High spatial resolution microdosimetry with ΔE-E detector on C-12 beam: Monte Carlo simulations

Author

Tran, Linh T. ; Bolst, David ; Guatelli, Susanna ; Prokopovich, Dale A. ; Keat, Ying C. ; Petasecca, Marco ; Lerch, Michael L. F. ; Reinhard, Mark I. ; Fazzi, A. ; Sagia, E. ; Agosteo, S. ; Matsufuji, Naruhiro ; Rosenfeld, Anatoly B.

Author_Institution

Centre for Med. Radiat. Phys., Univ. of Wollongong, Wollongong, NSW, Australia

fYear

2013

fDate

Oct. 27 2013-Nov. 2 2013

Firstpage

1

Lastpage

4

Abstract

The response of ΔE-E telescope in C¹² ion beam at defined positions within the Bragg peak at different depths with 0.5mm step was studied using Geant4 Monte Carlo toolkit. The microdosimetric spectra derived from ΔE stage response using assumption that average chord is 1.8 μm along with simulated scatter plots for the same points. It was demonstrated that microdosimetric spectra is changing dramatically within 0.5 mm depth increments close to and at distal part of the BP that is impossible to observe with TEPC. Fragments (He⁴, He³, Li⁷, Be⁹, B¹¹) and neutrons contributed to microdosimetric spectra and to YD have been analyzed for each position.

Keywords

Monte Carlo methods; beryllium; boron; dosimetry; helium; ion beams; lithium; radiation therapy; telescopes; ΔE stage response; ΔE-E detector; ΔE-E telescope; B¹¹; Be⁹; Bragg peak; C¹² ion beam; Geant4 Monte Carlo toolkit; He³; He⁴; Li⁷; Monte Carlo simulations; high spatial resolution microdosimetry; microdosimetric spectra; size 0.5 mm; size 1.8 mum; Carbon; Detectors; Ion beams; Phantoms; Silicon; Slabs; Telescopes; ΔE-E telescope; C¹² ion therapy; Microdosimetry; Monte Carlo toolkit;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2013 IEEE

Conference_Location

Seoul

Print_ISBN

978-1-4799-0533-1

Type

conf

DOI

10.1109/NSSMIC.2013.6829010

Filename

6829010