Method and device for the combined representation of 2D fluoroscopic images and a static 3D image data set

A method for combining a representation of a 2D fluoroscopic image of a beating heart of a patient with a static 3D image data set of the beating heart, comprising:

• recording the static 3D image data set of the heart triggered by ECG at a first cardiac phase;
• acquiring the 2D fluoroscopic image of the beating heart;
• stimulatingly recording an ECG of the beating heart during the acquisition and assigning a cardiac phase to the 2D fluoroscopic image;
• calculating a 2D pseudo-projection of the 3D image data set on to an image plane of the fluoroscopic image;
• and
• representing the 2D fluoroscopic image on a screen overlaid with the 2D pseudo-projection,
• wherein the 2D pseudo-projection is represented differently on the screen depending on an interval of the cardiac phase of the 2D fluoroscopic image relative to the first cardiac phase.

A device for combining representations of a series of consecutively recorded 2D fluoroscopic images of a beating heart of a patient with a static 3D image data set of the beating heart, comprising:

• an x-ray device that acquires the series of 2D fluoroscopic images of the beating heart at even time intervals;
• an ECG device that records an ECG of the beating heart during the acquisition of the fluoroscopic images so that a cardiac phase is assigned to each fluoroscopic image;
• a data memory that stores the static 3D image data set of the beating heart that is ECG-triggered recorded at a first cardiac phase;
• a computing device that registers the 2D fluoroscopic images with the 3D image data set and calculates a plurality of 2D pseudo-projections of the 3D image data set for each 2D fluoroscopic images on to an image plane of each 2D fluoroscopic image;
• and
• a screen that consecutively represents the 2D fluoroscopic images each overlaid with an associated 2D pseudo-projection corresponding to a currently represented 2D fluoroscopic image, wherein the associated 2D pseudo-projection is represented differently on the screen depending on an interval of a cardiac phase of the currently represented fluoroscopic image relative to the first cardiac phase.