Patent ID: 9202274
Filing Date: 2015-12-01
Classification: A61B,G06T,G16H

Abstract:
1. An image processing method for calculating blood vessel direction of a flow velocity image comprising a plurality of point-regions, each point-region associated with a central point, the method comprising: distinguishing each of the point-regions in the flow velocity image as point-regions in a flow region and point-regions in a background region; estimating a rough direction of a computing point-region by: setting a plurality of directions which pass through the computing point-region and respectively calculating the number of point regions in the flow region connecting with the computing point-region in each of the plurality of direction; and taking the direction with the maximum number of point-regions as the rough direction of the computing point-region; determining middle point-regions on the direction perpendicular to the rough direction in a neighborhood; determining a line connecting the central points of the middle point-regions as a median line of the blood vessel in the neighborhood, wherein the neighborhood is centered on the computing point-region and includes a plurality of point-regions in the flow region in the rough direction; and calculating the direction of the blood vessel on the computing point-region according to the determined median line of the blood vessel.