A method for image support in a navigation of a medical instrument, in particular a catheter, in at least one hollow organ in a surgical site of a body is proposed. A presentation of a current position of the instrument in the hollow organ is generated from a three-dimensional dataset of the surgical site and the presentation data describes the current position of the instrument. At least one geometry parameter influencing the generation and/or display of the presentation is automatically adjusted taking into account position data of the instrument describing the current three-dimensional position and the current three-dimensional orientation of a tip of the instrument. The presentation corresponding to the geometry parameters is displayed.
