Abstract: A navigation support system for medical instruments comprises a signal processing unit with an input for real-time video image signals from an optical instrument, input for instrument position signals and access to tomography image data, and output for outputting image signals. The signal processing unit generates output image signals from the image signals, the image data and the position signals and generates the output image signals such that the real-time video image signals are displayed permanently centrally on an image display unit connected to the navigation support system in a round or oval central image display of an overall image, wherein the central image display extends at least in one direction of extension across more than half of the overall image and that the secondary images generated by tomography image data, in dependence on the instrument position signals, are displayed adjacent to or partially superimposed over the central image display.

Abstract: The invention relates to a mobile field coil unit for a medical system for detecting the position of a patient, medical equipment and/or prostheses in an operating area, wherein the field coil unit is designed to emit or receive an alternating electromagnetic field. The field coil unit can be arranged movably on the patient or in an area next to the patient for operation as intended, wherein the field coil unit has an outer contour on at least one placement side, which outer contour is designed to surround an object or a part of a patient laterally in order to prevent lateral sliding between the field coil unit and the object or part of the patient. Preferably, the field coil unit is a field generator.