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Journal of Medical Physics and Applied Sciences
ISSN: 2574-285X
I n t e r n a t i o n a l C o n f e r e n c e o n
Nuclear Medicine &
Radiation Therapy
Nuclear Medicine & Radiation Therapy 2018
O c t o b e r 0 1 - 0 2 , 2 0 1 8
S t o c k h o l m , S w e d e n
A
radiation colour former of amino fluoran dye, pergascript orange (PGO), in polyvinyl butyral solution containing a colour
developer, hexachloroethane (HCE), was prepared and investigated for radiotherapy dosimetry of
60
C
o
, 6 MV and 15 MV
photons. PGO, a colourless fluoran compound, reacts with acid produced by radiation exposure of HCE, enabling the lactone
ring to open and the orange colour of PGO to develop. This was confirmed by detecting a peak at 490 nm with two shoulders at
523 nm and 460 nm upon irradiation of the dosimeter solutions. The ring opening of PGO was also confirmed by appearance of
a broad peak of OH- at 3360 cm
-1
, C=O carboxylic at 1763 cm
-1
, and Iminium group at 1640 cm
-1
. Dose response functions of all
prepared compositions are linear in the dose range of 1-20 Gy. Increasing HCE in the dosimeter matrixes enhanced significantly
the radiation sensitivity. With an increase of HCE from 0.063 M to 0.106 M, the radiation sensitivity increases by 57.76%. The
experimental results reveal an energy independent response in the range of 1.33-15 MeV. Based on a theoretical study, this
dosimeter is water equivalent in the energy range from 80 keV to 20 MeV. The effective atomic number of the present dosimeter
is 7.2 and comparable with water, where the effective atomic number is 7.4. Finally, the uncertainty parameters in absorbed dose
were discussed and the overall uncertainty was found to be 4.3% at 95% confidence level.
Yasser_shabaan@hotmail.comPergascript orange based polymeric solution as a
dosimeter for radiotherapy treatment planning
Yasser S Soliman
1,3
, W B Beshir
1
, Mahmoud H Abdelgawad
2
,
Elke Brauer Krisch
3
and A A Abdel-Fattah
1
1
National Centre for Radiation Research and Technology (NCRRT)-EAEA, Egypt
2
Al-Azhar University, Cairo, Egypt
3
The European Synchrotron (ESRF), France
J. med phys & appl sci 2018, Volume: 3
DOI: 10.21767/2574-285X-C1-003