scholarly journals Analysis Of Small Field Dosimetry For 6 MV Photon Beams

2015 ◽  
Keyword(s):  
Small Field ◽  
Photon Beams ◽  
Small Field Dosimetry

scholarly journals A novel high-resolution 2D silicon array detector for small field dosimetry with FFF photon beams

2018 ◽  
Vol 45 ◽  
pp. 117-126 ◽  
Author(s):  
G. Biasi ◽  
M. Petasecca ◽  
S. Guatelli ◽  
N. Hardcastle ◽  
M. Carolan ◽  
...  
Keyword(s):  
High Resolution ◽  
Array Detector ◽  
Small Field ◽  
Photon Beams ◽  
Small Field Dosimetry

scholarly journals PO-0840: Small field dosimetry for flattening filter free photon beams

2015 ◽  
Vol 115 ◽  
pp. S425-S426
Author(s):  
D. Mateus ◽  
G. Beyer ◽  
S. Vieira ◽  
C. Greco
Keyword(s):  
Small Field ◽  
Photon Beams ◽  
Small Field Dosimetry ◽  
Flattening Filter Free ◽  
Flattening Filter

scholarly journals Estimation of Dosimetric Parameters based on KNR and KNCSF Correction Factors for Small Field Radiation Therapy at 6 and 18 MV Linac Energies using Monte Carlo Simulation Methods

2019 ◽  
Vol 9 (1Feb) ◽  
Author(s):  
S A Rahimi ◽  
B Hashemi ◽  
S R Mahdavi
Keyword(s):  
Monte Carlo ◽  
Correction Factor ◽  
Reference Conditions ◽  
Field Size ◽  
Monte Carlo Code ◽  
Small Field ◽  
Correction Factors ◽  
Photon Beams ◽  
Small Field Dosimetry ◽  
Circular Field

Background: Estimating dosimetric parameters for small fields under non-reference conditions leads to significant errors if done based on conventional protocols used for large fields in reference conditions. Hence, further correction factors have been introduced to take into account the influence of spectral quality changes when various detectors are used in non-reference conditions at different depths and field sizes.Objective: Determining correction factors (KNR and KNCSF) recommended recently for small field dosimetry formalism by American Association of Physicists in Medicine (AAPM) for different detectors at 6 and 18 MV photon beams.Methods: EGSnrc Monte Carlo code was used to calculate the doses measured with different detectors located in a slab phantom and the recommended KNR and KNCSF correction factors for various circular small field sizes ranging from 5-30 mm diameters. KNR and KNCSF correction factors were determined for different active detectors (a pinpoint chamber, EDP-20 and EDP-10 diodes) in a homogeneous phantom irradiated to 6 and 18 MV photon beams of a Varian linac (2100C/D).Results: KNR correction factor estimated for the highest small circular field size of 30 mm diameter for the pinpoint chamber, EDP-20 and EDP-10 diodes were 0.993, 1.020 and 1.054; and 0.992, 1.054 and 1.005 for the 6 and 18 MV beams, respectively. The KNCSF correction factor estimated for the lowest circular field size of 5 mm for the pinpoint chamber, EDP-20 and EDP-10 diodes were 0.994, 1.023, and 1.040; and 1.000, 1.014, and 1.022 for the 6 and 18 MV photon beams, respectively.Conclusion: Comparing the results obtained for the detectors used in this study reveals that the unshielded diodes (EDP-20 and EDP-10) can confidently be recommended for small field dosimetry as their correction factors (KNR and KNCSF) was close to 1.0 for all small field sizes investigated and are mainly independent from the electron beam spot size.

scholarly journals Analysis of Small Field Dosimetry for 15 MV Photon Beams

2015 ◽  
Vol 2 (2) ◽  
pp. 17-23 ◽  
Author(s):  
Yonca Yahşi ◽  
◽  
Meral Kurt ◽  
Lütfi Özkan ◽  
◽  
...  
Keyword(s):  
Small Field ◽  
Photon Beams ◽  
Small Field Dosimetry

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
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