Method and system for image processing to determine patient-specific blood flow characteristics

A method of image analysis to produce a mammalian vascular state score, the method comprising:

• receiving vascular image data including:
• relative positions in one or more two-dimensional angiographic images of a plurality of vascular segments linked by branch points, and at least one lesion for which a respective lesion complexity includes a degree of stenosis;
• determining automatically a plurality of lesion complexity-related vascular metrics for each of a plurality of said vascular segments, based on at least one angiographic image of said received image data;
• determining said lesion complexity for use as an at least one subscore of a vascular state scoring tool, wherein the lesion complexity is based on said plurality of vascular metrics;
• and
• determining said vascular state score based on said at least one subscore.

A system for image analysis to automatically determine a vascular state score of lesion complexity, comprising:

• a subscore extractor functionally connectable to at least one two-dimensional angiographic vascular image data source, configured to:
• determine at least one vascular lesion complexity-related metric based on two-dimensional angiographic vascular image data received from said image data source, and determine at least one lesion complexity parameter based on said at least one metric;
• and
• a vascular state score determiner, configured to:
• receive a plurality of lesion complexity parameters from said subscore extractor, and compose said subscores into a vascular state score of lesion complexity.