Volume 5, Number 1 (6-2006)                   JRUMS 2006, 5(1): 7-10 | Back to browse issues page


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Mowlavi A, Binesh A. The Calculation of Absorbed Dose from 131I Radioactive Source in Thyroid Using MCNP Code for Spherical and Cylindrical Fields. JRUMS. 2006; 5 (1) :7-10
URL: http://journal.rums.ac.ir/article-1-142-en.html

Abstract:   (8655 Views)

  The Calculation of Absorbed Dose from 131I Radioactive Source in Thyroid Using MCNP Code for Spherical and Cylindrical Fields

 

  AA. Mowlavi PhD [1] , AR. Binesh MSc [2]

Background and Objective: 131 I radionuclide has been widely used for treatment of thyroid cancer and hyperactivity. In this regard the accurate calculation of absorbed dose in thyroid gland and other organs is important. Materials and Methods: In this study, according to MIRD method, MCNP code was used for calculation of absorbed dose of 131I radioactive sources in any thyroid with specific mass and size. Results: The results of two different geometries spherical and cylindrical shapes for each lobe of thyroid were compared. The results show when the thyroid mass increase from 20gr to 70gr, the absorbed dose per one disintegration increases 4.2%.

  Conclusion: These results firstly indicate that instead of using the total mass of thyroid in iodine therapy, it would be better to use the calculated active mass of thyroid. Secondly, the variation of absorbed dose per disintegration of 131I should be considered for the measurement of source activity in treatment of thyroid hyperactivity or cancer.

 

  Key words: Absorbed dose 131I radionuclide MIRD method MCNP code Thyroid gland



  [1] - Assistant Professor, Dept. of Physics, School of Sciences, Tarbiat Moallem University of Sabzevar,SZabzevar

 (Corresponding Author) Tel: (0 571) 4410105, Fax: (0 571) 4411161, E-mail: amowlavi@sttu.ac.ir

  [2] - Academic Member, Dept. of Physics, Payam-Nour University of Fariman, Fariman

Full-Text [PDF 367 kb]   (1526 Downloads)    
Type of Study: Research | Subject: Physics
Received: 2006/07/26

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