Siemens Aktiengesellschaft

Siemens Healthcare Gmbh

Robert Neuhauser

Eike Rietzel

Sven Oliver Grözinger

Thilo Elsässer

Oliver Thilmann

Johann Kim

Jörg Bohsung

Bernd Schweizer

Iwan Kawrakow

Sven Oliver GRÖZINGER

Thilo ELSÄSSER

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.

Determining an irradiation plan for a particle irradiation unit

An irradiation plan for a particle irradiation unit is determined in a first run based on a specified target volume in a test object and a specified dose distribution to apply the particle beam in the target volume. The target volume includes a plurality of isoenergy layers. The irradiation plan may be determined in a second run with an additional condition that at least one of the isoenergy layers, determined according to one or more criteria, is not irradiated. Alternatively, the irradiation plan may be determined in a second run with an additional condition that only certain isoenergy layers, determined according to one or more criteria, are irradiated.

Method and device for determining an irradiation plan for a particle irradiation unit

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Neufahrn, Germany

Robert Neuhauser