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Determination of Dosimetric Parameters of New Brachytherapy Seed (125IrSeed) Using EBT Radiochomic Film and TL Dosimeters
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V Lohrabian *   1, Sh Sheibani , Mr Aghamiri , B Ghozati , H Pourbeigi , M Havasian |
| 1- , vahidlohrabian@yahoo.com |
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Abstract: (14922 Views) |
| Introduction: Low dose rate brachytherapy sources have been used widely for interst-itial implants in tumor sites, particularly in prostate cancer. Recently, several new desi-gns of 125I and 103Pd sources have become commercially available for clinical appli-cations.
Materials & Methods: In this research, dosimetric characteristics of a new IrSeed 125I brachytherapy source has been deter-mined using LiF thermoluminescent(TLD) chips and EBT radiochromic film. Dose distributions around the IrSeed 125I source were measured in a Plexiglass phantom using TLD-100 LiF thermoluminescent dosimeters and EBT radiochromic film.
Findings: Quantities such as radial dose fu-nction, g(r) for distances 2,3 and 5 cm, and anisotropy function, F(r,θ), for angels 0-180º were experimentally determined and the geometry function, G(r,θ), was calcul-ated.
Discussion & Conclusion: The dose rate constant, Λ, was measured to be 0.965±0.06 cGyh-1U-1. The dosimetric par-ameters that have presented for this new source, may have many clinical appli-cations. |
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| Keywords: 125I, Dosimetry, Dose rate cons-tant, TLD, EBT radiochromic film |
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Full-Text [PDF 612 kb]
(3355 Downloads)
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Type of Study: Research |
Subject:
biophysics
Received: 2013/05/19 | Accepted: 2013/09/1 | Published: 2013/09/1
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