scholarly journals Open beam dosimetric characteristics of True Beam medical linear accelerator with flattening filter (WFF) and flattening filter free (FFF) beam

2018 ◽  
Vol 24 (2) ◽  
pp. 79-89 ◽  
Author(s):  
Karthick Raj Mani ◽  
Md Anisuzzaman Bhuiyan ◽  
Md. Shakilur Rahman ◽  
S. M. Azharur Islam

Abstract True Beam medical linear accelerator is capable of delivering flattening filter free (FFF) and with flattening filter (WFF) photon beams. True Beam linear accelerator is equipped with five photon beam energies (6 FFF, 6 WFF, 10 FFF, 10 WFF and 15 WFF) as well as six electron beam energies (6 MeV, 9 MeV, 12 MeV, 15 MeV and 18 MeV). The maximum dose rate for the 6 WFF, 10 WFF and 15 WFF is 600 MU/min, whereas 6 FFF has a maximum dose rate of 1400 MU/min and 10 FFF with a maximum dose rate of 2400 MU/min. In this report we discussed the open beam dosimetric characteristics of True Beam medical linear accelerator with FFF and WFF beam. All the dosimetric data (i.e. depth dose, cross-line profiles, diagonal profiles, output factors, MLC transmission, etc.) for 6 MV, 6 FFF, 10 MV, 10 FFF and 15 MV were measured and compared with the published data of the True Beam. Multiple detectors were used in order to obtain a consistent dataset. The measured data has a good consistency with the reference golden beam data. The measured beam quality index for all the beams are in good agreement with the published data. The percentage depth dose at 10 cm depth of all the available photon beams was within the tolerance of the Varian acceptance specification. The dosimetric data shows consistent and comparable results with the published data of other True Beam linear accelerators. The dosimetric data provide us an appreciated perception and consistent among the published data and may be used for future references.

2018 ◽  
Vol 45 (6) ◽  
pp. 2369-2376 ◽  
Author(s):  
Tucker Netherton ◽  
Yuting Li ◽  
Paige Nitsch ◽  
Simona Shaitelman ◽  
Peter Balter ◽  
...  

2017 ◽  
Vol 3 (2) ◽  
pp. 287-290
Author(s):  
Michael Schaks ◽  
Johannes Zähle ◽  
Martin Janich ◽  
Patrick Hübsch ◽  
Nico Homonnay ◽  
...  

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.


2014 ◽  
Vol 19 (5) ◽  
pp. 322-331 ◽  
Author(s):  
A. Pichandi ◽  
Kadirampatti Mani Ganesh ◽  
Amalraj Jerin ◽  
Karunakaran Balaji ◽  
Gurunath Kilara

2009 ◽  
Vol 54 (5) ◽  
pp. 1265-1273 ◽  
Author(s):  
Stephen F Kry ◽  
Rebecca M Howell ◽  
Jerimy Polf ◽  
Radhe Mohan ◽  
Oleg N Vassiliev

2019 ◽  
Vol 4 (4) ◽  
pp. 571-578 ◽  
Author(s):  
Andrew R. Barsky ◽  
Fionnbarr O'Grady ◽  
Christopher Kennedy ◽  
Neil K. Taunk ◽  
Lei Dong ◽  
...  

2017 ◽  
Vol 42 (2) ◽  
pp. 65
Author(s):  
Tomohiro Shimozato ◽  
Yuichi Aoyama ◽  
Takuma Matsunaga ◽  
Katsuyoshi Tabushi

Sign in / Sign up

Export Citation Format

Share Document