THE EFFECT OF PHYSICAL CHARACTERISTICS OF SPINAL IMPLANTS ON SPINAL CORD DOSE DISTRIBUTION

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ALINEJAD MARJAN; SHOKRANI PARVANEH; AMOUHEIDARI ALIREZA; ATAROD MARYAM

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Journal: JOURNAL OF ISFAHAN MEDICAL SCHOOL (I.U.M.S) Year:2013 | Volume:31 | Issue:262 Page(s): 1919-1931

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Title

THE EFFECT OF PHYSICAL CHARACTERISTICS OF SPINAL IMPLANTS ON SPINAL CORD DOSE DISTRIBUTION

Author(s)

ALINEJAD MARJAN | SHOKRANI PARVANEH | AMOUHEIDARI ALIREZA | ATAROD MARYAM | Issue Writer Certificate

Keywords

SPINAL IMPLANTSQ2

SPINAL RADIATION THERAPYQ2

DOSE DISTRIBUTIONQ2

MONTE CARLO SIMULATIONQ2

Abstract

Background: In radiotherapy, the presence of metallic implants affects the DOSE DISTRIBUTION, depending on beam energy and type, size, material and position of the implant. In this study, the effect of SPINAL IMPLANTS on DOSE DISTRIBUTION was evaluated by MONTE CARLO SIMULATION.Methods: Oncor accelerator and water phantom, Plexiglas phantom containing spine and Plexiglas phantom containing spine and rod implants were simulated using BEAMnrc and DOSXYZnrc user codes and were validated. The effect of the implant presence, its size material, and location on DOSE DISTRIBUTION was investigated.Findings: Comparison of DOSE DISTRIBUTIONs with and without implants showed an increase of 5.5% in dose up to 4 mm from metal surface, due to the back scattering of electrons. Maximum attenuation in titanium rods was 9%. When the rods were positioned closer to each other, an increase in attenuation was observed. However, dose in spine was increased, when the distance between rods and spine was reduced. Rods with smaller cross section had less effect on dose. Attenuation in vitallium and stainless steel implants were 2 times greater than titanium implants.Conclusion: Depending on the location of implant with respect to spine, dose perturbation due to implants can either increase or decrease the dose in spine. The effect of size and material of implant was more important when spine was located under the implant. Generally, the effect of spinal implant on DOSE DISTRIBUTION is a function of size, material and position of the implant. Therefore, it is recommended to evaluate the DOSE DISTRIBUTION for such patients individually.

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APA: Copy

ALINEJAD, MARJAN, SHOKRANI, PARVANEH, AMOUHEIDARI, ALIREZA, & ATAROD, MARYAM. (2013). THE EFFECT OF PHYSICAL CHARACTERISTICS OF SPINAL IMPLANTS ON SPINAL CORD DOSE DISTRIBUTION. JOURNAL OF ISFAHAN MEDICAL SCHOOL (I.U.M.S), 31(262), 1919-1931. SID. https://sid.ir/paper/51132/en

Vancouver: Copy

ALINEJAD MARJAN, SHOKRANI PARVANEH, AMOUHEIDARI ALIREZA, ATAROD MARYAM. THE EFFECT OF PHYSICAL CHARACTERISTICS OF SPINAL IMPLANTS ON SPINAL CORD DOSE DISTRIBUTION. JOURNAL OF ISFAHAN MEDICAL SCHOOL (I.U.M.S)[Internet]. 2013;31(262):1919-1931. Available from: https://sid.ir/paper/51132/en

IEEE: Copy

MARJAN ALINEJAD, PARVANEH SHOKRANI, ALIREZA AMOUHEIDARI, and MARYAM ATAROD, “THE EFFECT OF PHYSICAL CHARACTERISTICS OF SPINAL IMPLANTS ON SPINAL CORD DOSE DISTRIBUTION,” JOURNAL OF ISFAHAN MEDICAL SCHOOL (I.U.M.S), vol. 31, no. 262, pp. 1919–1931, 2013, [Online]. Available: https://sid.ir/paper/51132/en

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