Design and fabrication of a Nano-based neutron shield for fast neutrons from medical linear accelerators in radiation therapy.
B4c
Fe3o4
Nanoparticle
Nanoshield
Neutron
Photo-neutron
Shielding
Silicone resin
Journal
Radiation oncology (London, England)
ISSN: 1748-717X
Titre abrégé: Radiat Oncol
Pays: England
ID NLM: 101265111
Informations de publication
Date de publication:
11 May 2020
11 May 2020
Historique:
received:
31
10
2019
accepted:
27
04
2020
entrez:
13
5
2020
pubmed:
13
5
2020
medline:
23
3
2021
Statut:
epublish
Résumé
Photo-neutrons are produced at the head of the medical linear accelerators (linac) by the interaction of high-energy photons, and patients receive a whole-body-absorbed dose from these neutrons. The current study aimed to find an efficient shielding material for fast neutrons. Nanoparticles (NPs) of Fe MC simulation results with uncertainty less than 1% showed that for discrete energies and 50% nanomaterial concentration, the macroscopic cross-sections for iron oxide and boron carbide at the energy of 1 MeV were 0.36 cm Results achieved from MC simulation and experimental tests were in a satisfactory agreement. The difference between MC and measurements was in the range of 10%. Our results demonstrated that the designed double-layer shield has a superior macroscopic cross-section compared with two single-layer nanoshields and more efficiently eliminates fast photo-neutrons.
Sections du résumé
BACKGROUND
BACKGROUND
Photo-neutrons are produced at the head of the medical linear accelerators (linac) by the interaction of high-energy photons, and patients receive a whole-body-absorbed dose from these neutrons. The current study aimed to find an efficient shielding material for fast neutrons.
METHODS
METHODS
Nanoparticles (NPs) of Fe
RESULTS
RESULTS
MC simulation results with uncertainty less than 1% showed that for discrete energies and 50% nanomaterial concentration, the macroscopic cross-sections for iron oxide and boron carbide at the energy of 1 MeV were 0.36 cm
CONCLUSION
CONCLUSIONS
Results achieved from MC simulation and experimental tests were in a satisfactory agreement. The difference between MC and measurements was in the range of 10%. Our results demonstrated that the designed double-layer shield has a superior macroscopic cross-section compared with two single-layer nanoshields and more efficiently eliminates fast photo-neutrons.
Identifiants
pubmed: 32393290
doi: 10.1186/s13014-020-01551-1
pii: 10.1186/s13014-020-01551-1
pmc: PMC7216519
doi:
Substances chimiques
Boron Compounds
0
Ferric Compounds
0
ferric oxide
1K09F3G675
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
105Références
Appl Radiat Isot. 2017 Mar;121:122-125
pubmed: 28056408
Health Phys. 2004 May;86 Suppl 2:S94-S102
pubmed: 28121699
Rep Pract Oncol Radiother. 2010 Sep 22;15(5):138-44
pubmed: 24376940
Appl Radiat Isot. 2012 Jan;70(1):233-40
pubmed: 21820906
Appl Radiat Isot. 2005 Jan;62(1):69-72
pubmed: 15498687
Int J Radiat Oncol Biol Phys. 1995 Feb 1;31(3):629-33
pubmed: 7852129
Phys Med Biol. 2014 May 21;59(10):2457-68
pubmed: 24778349
Jpn J Radiol. 2010 Jun;28(5):398-403
pubmed: 20585932
Med Phys. 2009 Sep;36(9):4027-38
pubmed: 19810475
Radiat Prot Dosimetry. 2008;132(1):13-7
pubmed: 18940821
Appl Radiat Isot. 2012 Apr;70(4):781-4
pubmed: 22261089
Phys Med Biol. 1988 Sep;33(9):1017-36
pubmed: 3143129
Med Phys. 2005 Dec;32(12):3579-88
pubmed: 16475756
Br J Radiol. 2007 Jun;80(954):469-75
pubmed: 17360932
Med Phys. 2017 Oct;44(10):e391-e429
pubmed: 28688159
Phys Med Biol. 2000 Dec;45(12):L55-61
pubmed: 11131205
Health Phys. 1998 Jan;74(1):38-47
pubmed: 9415580