Method, device and system for dynamic analysis from sequences of volumetric images
Assignee3mensio Medical Imaging B.V.
InventorsJan Anne Niels de Vaan, Peter Heil, Arjen Witteveen, Martijn L. Laurentius Chatrou
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Abstract
Devices, systems, computer program products and computer implemented methods are provided for dynamically assessing a moving object from a sequence of consecutive volumetric image frames of such object, which images are timely separated by a certain time interval, by: identifying in at least one image of the sequence the object of interest; segmenting the object to identify object contour; propagating the object contour as identified to other images of the sequence; and performing dynamic analysis of the object based on the object contour as propagated.
Claims20
A method for dynamically assessing a moving object from a sequence of consecutive volumetric image frames of such object, which image frames are separated in time by a certain time interval, the method comprising:
- a) identifying the object in at least one image frame of the sequence;
- b) segmenting the object to identify an object contour;
- c) propagating the object contour of b) to other image frames of the sequence;
- and
- d) performing dynamic analysis of the object based on the propagation of the object contour of c);
- wherein the object comprises a heart valve that regulates blood flow through a ventricle, and the object contour comprises an annulus of the heart valve;
- and
- wherein the segmenting the object comprises
- i) receiving from a user a seed point indicating a center of the heart valve;
- ii) automatically determining a long axis of the ventricle by using the seed point of i) to estimate location of an apex point of the ventricle and a center-lumen line within the ventricle.
A method for dynamically assessing a heart valve that regulates blood flow through a ventricle of the heart from a sequence of consecutive volumetric image frames of the heart valve, which image frames are separated in time by a certain time interval, the method comprising:
- a) identifying the heart valve in at least one image frame of the sequence;
- b) receiving from a user a seed point indicating a center of the heart valve;
- c) determining a long axis of the ventricle by using the seed point of b) to estimate a location of an apex point of the ventricle and a center-lumen line within the ventricle;
- d) determining a cost image representing probability a voxel belongs to a contour of the heart valve;
- e) finding a minimal cost path to identify the contour of the heart valve within the cost image;
- f) transforming points of the minimal cost path to three-dimensional (3D) patient coordinates to obtain the contour of the heart valve in 3D coordinates;
- g) propagating the contour of the heart valve to other image frames of the sequence;
- and
- h) performing dynamic analysis of the heart valve based on the propagation of the contour of the heart valve of g).
Dependencies are inferred from the claim text.