Proton Beam Therapy Application Examples by Urs Rohrer
Proton Beam Optics, Graphic Transport Application, Graphic Turtle Application
A Medical Gantry for protons is a precise Proton Beam Therapy tool for Treating Cancer with ionizing particles.
The understanding of the optical design of such a gantry is an important prerequisite when building
a Proton Beam Therapy facility. The Graphic Transport Framework is a very handy computer tool for
optically designing such a gantry for Proton Beam Therapy. 'Beam line inversion' is the crucial way to solve the problem.
The four frames with Proton Beam Therapy Applications elaborated and presented here by Urs Rohrer (PSI) are:
For deep laying tumors the proton energy has to be as high as 250 MeV which may be produced by a superconducting
Cyclotron. For doing Proton Beam Therapy with such a cyclotron a degrader has to be used.
The Graphic Turtle framework is a well-suited program for studying - with the help of Monte-Carlo methods -
the effects degrader material has on the phase space of a fixed energy proton beam extracted from such a cyclotron.
After degradation of a 250 MeV Proton Beam to 70 MeV the Proton Beam Intensity is so low (1 % of the initial intensity) that you need a very
efficent application method when doing Proton Beam Therapy for Ocular Tumor Treatment with 1 Gy/s. This may better be accomplished
with the double scattering method. The howto of this method is demonstrated with the Graphic Turtle Framework.
Also the Isotope Production with a 70 MeV proton cyclotron may be considered as a Proton Beam Therapy method,
if the produced isotopes are used for tracing (e.g. PET) in medicine. Optimizing the production yield of isotopes may be important. The
Graphic Transport Framework is a well suited computer tool for a correct optical setup of the needed proton beam line.
- Example 1 of Proton Beam Therapy Application: Medical Gantry Design with Graphic Transport
- Example 2 of Proton Beam Therapy Application: Isotope Production Yield Optimization with Graphic Transport
- Example 3 of Proton Beam Therapy Application: Degrader Design for a 250 MeV Medical Cyclotron with Graphic Turtle
- Example 4 of Proton Beam Therapy Application: Double Scattering computations for Ocular Tumor Treatment Application with Graphic Turtle