Methods for automatic segmentation and temporal tracking
First Claim
1. A method of detecting and tracking a centerline of a vessel in real-time, the method comprising:
- acquiring a 3D image volume;
initializing the centerline;
initializing a Kalman filter;
predicting a next center point using the Kalman filter;
checking validity of the prediction;
updating the centerline based on the predicted next center point;
performing template matching for estimating measurement error;
updating the Kalman filter based on the template matching; and
repeating the steps of predicting, checking, updating performing and updating for a predetermined number of times.
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Abstract
In one embodiment, a method of detecting centerline of a vessel is provided. The method comprises steps of acquiring a 3D image volume, initializing a centerline, initializing a Kalman filter, predicting a next center point using the Kalman filter, checking validity of the prediction made using the Kalman filter, performing template matching, updating the Kalman filter based on the template matching and repeating the steps of predicting, checking, performing and updating for a predetermined number of times. Methods of automatic vessel segmentation and temporal tracking of the segmented vessel is further described with reference to the method of detecting centerline.
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Citations
15 Claims
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1. A method of detecting and tracking a centerline of a vessel in real-time, the method comprising:
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acquiring a 3D image volume; initializing the centerline; initializing a Kalman filter; predicting a next center point using the Kalman filter; checking validity of the prediction; updating the centerline based on the predicted next center point; performing template matching for estimating measurement error; updating the Kalman filter based on the template matching; and repeating the steps of predicting, checking, updating performing and updating for a predetermined number of times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of segmenting and tracking a centerline of a vessel comprising a plurality of cross sections in real-time, the method comprising:
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acquiring a 3D image volume; initializing one or more Kalman filter parameters using a preset configuration file; selecting an initial center point within the vessel to be segmented; performing an initial segmentation on a first image slice based on the initial center point, the first image slice being a 2D cross-section of the vessel; creating a template of a vessel cross section based on the initial segmentation; predicting a next center point that is a translation of the initial point along a beam direction using the Kalman filter; correcting the next center point based on a measurement of the next center point in the image volume; updating a centerline of the 3D image volume based on the next center point; segmenting a second image slice based on the next center point; and repeating the steps of predicting, correcting and segmenting until the vessel has been completely segmented in the 3D image volume. - View Dependent Claims (15)
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Specification