The design and dosimetric evaluation of tannin-based Rhizophora spp. particleboards as phantoms for high energy photons and electrons

International Nuclear Science, Technology and Engineering Conference 2017

原子能学

Mohd Yusof, M.F.^1,3 ; Abdullah, R.^3 ; Tajuddin, A.A.^1 ; Hashim, R.^2 ; Bauk, S.^1 ; Abd Hamid, P.N.K.^1

School of Physics, Universiti Sains Malaysia, Penang

11800, Malaysia^1

School of Industrial Technology, Universiti Sains Malaysia, Penang

11800, Malaysia^2

School of Health Sciences, Universiti Sains Malaysia, Kelantan

16150, Malaysia^3

关键词: Depth dose;    Electron-beam parameters;    High energy photons;    MeV-Electrons;    Phantom materials;    Solid water;    Tissue phantom;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/298/1/012038/pdf
DOI  :  10.1088/1757-899X/298/1/012038

来源: IOP

【 摘 要 】

A set of phantom with an external dimension of 30 cm x 30 cm was constructed from tannin-based Rhizophora spp. particleboards similar to the solid water phantoms. The dosimetric characteristics of the particleboard phantoms were evaluated at high energy photons and electrons by measuring the beam output at 6 MV photons and 6 MeV electrons based on the IAEA TRS 398:2000 protocol. The tissue-phantom ratio (TPR20,10) was measured at 6 and 10 MV photons. The beam output calibration of the particleboards was in good agreement to water and solid water phantoms at 6 MV photons with percentage difference of 1.7 and 6.2% respectively. The beam output calibration of the tannin-based Rhizophora spp. particleboards at 6 MeV electrons on the other hand were in excellent agreement to water with percentage difference of 0.3. The percentage depth dose of tannin-based Rhizophora spp. particleboards were in agreement to water and solid water within 4.5% when measured using ionization chamber and EBT2 film. The electron beam parameters of R50, R80and R90at 6 MeV electrons also were in good agreement to water and solid water phantoms. The overall results had indicated the suitability of tannin-based Rhizophora spp. particleboards as water substitute phantom materials for high energy photons and electrons.