The dextroscope is a tool for planning of complex neurosurgical operations in virtual reality. Data from two dimensional CT- or MRI-scans can be fused to a 3D-model, which shows the individual pathoanatomy very precisely and accurately. Steps of the operation can be simulated and trained using this model. With the help of the dextroscope-planning platform the surgical strategy for minimal invasive procedures can be optimized and tailored to the individuals anatomy in order to minimize neurological damage. Until now we have planned and performed more than 400 operations using virtual planning and training with the dextroscope-system.