On The Relationship Between The Energy, Energy Spread And Distal Slope for Proton Therapy Observed in GEANT4

TL;DR

This paper presents a Geant4 simulation model that establishes a polynomial relationship between energy, energy spread, and distal slope in proton therapy, aiding real-time beam monitoring.

Contribution

It introduces a novel 2D polynomial model linking key proton therapy parameters for improved dose accuracy and beam monitoring.

Findings

Developed a Geant4-based model for proton therapy parameters.

Derived a polynomial relationship for energy, spread, and distal slope.

Potential for real-time, non-invasive beam quality assessment.

Abstract

In proton therapy both the energy, which determines the range, and the distal slope, which reflects the rate at which the protons decelerate, are of import if we are to ensure accurate dose deposition and maximum tissue sparing. This publication describes a Geant4 model and presents a two-dimensional polynomial relationship between energy, the energy spread and the distal slope for beams with Gaussian energy spectra for proton therapy. This simple polynomial relationship will be useful for non-invasive or minimally invasive near real-time monitoring of the energy and energy spread of a proton therapy beam.