Technical Note: Preferred dosimeter size and associated correction factors in commissioning high dose per pulse, flattening filter free x-ray beams

2016 ◽  
Vol 43 (3) ◽  
pp. 1507-1513 ◽  
Author(s):  
A. Sudhyadhom ◽  
N. Kirby ◽  
B. Faddegon ◽  
C. F. Chuang
Keyword(s):  
Technical Note ◽  
High Dose ◽  
Correction Factors ◽  
X Ray ◽  
Flattening Filter Free ◽  
Flattening Filter

scholarly journals Feasibility of output quality assurance considering gantry angle using “Stealth Chamber”

2021 ◽  
Vol 27 (4) ◽  
pp. 299-302
Author(s):  
Hideharu Miura ◽  
Fumika Takeichi ◽  
Tsubasa Enosaki ◽  
Kiyoshi Yamada ◽  
Shuichi Ozawa ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Correction Factor ◽  
Field Size ◽  
Correction Factors ◽  
X Ray ◽  
Dose Rates ◽  
Flattening Filter Free ◽  
Output Quality ◽  
Flattening Filter ◽  
Gantry Angle

Abstract Purpose: This study was conducted to demonstrate the feasibility of X-ray output constancy quality assurance (QA) of a linear accelerator for various gantry angles using the Stealth Chamber. Methods: The X-ray output constancy of a Varian TrueBeam STx was evaluated under various gantry angles and a 10 × 10 cm2 field size using a Stealth Chamber. Specifically, 10X and 10X-flattening-filter-free beams with dose rates of 600 and 2400 monitor units (MU)/min, respectively, were used. The Stealth Chamber was attached to the gantry head, and irradiation was performed every 45° for gantry angles of 0-315°. To evaluate the variations in the output constancy with respect to the gantry angle, the acquired values were normalized to the value corresponding to a 0° gantry angle. The obtained results were utilized to determine the correction factors for all gantry angles. To verify the correction factors, additional measurements were performed for five days. Results: The maximum variation in the output constancy measurement relative to the output constancy at a 0° gantry angle was found to be approximately 4.0% for both energy beams at a gantry angle of 180°. Furthermore, the measured values were dependent on the gantry angle. Upon applying the correction factor, the variation in the output constancy with respect to the gantry angle was less than 0.5%. Conclusions: Output constancy QA using the Stealth Chamber for various gantry angles was found to be feasible with the application of a correction factor.

Interplay effect on a 6-MV flattening-filter-free linear accelerator with high dose rate and fast multi-leaf collimator motion treating breast and lung phantoms

2018 ◽  
Vol 45 (6) ◽  
pp. 2369-2376 ◽  
Author(s):  
Tucker Netherton ◽  
Yuting Li ◽  
Paige Nitsch ◽  
Simona Shaitelman ◽  
Peter Balter ◽  
...  
Keyword(s):  
Dose Rate ◽  
Linear Accelerator ◽  
High Dose Rate ◽  
High Dose ◽  
Flattening Filter Free ◽  
Multi Leaf Collimator ◽  
Flattening Filter ◽  
Interplay Effect

SU-E-T-555: Small Field Dosimetry of the Flattening Filter Free (FFF) X-Ray Photons

2011 ◽  
Vol 38 (6Part19) ◽  
pp. 3617-3617
Author(s):  
Y Wang ◽  
S Easterling ◽  
J Ting
Keyword(s):  
Small Field ◽  
X Ray ◽  
Small Field Dosimetry ◽  
Flattening Filter Free ◽  
Flattening Filter

Effect of high dose per pulse flattening filter-free beams on cancer cell survival

2011 ◽  
Vol 101 (1) ◽  
pp. 226-232 ◽  
Author(s):  
Ines Lohse ◽  
Stephanie Lang ◽  
Jan Hrbacek ◽  
Stephan Scheidegger ◽  
Stephan Bodis ◽  
...  
Keyword(s):  
Cell Survival ◽  
Cancer Cell ◽  
High Dose ◽  
Flattening Filter Free ◽  
Cancer Cell Survival ◽  
Flattening Filter

SU-GG-T-130: Rotational IMRT Delivery Using a Siemens Artiste in Flattening-Filter-Free, High Dose-Rate Mode

2010 ◽  
Vol 37 (6Part17) ◽  
pp. 3214-3214
Author(s):  
V Sarkar ◽  
P Rassiah-Szegedi ◽  
M Szegedi ◽  
B Wang ◽  
H Zhao ◽  
...  
Keyword(s):  
Dose Rate ◽  
High Dose Rate ◽  
High Dose ◽  
Flattening Filter Free ◽  
Flattening Filter

MO-D-BRB-05: Skin Dose Study of the Flattening Filter Free (FFF) X-Ray Photons

2011 ◽  
Vol 38 (6Part25) ◽  
pp. 3710-3710
Author(s):  
Y Wang ◽  
S Easterling ◽  
J Ting
Keyword(s):  
Skin Dose ◽  
X Ray ◽  
Flattening Filter Free ◽  
Dose Study ◽  
Flattening Filter
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