Authors
1 School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia+School of Health Sciences, Universiti Sains Malaysia, 16150 Kelantan, Malaysia
2 School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia
3 School of Industrial Technology, Universiti Sains Malaysia, 11800 Penang, Malaysia
4 Medical Physics Group, Malaysian Nuclear Agency, 43000 Selangor, Malaysia
Abstract
Phantom materials are important tools for quality control and dosimetry works in medical physics. The tannin-bonded Rhizophora spp. particleboards in were fabricated as phantom and the dosimetric properties at high energy photons and electrons were evaluated. The particleboards were fabricated at dimensions of 30 x 30 x 1 cm3 and target density of 1.0 g/cm3 based on the commonly used solid water phantoms in radiotherapy. The effective atomic number of the particleboard was determined based on the elemental compositions measured using energy dispersive x-ray analysis (EDXA). The mass attenuation coefficients at high energy photon were measured at 16.59-25.26 keV photons and 60Co and 137Cs gamma energies. The percentage depth dose and beam parameters of the particleboards were measured at 6 MV photons and 6 MeV electrons using Gafchromic EBT2 film and treatment planning system (TPS) software. The results showed that the effective atomic number and electron density of the particleboards were close to the value of water. The mass attenuation coefficient at high energy photons were close to the XCOM value of water. The percentage depth dose at high energy photons and electrons showed an agreement to the value in water and solid water phantom within 10% at all measured depths. The overall results indicated the suitability of tannin-bonded Rhizophora spp. as phantom material for high energy photons and electrons.
Keywords
- Khan, M. F., 2010. The physics of radiation therapy, Lippincott William & Wilkins, Philadelphia
- Bradley, D. A., Tajuddin, A. A., Che Wan Sudin, C. W. A., and Bauk, S. 1991,. Photon attenuation studies on tropical hardwoods. International Journal of Radiation Applications and Instrumentation. Part A. Appl. Radiat. Isotopes 42: 771-773.
- Tajuddin, A. A., Che Wan Sudin, C. W. A. and Bradley, D. A., 1996. Radiographic and scattering investigation on the suitability of Rhizophora spp. as tissue equivalent medium for dosimetric study. Radiat. Phys. Chem. 47: 739-740.
- Banjade, D. P., Tajuddin, A. A., and Shukri, A., 2000. A study of Rhizophora spp. wood phantom for dosimetric purposes using high-energy photon and electron beams, Appl. Radiat. Iso., 55: 297-302.
- Shakhreet, B. Z., Bauk, S., Tajuddin, A. A., and Shukri, A. ,2009. Mass attenuation coefficnet on natural Rhizophora spp. woods for X-rays in the 15.77 to 25.27 keV range Radiat. Prot. Dosim. 135: 4-53.
- Marashdeh, M. W., Hashim, R., Tajuddin, A. A., Bauk, S., and Sulaiman, O., 2011. Effect of particle size on the characterization of binderless particleboard made from Rhizophora spp. Mangrove wood for use as phantom material Bioresource Technol. 6: 4028-4044.
- Ngu, K. T., Bauk, S., Hashim, R., Tajuddin, A. A., and Shukri, A., 2015. Fabrication of formaldehyde-based particleboards and their mass attenuation coefficients at 15.77, 17.48, 21.18 and 25.27 keV photon energies. Journal of Physical Sciences, 26 (1): 27-33.
- Surani, B. T., 2008. The Suitability of PF, UF and PRF Resins in Term of Structure and Attenuation Properties to be Used in Rhizophora spp. Particleboard Phantom. M.Sc. Thesis, Universiti Sains Malaysia.
- Ababneh, B., Tajuddin, A. A., Hashim, R., and Shuaib, I. L., 2016. Investigation of mass attenuation coefficient of almond gum bonded Rhizophora spp. particleboard as equivalent human tissue using XRF technique in the 16.6-25-25.23 keV photon energy. Australas. Phys. Eng. Sci., 39 (4): 871-876.
- Abu Arra, A., Hashim, R., Bau,k S., Kandaiya, S., and Tousi. E.T., 2014. Fabrication and characterization of gum Arabic bonded Rhizophora spp. particleboards, Mater. Des., 60: 108-115.
- Tousi, E. T., Bauk, S., Hashim, R., Jaafar, M. S, Abuarra, A., 2014. Measurement of mass attenuation coefficients of Eremurus-Rhizophora spp. particleboards for X-ray in the 16.63-25.30 keV energy range. Radiat. Phys. and Chem. 103: 119-125.
- Pizzi, A. and Scharfetter, H., 1989. Adhesives and techniques open new possibilities for the wood processing industry. Part1: Experience with tannin based adhesives. Eur. J. Wood Wood Prod., 39: 85–89.
- Pizzi, A. and Merlin, M., 1981. A new class of tannins adhesives for exterior particleboard. Int. J. Ahhes. Adhes. 1(5): 261–264.
- Safian, A., 2012. Tannin-based Rhizophora spp. Particleboard Breast Phantom at Mammographic Energy. M.Sc. Thesis, Universiti Sains Malaysia.
- AAPM-21, 1983. Protocol for the determination of absorbed dose from high energy photon and electron beams; Task Group 21 Med. Phys., 10: 741-771.
- Duvauchelle, P., Peix, G., and Babot, D., 1999. Effective atomic number in the Rayleigh to Compton scattering ratio. Nucl. Instrum. Methods Section B: Beam Interactions with Materials and Atoms, 155: 221-228.
- Brown, S., Bailey, D. L., Willowson, K., and Baldock, C., 2008. Investigation of the linear relationship between linear attenuation coefficients and CT Hounsfield units using radionuclides for SPECT, Appl. Radiat. Isotopes, 66: 1206-1212.
- Berger, M. J. and Hubbell, J. H., 1987. XCOM: Photon cross-sections on a personal computer. NBSIR 87-3597.
- Marashdeh, M. W., Bauk, S., Tajuddin, A. A., and Hashim, R., 2012. Measurement of mass attenuation coefficients of Rhizophora spp. binderless particleboards in the 16.59–25.26 keV photon energy range and their density profile using x-ray computed tomography, Appl. Radiat. Isotopes, 70: 656-662.
- Chang, L., Ho, S. Y., Lee, T. F., Yeh, S. A., Ding, H. J. and Chen, P. Y., 2015. The suitable dose range for the calibration of EBT2 film by the PDD method with a comparison of two curve fitting algorithms. Physics Research A, 777: 85-90.
- Kurudirek, M., 2014. Effective atomic numbers and electron densities of some human tissues and dosimetric materials for mean energies of various radiation sources relevant to radiotherapy and medical applications Radiation Phys. Chem., 102: 139-146
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