SU-E-T-706: Small Field Dosimetry: Output Factors for Fixed Cones, Iris Collimator and MLC Fields for the CyberKnife M6™ System with Newly Released InCise™ Multileaf Collimator

2015 ◽  
Vol 42 (6Part23) ◽  
pp. 3499-3499
Author(s):  
M Saiful Huq ◽  
Y Zhang ◽  
C Ozhasoglu ◽  
S Jang ◽  
D Heron ◽  
...  
Keyword(s):  
Multileaf Collimator ◽  
Small Field ◽  
Small Field Dosimetry ◽  
Output Factors

scholarly journals Monte Carlo study on electron contamination and output factors of small field dosimetry in 6 MV photon beam

Smart Science ◽  
2016 ◽  
Vol 4 (2) ◽  
pp. 87-94 ◽  
Author(s):  
Sitti Yani ◽  
I Gde Eka Dirgayussa ◽  
Mohamad Fahdillah Rhani ◽  
Roger C.X. Soh ◽  
Freddy Haryanto ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Study ◽  
Photon Beam ◽  
Small Field ◽  
Small Field Dosimetry ◽  
Output Factors

Effect of inaccurate small field output factors on brain SRS plans

2022 ◽  
Author(s):  
Brennen Dobberthien ◽  
Fred Cao ◽  
Yingli Zhao ◽  
Eric Harvey ◽  
Genoveva Badragan
Keyword(s):  
External Beam Radiotherapy ◽  
Target Volume ◽  
Small Field ◽  
Correction Factors ◽  
Energy Agency ◽  
Small Field Dosimetry ◽  
Small Fields ◽  
Output Factors ◽  
Flattening Filter ◽  
The Impact

Abstract External beam radiotherapy often includes the use of field sizes 3 × 3 cm2 or less, which can be defined as small fields. Dosimetry is a difficult, yet important part of the radiotherapy process. The dosimetry of small fields has additional challenges, which can lead to treatment inconsistencies if not done properly. Most important is the use of an appropriate detector, as well as the application of the necessary corrections. The International Atomic Energy Agency and the American Association of Physicists in Medicine provide the International Code of Practice (CoP) TRS-483 for the dosimetry of small static fields used in external MV photon beams. It gives guidelines on how to apply small-field correction factors for small field dosimetry. The purpose of this study was to evaluate the impact of inaccurate small-field output factors on clinical brain stereotactic radiosurgery plans with and without applying the small-field correction factors as suggested in the CoP. Small-field correction factors for a Varian TrueBeam linear accelerator were applied to uncorrected relative dose factors. Uncorrected and corrected clinical plans were created with two different beam configurations, 6 MV with a flattening filter (6 WFF) and 6 MV without a flattening filter (6 FFF). For the corrected plans, the planning target volume mean dose was 1.6 ± 0.9% lower with p < 0.001 for 6 WFF and 1.8 ± 1.5% lower with p < 0.001 for 6 FFF. For brainstem, a major organ at risk, the corrected plans had a dose that was 1.6 ± 0.9% lower with p = 0.03 for 6 WFF and 1.8 ± 1.5% lower with p = 0.10 for 6 FFF. This represents a systematic error that should and can be corrected.

Inter-institutional variability of small-field-dosimetry beams among HD120™ multileaf collimators: a multi-institutional analysis

2018 ◽  
Vol 63 (20) ◽  
pp. 205018 ◽  
Author(s):  
Yuichi Akino ◽  
Hirokazu Mizuno ◽  
Yoshihiro Tanaka ◽  
Masaru Isono ◽  
Norihisa Masai ◽  
...  
Keyword(s):  
Institutional Analysis ◽  
Small Field ◽  
Multileaf Collimators ◽  
Small Field Dosimetry

Reply to “Comments on theTRS‐483 Protocol on Small field Dosimetry” [Med. Phys. 45(12), 5666–5668 (2018)]

2018 ◽  
Vol 45 (12) ◽  
pp. 5669-5671 ◽  
Author(s):  
Hugo Palmans ◽  
Pedro Andreo ◽  
M. Saiful Huq ◽  
Jan Seuntjens ◽  
Karen E. Christaki ◽  
...  
Keyword(s):  
Small Field ◽  
Small Field Dosimetry

Commissioning a Miniature Multileaf Collimator (mMLC) for Small Field Treatments

2007 ◽  
Vol 19 (3) ◽  
pp. S48-S49 ◽  
Author(s):  
N.I. Twyman ◽  
D.J. Eaton ◽  
I.R. Cowley ◽  
G.S. Tudor ◽  
S.J. Thomas
Keyword(s):  
Multileaf Collimator ◽  
Small Field
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