Method for high-resolution presentation of filigree vessel implants in angiographic images
The invention relates to a method for high-resolution display of vessel implants in angiographic images, featuring the steps: recording at least two images of an object-catheter combination including catheter markers with a medical imaging method; detection of an region of interest created in the form of an area between the balloon markers which completely contains the object to be registered for each recorded image; coarse registration of the region of interest images by registration of the respective pairs of balloon markers of all recorded images; fine registration of the region of interest image content/of the region of interest image by registration of the region of interest content; and arithmetic averaging across the fine-registered images.
1. A method for creating a high-resolution image of an object in an angiographic image of a patient, comprising:
recording at least two images of the object and a catheter combination including catheter markers;
detecting a region of interest in an area between the markers completely containing the object in the at least two images;
marker-based coarsely registering the region of interest by registering the markers in the at least two images;
non-marker-based finely registering the region of interest by registering a content of the region of interest in the at least two images after the marker-based coarse registration to increase a surface of the object on a total surface of the region of interest for generating a fine-registered image; and
creating the high-resolution image of the object by arithmetically averaging across the fine-registered image,
wherein the fine registration is undertaken by a method selected from the group consisting of: sum of difference squares, variance of difference, leading-sign-change based measuring, coincident bit counting, and difference-histogram-based measuring.
2. The method as claimed in claim 1 , wherein the catheter is a balloon catheter.
3. The method as claimed in claim 1 , wherein the area between the markers is a rectangle.
4. The method as claimed in claim 1 , wherein the coarse registration is undertaken by moving, turning, or scaling connecting lines of the markers.
5. The method as claimed in claim 1 , wherein the at least two images are ECG-triggered recorded.
6. The method as claimed in claim 1 , wherein the at least two images are recorded by a magnetic resonance tomography device, an x-ray imaging device, or a projection radiography device.
7. The method as claimed in claim 1 , wherein the object comprises a vessel implant of the patient.
8. The method as claimed in claim 7 , wherein the vessel implant comprises a braided stent.
9. A device for creating a high-resolution image of an object in an angiographic image of a patient, comprising:
an image device that records at least two images of the object and a catheter combination including catheter markers; and
a computing device connected to the image device that:
detects a region of interest in an area between the markers completely containing the object in the at least two images;
marker-based coarsely registers the region of interest by registering the markers in the at least two images;
non-marker-based finely registers the region of interest by registering a content of the region of interest in the at least two images after the marker-based coarse registration to increase a surface of the object on a total surface of the region of interest for generating a fine-registered image; and
creates the high-resolution image of the object by arithmetically averaging across the fine-registered image,
wherein the fine registration is undertaken by a method selected from the group consisting of: sum of difference squares, variance of difference, leading-sign-change based measuring, coincident bit counting, and difference-histogram-based measuring.