TY - JOUR ID - 12642 TI - Influence of Compensator Thickness and Field Size on Buildup factor of a Brass Compensator for Intensity- Modulated Radiation Therapy JO - Iranian Journal of Medical Physics JA - IJMP LA - en SN - AU - Balvasi, Elnaz AU - Haghparast, Abbas AU - Hejazi, Peyman AD - Master of Medical Physics, Department of Medical Physics, Semnan University of Medical Sciences, Semnan, Iran Email: e_balvasi.ph87@yahoo.com, Tel: +98 9169600536 AD - Doctor of Medical Physics, Department of Medical Physics, Kermanshah University of Medical Sciences, Kermanshah, Iran AD - Doctor of Medical Physics, Department of Medical Physics, Semnan University of Medical Sciences, Semnan, Iran Y1 - 2018 PY - 2018 VL - 15 IS - Special Issue-12th. Iranian Congress of Medical Physics SP - 148 EP - 148 KW - Intensity Modulated Radiation Therapy Compensator Buildup factor DO - 10.22038/ijmp.2018.12642 N2 - Introduction: Radiotherapy is one of the effective methods in the treatment of cancer. In the recent methods of radiotherapy, intensity modulated radiotherapy (IMRT) technique by compensators is used. when photon beam passes the compensator, scattered photons can be generated within the compensator. The presence of scattered photons may complicate the design of compensators as well as the subsequent calculations of dose distributions. The buildup factor, ‘B’, is one of these important properties of a material to be used for compensator construction. It directly affects the dose quantity. Materials and Methods: Radiotherapy is one of the effective methods in the treatment of cancer. In the recent methods of radiotherapy, intensity modulated radiotherapy (IMRT) technique by compensators is used. when photon beam passes the compensator, scattered photons can be generated within the compensator. The presence of scattered photons may complicate the design of compensators as well as the subsequent calculations of dose distributions. The buildup factor, ‘B’, is one of these important properties of a material to be used for compensator construction. It directly affects the dose quantity. Results: Our results indicated that the compensator thickness and field size have the most significant effect on the calculation of buildup factor for the 6-MV photon beam. Conclusion: Influence of compensator thickness and field size on calculation buildup factor can reduce the error due to delivered dose to target volume and organs at risk UR - https://ijmp.mums.ac.ir/article_12642.html L1 - ER -