Implementation of an analytical solution to lateral dose prediction in a proton therapy treatment planning system

This work aims to present a flexible
computational model for the calculation of the lateral
deflection of a pencil proton beam, and the
preliminary results of its implementation in a
Treatment Planning System (TPS) instead of the
currently used Double Gaussian approximation (DGA) in
water.
First evidences show that the model has better accuracy
with fast computation time in water; it is reliable for any
depth and for every kind of media and mixture, since
energy loss effects by the primary process are fully taken
into account.