System for performing transcutaneous photodynamic therapy (PDT) in an organ or organ segment of an organic body

A system for performing transcutaneous photodynamic therapy (PDT) in an organ or organ segment of an organic body,

• wherein the system comprises
• a plurality of individually manually placeable light applicators, wherein the light applicators each comprise a needle-shaped insertion portion for transcutaneous piercing along a piercing axis into the organ or organ segment, a light-emitting applicator tip at a distal end of the insertion portion, and at least one defined fixing point at a proximal distance from the applicator tip;
• a supply unit for supplying the light applicators with light and/or power;
• and
• a placement template placeable in a defined position relative to the organic body for defined orientation, placement, and fixing of the individual light applicators, the placement template defining a plurality of fixing point receptacles by means of which the light applicators are fixable with the respective at least one defined fixing point, wherein the fixing point receptacles are arranged in accordance with a three-dimensional fixing point grid structure, wherein the three-dimensional fixing point grid structure corresponds to a virtual organ-specific target point grid structure for the light-emitting applicator tips in the organ or organ segment and is arranged parallel-displaced relative to the target point grid structure by the proximal distance along the piercing axis, wherein the placement template defines a plurality of fixing point receptacles spatially distributed on fixing point receptacle grid areas, wherein the fixing point receptacle grid areas have a distance from each other along the piercing axis.