Methods and systems for color flow dynamic frame persistence
AssigneeShenzhen Mindray Bio-Medical Electronics Co., Ltd.
InventorsYaoxian Zou, Bin Yao, Qinjun Hu
Life of this patent
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Abstract
Methods and systems for color flow dynamic frame persistence in ultrasonic imaging are provided.
Claims8
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 and respectively calculating the number of point-regions in the flow region connecting with the computing point-region in each 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,
- wherein calculating comprises applying a linear fitting or Hough Transform to the determined median line of the blood vessel.
A system 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 system comprising:
- a processor;
- a distinguishing module configured to distinguish each of the point-regions in the blood flow velocity image as point-regions in a flow region and point-regions in a background region;
- an estimation module configured to set a plurality of directions and respectively calculate the number of the point-regions in the flow region connecting with a computing point-region each direction, and take the direction with the maximum number as the rough direction of the computing point-region;
- a determination module configured to determine 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 takes the computing point-region as a center point-regions and comprises a plurality of point-regions in the flow region in the rough direction;
- and
- a computation module configured to calculate the direction of the blood vessel on the computing point-region according to the determined median line of the blood vessel,
- wherein the computation module is configured to applying a linear fitting or Hough Transform to the determined median line of the blood vessel.
A non-transitory computer-readable medium comprising program code that causes a processor to perform operations 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 operations 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 and respectively calculating the number of point-regions in the flow region connecting with the computing point-region in each 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 around 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,
- wherein calculating comprises applying a linear fitting or Hough Transform to the determined median line of the blood vessel.
Dependencies are inferred from the claim text.