Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow
Damian Kabat,,
-
, Tomasz Byrski - [Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow]
Tomasz Byrski,,
-
- Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow
, Jan Lesiak - [Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow]
Jan Lesiak ,,
-
- Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow
Corporate authorIMiIB MCHTR PW, Maria Sklodowska-Curie Memorial, Cancer Center and Institute of Oncology, Krakow
Journal seriesRadiation Protection Dosimetry, ISSN 0144-8420, (A 15 pkt)
Issue year2018
Vol180
No1-4
Pages252-255
Publication size in sheets0.5
Keywords in Polishmedyczny akcelerator liniowy, ochrona radiologiczna, promieniowanie wtórne, rekombinacyjne komory jonizacyjne
Keywords in Englishmedical linear accelerator, radiation protection, secondary mixed radiation field, recombination chambers
DOIDOI:10.1093/rpd/ncx199
URL https://doi.org/10.1093/rpd/ncx199
Languageen angielski
Score (nominal)20
ScoreMinisterial score = 15.0, 09-10-2017, ArticleFromJournal
Ministerial score (2013-2016) = 20.0, 09-10-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 0.917 (2) - 2016=0.936 (5)
Citation count*
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back