SCATTERING OF THE EXIT BEAM AT THE PATIENT–CASSETTE FRONT MATERIAL INTERFACE BY EBONY WOOD
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Abstract
Background: As part of the search for substitute materials for use as radiographic equipment accessories in developing countries, scattering of the exit beam at phantom-material (simulating the patient-cassette) interface has been investigated for Ebony wood and aluminium, for comparison, using thermoluminescent detectors (TLD).
Purpose: To investigate the scattering of the exit beam at the phantom-material interface for Ebony wood and aluminium, and assess the potential of Ebony wood as a substitute radiographic accessory.
Materials and Methods: Thermoluminescent detectors (TLD) were used to measure exit beam scattering at the phantom-material interface under varying tube potentials and radiation field sizes. Statistical analysis for independent samples was conducted to determine significance at the 95% confidence interval.
Results: Results showed that there was no statistical difference in the scattering of the exit beam towards the phantom by the two tested materials (P = 0.3) with changes in tube potential. Variation of radiation field size, however, produced a marked difference.
Conclusion: Ebony wood may be used as a substitute for aluminium as a radiographic accessory, subject to further radiographic tests and confirmation.
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References
United Nations Scientific Committee on the Effects of Atomic Radiation. Sources and Effects of Ionizing Radiation: Report to the General Assembly, with Scientific Annexes. 2000.
Forest Products Society. Wood Handbook: Wood as an Engineering Material. Madison, WI: Forest Products Society; 1974.
Panshin, A.J., de Zeeuw, C. Textbook of Wood Technology. 4th ed. New York: McGraw-Hill Book Company; 1980.
Egbe, N.O., Olisemeke, B.F., Inyang, S.O., Chiaghanam, N.O., Ikamaise, V.C. A study of the linear attenuation property of some materials and their influence on radiographic contrast. IRPS Bulletin. 2005;19(3):12–15.
Speller, R.D., Horrocks, J.A. Photon scattering—a ‘new’ source of information in medicine and biology? Phys. Med. Biol. 1991;36(1):1–6.
Delichas, M.G., Psarrakos, K., Giannoglou, G., Molyvda-Athanasopoulou, E., Hatziioannou, K., Papanastassiou, E. Skin doses to patients undergoing coronary angiography in a Greek hospital. Radiation Protection Dosimetry. 2005;113(4):449–452.
Das, I.J., Chopra, K.L. Backscatter dose perturbation in kilovoltage photon beams at high atomic number interfaces. Med. Phys. 1995;22(6):767–773.
Das, I.J. Forward dose perturbation at high atomic number interfaces in kilovoltage X-ray beams. Med. Phys. 1997;24(11):1781–1787.
Ullman, G., Sandborg, M., Dance, D.R., Hunt, R., Carlsson, G.A. Distributions of scatter-to-primary and signal-to-noise ratios per pixel in digital chest imaging. Radiation Protection Dosimetry. 2005;114(1–3):355–358.
Malusek, A., Seger, M.M., Sandborg, M., Carlsson, G.A. Effect of scatter on reconstructed image quality in cone beam computed tomography: evaluation of a scatter-reduction optimization function. Radiation Protection Dosimetry. 2005;114(1–3):337–340.
Leclair, R.J., Johns, P.C. A semi-analytic model to investigate the potential applications of X-ray scatter imaging. 1998.
Grosswendt, B. Dependence of the photon backscatter factor for water on the source-to-phantom distance and irradiation field size. Phys. Med. Biol. 1990;35(9):1233–1245.
White, D.R. An analysis of the Z-dependence of photon and electron interactions. Phys. Med. Biol. 1977;22(2):219–228.
Archer, B.R., Fewell, T.R., Conway, B.J., Quinn, P.W. Attenuation properties of diagnostic X-ray shielding materials. Med. Phys. 1994;21(9):1499–1507.
Tokita, N., Akune, Y., Egawa, S., Raju, M.R. Biological dosimetry for iodine contrast medium and X-ray interactions by cell survival. BJR. 1990;63:735–737.
Niroomand-Rad, A., Razavi, R., Thobejane, S., Harter, K.W. Radiation dose perturbation at tissue–titanium dental interfaces in head and neck cancer patients. Int. J. Radiat. Oncol. Biol. Phys. 1996;34(2):475–480.
Zellmer, D.L., Chapman, J.D., Sobbe, C.C., Xu, F., Das, I.J. Radiation fields backscattered from material surfaces: I. Biological effectiveness. Radiat. Res. 1998;150(4):406–415.
Regulla, D.F., Hieber, L.B., Siendenbusch, M. Physical and biological interface dose effects in tissue due to X-ray release of secondary radiation from metallic gold surfaces. Radiat. Res. 1998;150(1):92.
Nicopoulou-Karavianni, K., Koligliatis, T., Donta-Bakogianni, C., Karaviannis, A., Litsas, J. Radiation absorbed doses at compact bone–titanium interfaces in diagnostic radiography: a Monte Carlo approach. Dentomaxillofac Radiol. 2003;32(5):327–332.
Podgorsak, M.B., Schreiner, L.J., Podgorsak, E.B. Surface doses in intracavity orthovoltage radiotherapy. Med. Phys. 1990;17:635–640.
Aldrich, J.E., Meng, J.S., Andrew, J.W. Surface doses from orthovoltage X-ray treatments. Medical Dosimetry. 1992;17:69–72.
Dendy, P.P., Heaton, B., editors. Physics for Diagnostic Radiology. Bristol and Philadelphia: Institute of Physics Publishing; 1999.
Hoag, M.L., Krahmer, R.L. Polychromatic X-ray attenuation characteristics and wood densitometry applications. Wood and Fiber Science. 1991;23(1):23–31.
Conway, B.J., Duff, J.E., Fewell, T.R., Jennings, R.J., Rothenberg, L.N., Fleischman, R.C. A patient equivalent attenuation phantom for estimating patient exposure from automatic exposure-controlled X-ray examination of the abdomen and lumbar spine. Med. Phys. 1990;17(3):448–453.
Kuon, E., Glaser, C., Dahm, J.B. Effective techniques for reduction of radiation dosage to patients undergoing invasive cardiac procedures. Br. J. Radiol. 2003;76:406–413.
Lee, S.C., Wang, J.N., Liu, S.C., Jiang, S.H. Effective dose evaluation for chest and abdominal X-ray tests. Radiation Protection Dosimetry. 2005;116(1–4):613–619.
Wade, J.P., Goldstone, K.E., Dendy, P.P. Patient dose measurement and dose reduction in East Anglia (UK). Radiation Protection Dosimetry. 1995;57(1–4):445–448.
Mohammadain, K.E.M., da Rosa, L.A.R., Azevedo, A.C.P., Guebel, M.R.N., Boehat, M.C.B., Habain, F. Dose evaluation for paediatric chest X-ray examinations in Brazil and Sudan: low doses and reliable examinations can be achieved in developing countries. Phys. Med. Biol. 2004;49:1017–1031.
Hufton, A.P., Russell, J.G. The use of carbon fibre material in tabletops, cassette fronts, and grid covers: magnitude of possible dose reduction. BJR. 1986;59(698):157–163.