Prof. Mehmet Haberal is presented with The Award of The Spanish Order of The Civil Merit (Cruz de Official) by His Majesty King Felipe VI, King of Spain.
We are honored to announce that Prof. Dr. Seza Özen who is the member of Honorary Advisory Board of JBACHS has already won the Aziz Sancar Science Award of TUSEB.
We are happy to announce that The Journal of Basic and Clinical Health Sciences (JBACHS) is indexed by the Emerging Sources Citation Index since November 2017, and indexed by the Ulakbim-TR since 2017.
Journal of Basic and Clinical Health Sciences 2020 , Vol 4 , Issue 1
Simulation of Water Equivalency of Polymer Gel Dosimeters with GAMOS
Türkan Özbay1,2,Ayşegül Yurt2,3,İsmail Özsoykal2
1Izmir University of Economics, Vocational School of Health Services, İzmir,Turkey
2Dokuz Eylul University, Department of Medical Physics, İzmir, Turkey
3Dokuz Eylul University, Vocational School of Health Services, İzmir, Turkey
DOI : 10.30621/jbachs.2020.899

Purpose: Polymer gel materials are used as dosimeters to provide three dimensional radiation dose distribution. An ideal gel dosimeter should offer radiological properties equivalent to water. This study aims to determine and compare the water equivalencies of various new polymer gel mixtures using Geant4-based Architecture for Medicine-Oriented Simulations (GAMOS) software program.

Methods: To do this, percentage depth dose curves of the simulated polymer gel mixtures were compared with water curves. Different combinations of materials from 2 main classes were used in the mixtures: (1) Sodium Carboxymethyl Cellulose (SODIUM CMC), Polyvinyl Alcohol (PVA) and Polyethylene Glycol (PEG) as gel matrix, (2) 2-Hydroxyethyl Methacrylate (HEMA), 1-Vinyl-2-Pyrrolidinone (VP) and Diethylene Glycol Dimethacrylate (DEGDMA) as monomer. Each mixture also contained ultra-pure water and an antioxidant material called Tetrakis Hydroxymethyl Phosphonium Chloride (THPC).

Results: Percentage depth doses of gel mixtures and water was calculated for 6, 18 MV and 50, 70, 100, 150 kVp X rays. The mixture sample showing radiological behavior nearest to water over all energies was observed to be 31a (Water, PEG, HEMA, THPC), while the largest difference is observed in 11a (Water, SODIUM CMC, HEMA, THPC).

Conclusion: As a result, simulated gel formulations were found to be radiologically water equivalent. 

Keywords : Polymer gel, Dosimeter, Monte Carlo, GAMOS, Simulation