A Primary Proton Integral Depth Dose Calculation Model Corrected with Straight Scattering Track Approximation

2021 ◽  
Author(s):  
Junyu Zhang ◽  
Yongfei Liang ◽  
Chaowen Yang
Keyword(s):  
Dose Calculation ◽  
Calculation Model ◽  
Primary Proton ◽  
Depth Dose

A pencil beam dose calculation model for CyberKnife system

2016 ◽  
Vol 43 (10) ◽  
pp. 5380-5391 ◽  
Author(s):  
Bin Liang ◽  
Yongbao Li ◽  
Bo Liu ◽  
Fugen Zhou ◽  
Shouping Xu ◽  
...  
Keyword(s):  
Dose Calculation ◽  
Calculation Model ◽  
Pencil Beam ◽  
Beam Dose

Accuracy of the phase space evolution dose calculation model for clinical 25 MeV electron beams

2000 ◽  
Vol 45 (10) ◽  
pp. 2931-2945 ◽  
Author(s):  
Erik W Korevaar ◽  
Abdelhafid Akhiat ◽  
Ben J M Heijmen ◽  
Henk Huizenga
Keyword(s):  
Phase Space ◽  
Electron Beams ◽  
Dose Calculation ◽  
Calculation Model

scholarly journals On the prediction of X-ray dose deviations and the influence of CT scan protocols

2017 ◽  
Vol 23 (3) ◽  
pp. 47-54
Author(s):  
Freek CP Du Plessis
Keyword(s):  
Absorbed Dose ◽  
Dose Calculation ◽  
X Ray ◽  
Dose Prediction ◽  
Depth Dose ◽  
Calculated Dose ◽  
Number Variation ◽  
Treatment Plans ◽  
Clinically Significant ◽  
Dose Difference

Abstract Patients undergoing computerized tomography (CT) scans for tumor localization and treatment planning are frequently scanned using pre-set customized exposure protocols for optimal imaging of different anatomical sites. The question arises if these scanning protocols will produce a deviation in the Hounsfield number for a given tissue that can afterwards be used to predict the resulting dose calculation deviation due to this. The question is also if the deviation in the Hounsfield number of a tissue is large enough to affect dose calculation clinically significant. A study was devised in which a RMI phantom was scanned with five different scanning protocols and two CT beam energies at 120 and 135 kV. To assess the effect of insert configuration, Hounsfield number measurements were repeated for high density RMI inserts in the center and outer rings in the phantom. For each material insert the standard deviation of the Hounsfield number was calculated. To assist in dose prediction a series of DOSXYZnrc Monte Carlo calculations were carried out for beam qualities between 6 and 16 MV for a range of Hounsfield numbers calculated for bone and water. This provided information on how the depth dose varied as a function of Hounsfield number variation. Lastly, a series of treatment plans were setup for absorbed dose calculation using the RMI insert electron densities vs Hounsfield relations measured above. The absorbed dose of corresponding plans with the largest Hounsfield number variation were subtracted to find the dose discrepancies. It was found that the dose discrepancies in tissue types could be indicated by the deviation of the Hounsfield number due to different scanning protocols. The calculated dose difference were in all cases within 3%.

SU-FF-T-448: Validation of a New Photon Dose Calculation Model-Analytical Anisotropic Algorithm

2006 ◽  
Vol 33 (6Part14) ◽  
pp. 2148-2149 ◽  
Author(s):  
Y Rong ◽  
C Mubata ◽  
W Chisela ◽  
H Jaradat ◽  
D Tewatia ◽  
...  
Keyword(s):  
Dose Calculation ◽  
Calculation Model ◽  
Photon Dose ◽  
Analytical Anisotropic Algorithm

WE-E-BRB-05: A Novel Detector Dose Calculation Model for in Vivo Delivery Verification of IMRT Treatments

2012 ◽  
Vol 39 (6Part27) ◽  
pp. 3957-3957
Author(s):  
W Lu ◽  
M Chen ◽  
G Olivera ◽  
D Galmarini
Keyword(s):  
Dose Calculation ◽  
Calculation Model ◽  
Delivery Verification ◽  
In Vivo Delivery

scholarly journals Influence of 12-bit and 16-bit CT values of metals on dose calculation in radiotherapy using PRIMO, a Monte Carlo code for clinical linear accelerators

2019 ◽  
Vol 5 (1) ◽  
pp. 597-600
Author(s):  
Zehra Ese ◽  
Waldemar Zylka
Keyword(s):  
Water Environment ◽  
Dose Calculation ◽  
Hounsfield Unit ◽  
Ct Imaging ◽  
Monte Carlo Code ◽  
Dose Calculations ◽  
Linear Accelerators ◽  
Radiotherapy Treatment Planning ◽  
Depth Dose ◽  
Treatment Planning Systems

AbstractIn this paper, the effect of computed tomography (CT) values of metals in 12-bit and 16-bit extended Hounsfield Unit (EHU) scale on dose calculations in radiotherapy treatment planning systems (TPS) were quantified. Dose simulations for metals in water environment were performed with the software PRIMO in 6MV photon mode. The depth dose profiles were analysed and the relative dose differences between the metals determined with 12-bit and 16-bit CT imaging, respectively, were calculated. Maximum dose differences of ΔAl = 3.0%, ΔTi = 4.5%, ΔCr = 6.2% and ΔCu = 11.6% were measured. In order to increase the accuracy of dose calculation on patients with implants, CT imaging in the EHU scale is recommended.

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