Identifying individual sub-regions of the cardiovascular system for calcium scoring

A method, comprising:

• identifying a plurality of different anatomical sub-regions of a cardiovascular system of a subject in image data of the subject based on a subject specific cardiovascular anatomical model, wherein the plurality of different anatomical sub-regions corresponds to regions where calcifications occur;
• searching for calcifications in the sub-regions based on voxel grey value intensity values of the image data,
• identifying calcifications in a sub-region using a pre-determined threshold, wherein a first threshold is used for a first sub-region of the plurality of different anatomical sub-regions, a second threshold is used for a second sub-region of the plurality of different anatomical sub-regions, and the first and second thresholds are different;
• generating a signal indicative of one or more regions of voxels of the image data respectively corresponding to sub-regions including identified calcifications;
• determining calcium scores for at least one of the sub-regions
• determining relative severities for the calcium scores;
• assigning a different color to the different severities;
• generating a mapping between the relative severities and a surface of the subject specific cardiovascular anatomical model;
• and
• visually presenting the subject specific cardiovascular anatomical model, using the different colors assigned to the severities to identify the relative severities in corresponding sub-regions.