[vc_empty_space][vc_empty_space]
Monte carlo simulation of varian clinac iX 10 MV photon beam for small field dosimetry
Yani S.a, Rhani M.F.b, Soh R.C.X., Haryanto F.a, Arif I.a
a Department of Physics, Faculty of Mathematics and Natural Sciences, Institute Technology Bandung, Indonesia
b Department of Radiation Oncology, National University Cancer Institute Singapore, Singapore
c School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Background: The lack of lateral electronic disequilibrium (LED) becomes a main problem in small field. This factor affects the dose in target volume cannot predict correctly. In addi”on, u”liza”on of high-energy linear accelerator (10 MV) can emit some unwanted par”cles (electron contamina”on). Therefore, the aim of this study was to characterize head linear accelerator (linac) Varian Clinac iX 10 MV photon beam for square small field size (1×1, 2×2, 3×3, 4×4 and 5×5 cm2) using Monte Carlo (MC) simula”on. Materials and Methods: The commissioning process for this linac, has been conducted for field size 6×6, 10×10 and 20×20 cm2 by comparing the measurement and MC simula”on data. Head linac simula”on was performed with BEAMnrc and dose calcula”on with DOSXYZnrc. The phase space (phsp) data from BEAMnrc was analyzed using BEAMDP to get the par”cles informa”on in scoring plane. Results and Discussion: The sca6er angle of par”cles depends on the field size. This factor affects the penumbra width in water phantom. On the other hand, PDD data show that the depth of maximum dose and penumbra width in small field shi:ed correspond with the number of sca6er par”cle. The difference of rela”ve output factor between measurement and MC results were found less than 2%. However, the 2% difference was s”ll acceptable in photon beam dosimetry. Conclusion: From this simula”on, the electron contamina”on give contribu”on in surface dose of water phantom about 13.0581% and less than 1% for field size 10×10 cm2 and small field size, respec”vely.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Monte Carlo,Photon beam,Small field dosimetry[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]We are grateful to Tan Tock Seng Hospital, Singapore for the PDD, dose pro?ile data (commissioning process) and OFs for the Varian Trilogy Clinac iX 10 MV photon beam. This study was fully supported by Penelitian Kerjasama Luar Negeri dan Publikasi Internasional Dikti (077/ SP2H/PL/LT/II/2016) and Hibah Penelitian Dis-ertasi Doktor, Ministry of Education Indonesia 2016.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.18869/acadpub.ijrr.15.3.275[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]