Determining an Irradiation Plan for a Particle Irradiation Unit

摘要

A target volume within a test object is irradiated according to an irradiation plan with a particle beam using a particle irradiation unit. The irradiation plan is determined in order to apply the energy of the particle beam in the target volume according to a predetermined dose distribution. In addition, a boundary condition is specified for at least one of the isoenergy layers and the irradiation plan is additionally specified such that the boundary condition is met for the at least one isoenergy layer. The boundary condition includes one or more of a minimum boundary energy, a maximum boundary energy, a minimum grid point number, a minimum total particle number, a minimum total dose, a minimum dose contribution to a total dose to be administered, a minimum contribution to a target function which is calculated for determining the irradiation plan, and a minimum dose compensation error.

主权项

1. A method for determining an irradiation plan for a particle irradiation unit, wherein the particle irradiation unit is used to irradiate a target volume within an examination object with a particle beam depending on the irradiation plan, the method comprising:
prescribing the target volume and a predetermined dose distribution; and determining the irradiation plan in order to apply the particle beam in accordance with the predetermined dose distribution in the target volume, the target volume comprising a plurality of isoenergy layers, wherein a boundary condition is prescribed for at least one of the isoenergy layers, wherein the irradiation plan is determined such that the boundary condition for the at least one isoenergy layer is observed, and wherein the boundary condition comprises at least one of the following conditions: a minimum peak energy, a maximum peak energy, a minimum number of raster points, a minimum overall number of particles, a minimum overall dose, a minimum dose contribution to an overall dose to be applied, a minimum contribution to a target function calculated for determining the irradiation plan, and a minimum dose compensation error, wherein the dose compensation error specifies an error that occurs as a result of the non-irradiation of the respective isoenergy layer despite corresponding compensation by the irradiated isoenergy layers.