FABRICATION AND OPTIMIZATION OF A PAGATA GEL DOSIMETER: INCREASING THE MELTING POINT OF THE PAGAT GEL DOSIMETER WITH AGAROSE ADDITIVE

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AZADBAKHT BAKHTIAR; ZAHMATKESH MOHAMMAD HASSAN; HADDAD KAMAL; BAGHERI SAEID

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Journal: IRANIAN JOURNAL OF MEDICAL PHYSICS Year:2011 | Volume:7 | Issue:4 (29) Page(s): 1-6

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Title

FABRICATION AND OPTIMIZATION OF A PAGATA GEL DOSIMETER: INCREASING THE MELTING POINT OF THE PAGAT GEL DOSIMETER WITH AGAROSE ADDITIVE

Author(s)

AZADBAKHT BAKHTIAR | ZAHMATKESH MOHAMMAD HASSAN | HADDAD KAMAL | BAGHERI SAEID | Issue Writer Certificate

Keywords

MRI GEL DOSIMETRYQ3

MELTING POINTQ3

PAGATQ3

PAGATA GEL DOSIMETERQ3

Abstract

Introduction: The PAGAT polymer gel dosimeter melts at 30oC and even at room temperature during the summer, so it needs to be kept in a cool place such as a refrigerator. To increase the stability of the PAGAT gel, different amounts of agarose were added to the PAGAT gel composition and the PAGATA gel was manufactured. Material and Methods: The PAGATA gel vials were irradiated using a Co-60 machine. Then, the samples were evaluated using a 1.5 T Siemens MRI scanner. The ingredients of the PAGATA normoxic gel dosimeter were 4.5% N-N' methylen-bis-acrylamide, 4.5% acrylamide, 4.5% gelatine, 5 mM tetrakis (THPC), 0.01 mM hydroquinone (HQ), 0.5% agarose and 86% de-ionized water (HPLC). Results: MELTING POINT and sensitivity of the PAGAT gel dosimeter with addition of 0.0, 0.3, 0.5, 1.0, 1.5 and 2.0% of agarose were measured, in which the MELTING POINTs were increased to 30, 82, 86, 88, 89 and 90oC and their sensitivities found to be 0.113, 0.1059, 0.125, 0.122, 0.115 and 0.2 S-1 Gy-1 respectively.Discussion and Conclusions: Adding agarose increased the sensitivity and background R2 of the evaluated samples. The optimum amount of agarose was found to be 0.5% regarding these parameters and also the MELTING POINT of the gel dosimeter. A value of 0.5% agarose was found to be an optimum value considering the increase of sensitivity to 0.125 and MELTING POINT to 86°C but at the expense of increasing the background R2 to 4.530.

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APA: Copy

AZADBAKHT, BAKHTIAR, ZAHMATKESH, MOHAMMAD HASSAN, HADDAD, KAMAL, & BAGHERI, SAEID. (2011). FABRICATION AND OPTIMIZATION OF A PAGATA GEL DOSIMETER: INCREASING THE MELTING POINT OF THE PAGAT GEL DOSIMETER WITH AGAROSE ADDITIVE. IRANIAN JOURNAL OF MEDICAL PHYSICS, 7(4 (29)), 1-6. SID. https://sid.ir/paper/97012/en

Vancouver: Copy

AZADBAKHT BAKHTIAR, ZAHMATKESH MOHAMMAD HASSAN, HADDAD KAMAL, BAGHERI SAEID. FABRICATION AND OPTIMIZATION OF A PAGATA GEL DOSIMETER: INCREASING THE MELTING POINT OF THE PAGAT GEL DOSIMETER WITH AGAROSE ADDITIVE. IRANIAN JOURNAL OF MEDICAL PHYSICS[Internet]. 2011;7(4 (29)):1-6. Available from: https://sid.ir/paper/97012/en

IEEE: Copy

BAKHTIAR AZADBAKHT, MOHAMMAD HASSAN ZAHMATKESH, KAMAL HADDAD, and SAEID BAGHERI, “FABRICATION AND OPTIMIZATION OF A PAGATA GEL DOSIMETER: INCREASING THE MELTING POINT OF THE PAGAT GEL DOSIMETER WITH AGAROSE ADDITIVE,” IRANIAN JOURNAL OF MEDICAL PHYSICS, vol. 7, no. 4 (29), pp. 1–6, 2011, [Online]. Available: https://sid.ir/paper/97012/en

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