Method for displaying an object

A method for determining image points while displaying biological tissue, said method comprising the steps of:

• a) generating a first image of at least one sub-region of the biological tissue with an intraoperative device;
• b) generating a second image of at least one sub-region of the biological tissue with an ultrasound device;
• c) ascertaining first coordinates of at least some of the image points of the second image in a first coordinate system;
• d) ascertaining second coordinates of at least some of the image points of the second image by projecting the first ascertained coordinates in a second coordinate system which is different from the first coordinate system and which is assigned to the intraoperative device;
• and
• e) generating a combined image of the biological tissue from the first and the second image using the ascertained second coordinates of the image points of the second image, wherein determining image points is achieved by using a sub-region of the biological tissue of interest which is marked successively using a marking process including:
• marking the biological tissue with a multitude of discrete light spots as supporting points with the intraoperative device that comprises a navigated light source, or
• marking a sub-region of the biological tissue of interest with a plurality of supporting points with a separate position determining device,
• so that generation of the combined image is achieved following the marking process by replacing or overlaying image points of the first image within the selected sub-region with image points of the second image.

A method for determining image points while displaying an object, in particular biological tissue, comprising the steps of:

• a) generating a first image of at least one sub-region of the object with a first imaging device;
• b) generating a second image of at least one sub-region of the object with a second imaging device;
• c) ascertaining first coordinates of at least some of the image points of the second image in a first coordinate system;
• d) ascertaining second coordinates of at least some of the image points of the second image by projecting the first ascertained coordinates in a second coordinate system which is different from the first coordinate system and which is assigned to the first imaging device;
• and
• e) generating a combined image of the object from the first and the second images using the ascertained second coordinates of the image points of the second image, wherein selection of the image points to be combined is achieved by selecting a sub-region of the object which is marked successively in a marking process including:
• using the first imaging device that comprises a laser to generate a multitude of distinct light spots on the object as supporting points, or
• using a separate navigated instrument to mark the object with a plurality of supporting points,
• so that generation of the combined image is achieved following the marking process by replacing or overlaying image points of the first image within the selected sub-region with image points of the second image.