Moving object contour extraction apparatus, left ventricle image segmentation apparatus, moving object contour extraction method and left ventricle image segmentation method
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorsYanhua Wang, Chao Cong, Yanli Wang, Shaobin Wang
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Abstract
According to one embodiment, a moving object contour extraction apparatus includes a contour acquisition unit and a contour correction unit. The contour acquisition unit is configured to acquire a contour of a moving object in each image slice. The contour correction unit is configured to correct the contours of the moving object in image slices of at least one image slice time series based on motion trend information of the moving object in each of a plurality of image slice time series.
Claims11
A moving object contour extraction apparatus for extracting from a three-dimensional image time series contours of a moving object which performs a deforming motion, the three-dimensional image time series comprising a plurality of three-dimensional images acquired at a plurality of time points, each of the three-dimensional images consisting of a plurality of parallel two-dimensional image slices, and the two-dimensional image slices located at the same location in the plurality of three-dimensional images forming an image slice time series, the apparatus comprising:
- a contour acquisition unit configured to acquire a contour of the moving object in each image slice;
- and
- a contour correction unit configured to correct the contours of the moving object in the image slices of at least one image slice time series based on motion trend information of the moving object in each of a plurality of the image slice time series, the contour correction unit comprising:
- a motion trend determination unit configured to determine motion trend information of the moving object in each image slice time series;
- a similarity calculation unit configured to calculate a similarity between the motion trend information of the moving object in each image slice time series and reference motion trend information of the moving object;
- and
- a correction execution unit configured to correct the contours of the moving object in the image slices of a certain image slice time series if the similarity between the motion trend information of the moving object in the certain image slice time series and the reference motion trend information is lower than a predetermined threshold.
A moving object contour extraction method for extracting from a three-dimensional image time series contours of a moving object which performs a deforming motion, the three-dimensional image time series comprising a plurality of three-dimensional images acquired at a plurality of time points, each of the three-dimensional images consisting of a plurality of parallel two-dimensional image slices, and the two-dimensional image slices located at the same location in the plurality of three-dimensional images forming an image slice time series, the method comprising:
- acquiring a contour of the moving object in each image slice;
- and
- correcting the contours of the moving object in the image slices of at least one image slice time series based on motion trend information of the moving object in each of a plurality of the image slice time series,
- by determining motion trend information of the moving object in each image slice time series;
- by calculating a similarity between the motion trend information of the moving object in each image slice time series and reference motion trend information of the moving object;
- and
- by correcting the contours of the moving object in the image slices of a certain image slice time series if the similarity between the motion trend information of the moving object in the certain image slice time series and the reference motion trend information is lower than a predetermined threshold.
A moving object contour extraction apparatus for extracting from a three-dimensional image time series contours of a moving object which performs a deforming motion, the three-dimensional image time series comprising a plurality of three-dimensional images acquired at a plurality of time points, each of the three-dimensional images consisting of a plurality of parallel two-dimensional image slices, and the two-dimensional image slices located at the same location in the plurality of three-dimensional images forming an image slice time series, the apparatus comprising:
- circuitry configured to
- acquire a contour of the moving object in each image slice,
- correct the contours of the moving object in the image slices of at least one image slice time series based on motion trend information of the moving object in each of a plurality of the image slice time series,
- determine motion trend information of the moving object in each image slice time series,
- calculate a similarity between the motion trend information of the moving object in each image slice time series and reference motion trend information of the moving object, and
- correct the contours of the moving object in the image slices of a certain image slice time series if the similarity between the motion trend information of the moving object in the certain image slice time series and the reference motion trend information is lower than a predetermined threshold.
Dependencies are inferred from the claim text.