Method of determining the blood flow through coronary arteries

A processor for determining the blood flow through coronary arteries, said processor being configured to

• generate a 3D image data set of at least the coronary arteries and the myocardial muscle,
• generate a 3D marker data set of at least the myocardial muscle from a dual-energy or spectral 3D data set generated by and obtained from one of a computed tomography, magnetic resonance, ultrasound or positron emission tomography imaging system after administration of a marker, said 3D marker data set indicating the amount of said marker contained within voxels of said myocardial muscle,
• subdivide in the 3D marker data set the myocardial muscle into myocardial muscle segments using a segmentation model,
• determine which coronary artery supplies the respective myocardial muscle segments by assuming that a coronary artery in a subdivided myocardial muscle segment supplies the myocardial muscle segment arranged in the same subdivided myocardial muscle segment,
• determine the volume of blood that flows into the respective myocardial muscle segments from said 3D marker data set, and
• determine the total volume of blood that flows into a coronary artery of interest by summing the volume of blood flowing into all myocardial muscle segments supplied by said coronary artery.