Method for computing a color-coded analysis image

A non-transitory computer program stored on a data medium and executable by a computer for computing an analysis image of an examination area of an examination object from a temporal sequence of fluoroscopic images of the examination area, wherein the examination area comprises a vascular system including arteries and/or veins as blood vessels, and wherein the analysis image spatially corresponds to the fluoroscopic images pixel-by-pixel, comprising:

• a machine code for:
• assigning an acquisition time instant to each of the fluoroscopic images representing a given distribution of a material embolizing at least some of the vascular system in the examination area at the acquisition time instant;
• receiving the temporal sequence of fluoroscopic images;
• assigning a color attribute to a pixel of the analysis image at the acquisition time instant with a rule of:
• assigning a color to the pixel at the analysis image if the pixel at the acquisition time instant first time becomes darker than the pixel at a preceding acquisition time instant indicating the pixel is stained,
• changing the color of the pixel at the analysis image if the pixel at the acquisition time instant remains dark from the preceding acquisition time instant based on how many time intervals ago the pixel first time becomes darker, and
• assigning a background color to the pixel at the analysis image if the pixel at the acquisition time instant corresponds to a background color of the analysis image;
• computing the analysis image repeatedly after re-initializing the temporal sequence of the fluoroscopic images by the computer with a further rule of:
• changing color of pixels that are stained until the re-initialization to a different color,
• assigning a color attribute to other pixels with the rule prior to the re-initialization;
• and
• outputting the analysis image to a user.

A computer for computing an analysis image of an examination area of an examination object from a temporal sequence of fluoroscopic images of the examination area, wherein the examination area comprises a vascular system including arteries and/or veins as blood vessels, and wherein the analysis image spatially corresponds to the fluoroscopic images pixel-by-pixel, comprising:

• a storage device that stores a computer program for:
• assigning an acquisition time instant to each of the fluoroscopic images representing a given distribution of a material embolizing at least some of the vascular system in the examination area at the acquisition time instant;
• receiving the temporal sequence of fluoroscopic images;
• assigning a color attribute to a pixel of the analysis image at the acquisition time instant with a rule of:
• assigning a color to the pixel at the analysis image if the pixel at the acquisition time instant first time becomes darker than the pixel at a preceding acquisition time instant indicating the pixel is stained,
• changing the color of the pixel at the analysis image if the pixel at the acquisition time instant remains dark from the preceding acquisition time instant based on how many time intervals ago the pixel first time becomes darker, and
• assigning a background color to the pixel at the analysis image if the pixel at the acquisition time instant corresponds to a background color of the analysis image;
• computing the analysis image repeatedly after re-initializing the temporal sequence of the fluoroscopic images by the computer with a further rule of:
• changing color of pixels that are stained until the re-initialization to a different color,
• assigning a color attribute to other pixels with the rule prior to the re-initialization;
• and
• outputting the analysis image to a user.