TY  - JOUR
AB  - Objective:The purpose of the work presented here was to enable easy access to Monte Carlo dose calculation for both fast neutron therapy and boron neutron capture therapy for research purposes. The dose calculation approach was especially intended to hold high customization potential for individual user applications.Approach:The dose engine is based on the Monte Carlo code MCNP. It is integrated into the MATLAB-based open source research treatment planning software matRad as modular component.Main results:Total dose calculation is enabled for both fast neutron therapy and boron neutron capture therapy on patient CT data. The evaluation of the dose distribution is possible using the matRad graphical user interface and dose volume histograms. Customization options are provided for advanced users.Significance:The open source treatment planning software allows easy access to highly accurate Monte Carlo dose calculation for research projects.
AU  - Sommer, L.*
AU  - Chemnitz, T.*
AU  - Wahl, N.*
AU  - Bennan, A.B.A.*
AU  - Combs, S.E.
AU  - Wilkens, J.J.*
C1  - 75877
C2  - 58174
CY  - No.2 The Distillery, Glassfields, Avon Street, Bristol, England
TI  - A Monte Carlo dose engine for fast neutron therapy and boron neutron capture therapy for matRad.
JO  - Biomed. Phys. Eng. Express
VL  - 11
IS  - 6
PB  - Iop Publishing Ltd
PY  - 2025
SN  - 2057-1976
ER  - 

TY  - JOUR
AB  - The task of determining the geometry of a cone-beam CT scanner with flat panel detector and circular/spiral source trajectory is considered. Accomplishing this task implies analyzing projections of a set of points referred to as calibrating set or calibrating phantom. We take advantage of the fact that observed coordinates of a point's projection are rational functions of the point's location. Unknown coefficients of these functions can be recovered exactly from six projections of the point. Location of the source as well as position and orientation of the detector are determined in the scanner reference frame, which is constituted by rotation axis and central plane of the scanner. Two different projections of a calibrating set are enough to solve the task if the source trajectory is a circle. In applications where a shift of an object transversally to the central plane is required, two additional projections have to be collected in order to identify the direction of the shift. The developed formalism becomes especially simple when the detector is aligned with the rotation axis. In this case four projections of a single calibrating point rotated successfully about the rotation axis are sufficient. The error analysis carried out in the paper shows that the magnitude of deviation from the true values is of the order of the magnitude of measurement errors.
AU  - Tischenko, O.
AU  - Saeid Nezhad, N.*
AU  - Hoeschen, C.*
C1  - 56909
C2  - 47260
TI  - A method of determining geometry of cone beam CT scanner.
JO  - Biomed. Phys. Eng. Express
VL  - 5
IS  - 5
PY  - 2019
SN  - 2057-1976
ER  -