Dosimetric characteristics of linear accelerator photon beams with small monitor unit settings

2008 ◽  
Vol 35 (11) ◽  
pp. 5172-5178 ◽  
Author(s):  
Sei-Kwon Kang ◽  
Kwang-Ho Cheong ◽  
Taejin Hwang ◽  
Byung Chul Cho ◽  
Su SSan Kim ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Monitor Unit ◽  
Photon Beams

Dosimetric properties of radiophotoluminescent glass rod detector in high-energy photon beams from a linear accelerator and Cyber-Knife

2004 ◽  
Vol 31 (7) ◽  
pp. 1980-1986 ◽  
Author(s):  
Fujio Araki ◽  
Nobuyuki Moribe ◽  
Toshiaki Shimonobou ◽  
Yasuyuki Yamashita
Keyword(s):  
Linear Accelerator ◽  
High Energy ◽  
High Energy Photon ◽  
Photon Beams ◽  
Energy Photon

scholarly journals Comparative investigation of beam quality index Q on flattening filter and flattening filter free 6 and 15 MV photon beams of an medical linear accelerator

2017 ◽  
Vol 3 (2) ◽  
pp. 287-290
Author(s):  
Michael Schaks ◽  
Johannes Zähle ◽  
Martin Janich ◽  
Patrick Hübsch ◽  
Nico Homonnay ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Quality Index ◽  
Beam Quality ◽  
Comparative Investigation ◽  
Central Axis ◽  
Photon Beams ◽  
Medical Linear Accelerator ◽  
Flattening Filter Free ◽  
Flattening Filter ◽  
Beam Quality Correction Factor

AbstractAn Elekta Synergy LINAC was used to investigate the beam quality index Q and the beam quality correction factor kQ, which is used for absolute dosimetry, in off-axis photon fields. It was found that the beam quality index Q of the photon energies with flattening filter decreases with increasing distance to the central axis, at 6 MV by 4.27% and at 15 MV by 3.98% inside a range of 15 cm off-axis. The beam quality index for flattening filter free photon fields also decreases with increasing distance to the central axis. In this case Q changed only by 1.01% inside the above range.

Optimization of parameters for fitting linear accelerator photon beams using a modified CBEAM model

1989 ◽  
Vol 16 (6) ◽  
pp. 896-901 ◽  
Author(s):  
Komanduri Ayyangar ◽  
Inder Daftari ◽  
Jatinder Palta ◽  
Nagalingam Suntharalingam
Keyword(s):  
Linear Accelerator ◽  
Photon Beams ◽  
Optimization Of Parameters

Commissioning and evaluation of a radiochromic EBT3 film dosimetry system

2018 ◽  
Vol 18 (1) ◽  
pp. 55-62
Author(s):  
Muhammad Isa Khan ◽  
Muhammad Bilal Tahir ◽  
Muhammad Rafique ◽  
Tahir Iqbal ◽  
Sabiha Zulfiqar ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Cost Effective ◽  
World Health Organisation ◽  
Radiochromic Film ◽  
World Health ◽  
Film Dosimetry ◽  
Photon Beams ◽  
Output Measurement ◽  
Ionisation Chamber ◽  
Dosimetry System

AbstractPurposeThis work reports our study to commission a radiochromic film dosimetry system using the timely EBT3 film. We carried out dosimetric evaluations on different characteristics of photon beams (e.g., flatness, symmetry and penumbra) in radiation dose delivery.Materials and MethodsA Varian linear accelerator producing 6 and 15 MV photon beams with 120 multi-leaf collimator was used in this study. PTW ionisation chamber was used to measure the beam characteristics such as symmetry, flatness and penumbra and these measurements were used to commission the radiochormic EBT3 film dosimetry system. The results of irradiated films were analysed using the radiochromic film QA Pro software 2016.ResultsThe measured film doses were analysed at two different colour channels (green and red) using two scanning geometries (i.e., upper or lower side of film facing the scanner light source) at two dose levels (10 and 40 Gy). The difference between the ionisation chamber and film results was found insignificant and within the acceptable range as per the World Health Organisation standard.ConclusionResults of the comparison between the ionisation chamber and film measurements show that our radiochormic EBT3 film dosimetry system is reliable and cost-effective in the output measurement of a linear accelerator. Our measurements confirm that our EBT3 film dosimetry agreed well with the ionisation chamber, and can be used as a re-validation tool for linear accelerator quality control.

Corner transmission in several linear accelerator photon beams

1991 ◽  
Vol 18 (4) ◽  
pp. 763-764
Author(s):  
Satish C. Prasad ◽  
Daniel A. Bassano
Keyword(s):  
Linear Accelerator ◽  
Photon Beams
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