The Ventricle Guide Training App shows how important thorough planning is when inserting a ventricular catheter and how the individual anatomy of the patient should be taken into account. Based on a CT or MRI image, the correct placement of a ventricular catheter can be trained. The app shows the sagittal entry angle, catheter depth, and distance to the midline of the skull step by step. The app provides training images, or you can use your own images. Completed training sessions can be saved in an archive.