Abstract
In external beam radiation therapy, electron and photon beams have extraordinary characteristics in the treatment of cancer. The electron and photon beam characteristic are essential to study before calibration of machine. This study focused on the dosimetric characteristics of different energies of electron beams for different field size. The basic objective of this work is, to calculate dosimetric parameters and characteristics of electron beam, specially depth dose characteristics along central axis. In this work, 6 MeV, 9 MeV, 12 MeV, 15 MeV and 18 MeV of electron beam and 6 MV and 15 MV of photon beam with different field size is used. Characteristics of depth dose of electron and photon beam in water have analyzed to provide better quality of radiation therapy treatment planning. The different beam characteristics are due to different interactions that occurs between electron beams giving them a definite range whereas photon beams are attenuated leading to dose deposition and much larger range with no definite end. Depth dose characteristics of electron and photon beams do not show same characteristics as interaction of beam with matter depends on the quality of beam. Attenuation and penetration factors change with changing dosimetric parameters. Complete analysis of dosimetric characteristics of electron and photon beam help to choose more accurate beam for the treatment of cancer. This work will help to increase accuracy in treatment of cancer with radiotherapy.
Highlights
Radiation therapy is one of the most basic and important treatment than surgery and chemotherapy
Maximum dose is delivered at the surface and rapid dose fall off is observed after the maximum dose, whereas, in case of photon beam, dose decay exponentially due to have different attenuation property
Dosimetric characteristics of electron and photon beam can be evaluated with the study of different constraints
Summary
Radiation therapy is one of the most basic and important treatment than surgery and chemotherapy. High energy radiations are used to damage the DNA of cell and further growth of cell can stop. Radiotherapy treatment needs special care in taking decision and a good judgement in preparing treatment plan for the treatment of cancer [1, 2]. Basic purpose of radiation therapy is to damage cancer cells. Errors and uncertainty in radiation therapy, decrease the degree of accuracy. Many factors like types of tumor, positioning, imaging, diagnosis and uncertainty in normal tissue response, are factors, responsible to deliver accurate dose in radiotherapy [3]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
