Influence of beam efficiency through the patient-specific collimator on secondary neutron dose equivalent in double scattering and uniform scanning modes of proton therapy

2010 ◽  
Vol 37 (6Part1) ◽  
pp. 2910-2917 ◽  
Author(s):  
D. Hecksel ◽  
V. Anferov ◽  
M. Fitzek ◽  
K. Shahnazi
Keyword(s):  
Proton Therapy ◽  
Neutron Dose ◽  
Patient Specific ◽  
Double Scattering ◽  
Dose Equivalent ◽  
Secondary Neutron ◽  
Neutron Dose Equivalent ◽  
Uniform Scanning

Measurements of neutron dose equivalent for a proton therapy center using uniform scanning proton beams

2012 ◽  
Vol 39 (6Part1) ◽  
pp. 3484-3492 ◽  
Author(s):  
Yuanshui Zheng ◽  
Yaxi Liu ◽  
Omar Zeidan ◽  
Andries Niek Schreuder ◽  
Sameer Keole
Keyword(s):  
Proton Therapy ◽  
Neutron Dose ◽  
Dose Equivalent ◽  
Proton Beams ◽  
Neutron Dose Equivalent ◽  
Uniform Scanning ◽  
Therapy Center

ASSESSMENT OF AMBIENT NEUTRON DOSE EQUIVALENT IN SPATIALLY FRACTIONATED RADIOTHERAPY WITH PROTONS USING PHYSICAL COLLIMATORS

2020 ◽  
Vol 189 (2) ◽  
pp. 190-197 ◽  
Author(s):  
Serdar Charyyev ◽  
C-K Chris Wang
Keyword(s):  
Monte Carlo ◽  
Neutron Dose ◽  
Monte Carlo Code ◽  
Dose Equivalent ◽  
Secondary Neutron ◽  
Fractionated Radiotherapy ◽  
Spot Scanning ◽  
Neutron Dose Equivalent ◽  
Secondary Neutrons ◽  
Proton Dose

Abstract New technique is trending in spatially fractionated radiotherapy with protons to utilize the spot scanning together with a physical collimator to obtain minibeams. The primary goal of this study is to quantify ambient neutron dose equivalent (${H}^{\ast }(10)$) due to the secondary neutrons when physical collimator is used to achieve desired minibeams. The ${H}^{\ast }(10)$ per treatment proton dose (D) was assessed using Monte Carlo code TOPAS and measured using WENDI-II detector at different angles (135, 180, 225 and 270 degrees) and distances (11 cm, 58 and 105 cm) from the phantom for two cases: with and without physical collimation. Without collimation $\frac{H^{\ast }(10)}{D}$ varied from 0.0013 to 0.242 mSv/Gy. With collimation $\frac{H^{\ast }(10)}{D}$ varied from 0.017 to 3.23 mSv/Gy. Results show that the secondary neutron dose will increase tenfold when the physical collimator is used. Regardless, it will be low and comparable to the neutron dose produced by conventional passive-scattered proton beams.

SU-GG-T-381: Monte Carlo Study of Neutron Dose Equivalent for a Compact Proton Therapy Unit

2010 ◽  
Vol 37 (6Part21) ◽  
pp. 3273-3273 ◽  
Author(s):  
Y Zheng ◽  
E Klein ◽  
K Chen ◽  
Y Liu
Keyword(s):  
Monte Carlo ◽  
Proton Therapy ◽  
Monte Carlo Study ◽  
Neutron Dose ◽  
Dose Equivalent ◽  
Neutron Dose Equivalent

MO-F-BRA-02: Measurements of Neutron Dose Equivalent for Uniform Scanning Proton Beams

2011 ◽  
Vol 38 (6Part26) ◽  
pp. 3720-3721
Author(s):  
Y Zheng ◽  
Y Liu ◽  
O Zeidan ◽  
A Schreuder ◽  
S Keole
Keyword(s):  
Neutron Dose ◽  
Dose Equivalent ◽  
Proton Beams ◽  
Neutron Dose Equivalent ◽  
Uniform Scanning

SU-E-T-495: Influence of Reduced Target-To-Nozzle Distance On Secondary Neutron Dose Equivalent in Proton and Carbon Ion Radiotherapy

2015 ◽  
Vol 42 (6Part20) ◽  
pp. 3448-3448
Author(s):  
Y Sheng ◽  
K Shahnazi ◽  
W Wang ◽  
M Moyers ◽  
Y Deng ◽  
...  
Keyword(s):  
Neutron Dose ◽  
Carbon Ion Radiotherapy ◽  
Dose Equivalent ◽  
Secondary Neutron ◽  
Carbon Ion ◽  
Neutron Dose Equivalent

TU-D-224C-01: Effects of Choice of the MLC Material On Neutron Dose Equivalent Outside of the Treatment Field in Proton Therapy

2006 ◽  
Vol 33 (6Part17) ◽  
pp. 2198-2198
Author(s):  
D Goulart ◽  
R Maughan ◽  
J McDonough ◽  
S Avery
Keyword(s):  
Proton Therapy ◽  
Neutron Dose ◽  
Dose Equivalent ◽  
Neutron Dose Equivalent
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