Motion compensated overlay
AssigneeSiemens Aktiengesellschaft
InventorsRui Liao, Yefeng Zheng, Matthias John, Alois Nöttling, Jan Boese
Life of this patent
Estimating the term…
Abstract
A method for displaying a motion compensated overlay includes receiving a model of a structure of interest, capturing an image depicting a region of interest and an instrument, determining whether the structure of interest is visible in the image, registering the model of the structure of interest to the image upon determining that the structure of interest is visible, and combining the model of the structure of interest with the image according to a registration to determine an overlay image.
Claims10
A method for generating a motion compensated overlay, comprising:
- receiving a 3D model of an aortic root shape;
- segmenting the received 3D model of the aortic root shape using intensity thresholding;
- determining gradients for the segmented 3D model;
- assigning a maximum gradient value to border pixels using the determined gradients;
- detecting edge pixels from the segmented 3D model using the determined gradients and the assigned maximum gradient values;
- producing a silhouette model of the aortic root shape by removing connected components having a small number of detected edge pixels from the segmented 3D model;
- capturing an image depicting an aortic root and an instrument;
- determining whether the aortic root shape is visible in the image;
- registering the produced silhouette to the captured image upon determining that the aortic root shape is visible in the captured image;
- and
- combining the produced silhouette with the captured image according to a registration to produce an overlay image.
A system for performing a method of displaying a motion compensated overlay, the system comprising:
- a processor configured to determine an overlay including a produced silhouette of a 3D model of an aortic root shape and an image, the processor executing instructions to perform a method comprising:
- receiving the 3D model of the aortic root shape;
- segmenting the received 3D model of the aortic root shape using intensity thresholding;
- determining gradients for the segmented 3D model;
- assigning a maximum gradient value to border pixels using the determined gradients;
- detecting edge pixels from the segmented 3D model using the determined gradients and the assigned maximum gradient values;
- producing a silhouette model of the aortic root shape by removing connected components having a small number of detected edge pixels from the segmented 3D model;
- capturing the image depicting an aortic root and an instrument;
- determining whether the aortic root shape is visible in the image;
- registering the produced silhouette to the captured image upon determining that the aortic root shape is visible in the captured image;
- and
- combining the produced silhouette with the captured image according to a registration to produce an overlay image;
- and
- a memory configured to store the overlay image.
Dependencies are inferred from the claim text.