| abstract |
In a method for producing a test element for diffusion tensor imaging, having a plurality of channels in a structure material, wherein the channels preferably have a maximum cross-section of 625 um 2 , wherein a virtual model of the test element is created and the virtual model is supplied to a structuring device, which produces the test element using a 3D-printing-based, in particular lithography-based, structuring method, according to the invention, the structuring method is designed as a multiphoton lithography, in particular multiphoton absorption method, in which the structure material containing a photosensitiser or photoinitiator is irradiated in selected sites, wherein the radiation is focused successively onto focus points within the structure material, whereby a respective volume element of the material located at the focus point undergoes a change in state by means of a photochemical reaction as a result of multiphoton absorption. |