Secondary neutron dose during proton therapy using spot scanning

2002 ◽  
Vol 53 (1) ◽  
pp. 244-251 ◽  
Author(s):  
Uwe Schneider ◽  
Stefano Agosteo ◽  
Eros Pedroni ◽  
Jürgen Besserer
Keyword(s):  
Proton Therapy ◽  
Neutron Dose ◽  
Secondary Neutron ◽  
Spot Scanning

scholarly journals Spot scanning proton therapy minimizes neutron dose in the setting of radiation therapy administered during pregnancy

2016 ◽  
Vol 17 (5) ◽  
pp. 366-376 ◽  
Author(s):  
Xin Wang ◽  
Falk Poenisch ◽  
Narayan Sahoo ◽  
Ronald X. Zhu ◽  
MingFwu Lii ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Proton Therapy ◽  
Neutron Dose ◽  
Spot Scanning

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.

Secondary neutron dose contribution from pencil beam scanning, scattered and spatially fractionated proton therapy

2021 ◽  
Author(s):  
Amelia Maia Leite ◽  
Maria Grazia Ronga ◽  
Maria Giorgi ◽  
Yoann Ristic ◽  
Yann Perrot ◽  
...  
Keyword(s):  
Proton Therapy ◽  
Neutron Dose ◽  
Pencil Beam ◽  
Beam Scanning ◽  
Secondary Neutron ◽  
Pencil Beam Scanning
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