Abstract: Systems and methods provide guidance for selection of projection perspectives to utilize to obtain complementary combinations of projection images of an object. The systems and methods provide a bi-dimensional first image of the object which has been obtained from a first perspective. A map of values associated with different candidate perspectives relative to the first perspective is determined, wherein the value associated with a given candidate perspective is determined from at least one parameter indicative of a degree to which the given candidate perspective complements the first perspective and at least one weighting parameter. The map can be displayed or evaluated to select at least one candidate perspective to utilize to acquire or obtain a combination of complementary projection images.

Abstract: A method is provided for flow analysis in a target volume of a moving organ, which involves a sequence of first volumetric image data sets that include structural information and three-directional velocity information of the target volume and a sequence of second volumetric image data sets that include structural information of the target volume. The method involves tracking a feature of interest within the sequence of the second volumetric data sets, determining time varying spatial orientation of a plane containing the feature of interest in the sequence of the first volumetric image data sets by transferring the plane from the second volumetric image data sets to the first volumetric image data sets, reformatting the three-directional velocity information into one-directional velocity information on the plane, and performing bi-dimensional quantitative flow analysis using the one-directional velocity information. A corresponding apparatus and computer program are also disclosed and claimed.

Abstract: Systems and methods provide guidance for selection of projection perspectives to utilize to obtain complementary combinations of projection images of an object. The systems and methods provide a bi-dimensional first image of the object which has been obtained from a first perspective. A map of values associated with different candidate perspectives relative to the first perspective is determined, wherein the value associated with a given candidate perspective is determined from at least one parameter indicative of a degree to which the given candidate perspective complements the first perspective and at least one weighting parameter. The map can be displayed or evaluated to select at least one candidate perspective to utilize to acquire or obtain a combination of complementary projection images.

Abstract: Systems and methods provide guidance for selection of projection perspectives to utilize to obtain complementary combinations of projection images of an object. The systems and methods provide a first two-dimensional image of the object which has been obtained from a first perspective having a first spatial orientation with reference to a coordinate system. The systems and methods define a first parameter indicative of a degree to which candidate perspectives complement the first perspective, define at least one scale of values between first and second limits, the first and second limits are associated with first and second candidate perspectives having complementary and non-complementary relations to the first perspective. The systems and methods associate the values to the first parameter for the candidate perspectives and display indicia indicative of the values of the first parameter with reference to the coordinate system as guidance for selecting candidate perspectives.

Abstract: A method for making a three-dimensional surface reconstruction of an object from two or more bi-dimensional images of the object, so called 2D images, comprising: a) providing a three-dimensional dataset, so called 3D dataset, of the object; b) generating a 3D model using the dataset as described in a); c) providing motion information to build a 3D model over time; d) generating a 3D reconstruction from said at least two 2D images; and e) using information from the 3D model over time to correct the 3D reconstruction over time. A corresponding apparatus and computer program are also disclosed and claimed.

Abstract: Systems and methods provide guidance for selection of projection perspectives to utilize to obtain complementary combinations of projection images of an object. The systems and methods provide a first two-dimensional image of the object which has been obtained from a first perspective having a first spatial orientation with reference to a coordinate system. The systems and methods define a first parameter indicative of a degree to which candidate perspectives complement the first perspective, define at least one scale of values between first and second limits, the first and second limits are associated with first and second candidate perspectives having complementary and non-complementary relations to the first perspective. The systems and methods associate the values to the first parameter for the candidate perspectives and display indicia indicative of the values of the first parameter with reference to the coordinate system as guidance for selecting candidate perspectives.

Abstract: Method for assessing a regurgitant flow through a valve into a moving object from a sequence of consecutive image frames of such object, which images are timely separated by a certain time interval, the method comprising the following steps: a) identifying in the images the object of interest; b) augmenting the images to compensate for protocol intensity variation and/or motion and/or background; c) making a time-analysis of augmented images to obtain time-density curve or curves, wherein time-density curves represent a time-evolution of pixel brightness; d) determining a plurality of parameters related to such time-density curve or curves; e) weighting such parameters to provide indications on the regurgitant flow. A corresponding apparatus and computer program are also disclosed.

Abstract: A method for making a three-dimensional surface reconstruction of an object from two or more bi-dimensional images of the object, so called 2D images, comprising: a) providing a three-dimensional dataset, so called 3D dataset, of the object; b) generating a 3D model using the dataset as described in a); c) providing motion information to build a 3D model over time; d) generating a 3D reconstruction from said at least two 2D images; and e) using information from the 3D model over time to correct the 3D reconstruction over time. A corresponding apparatus and computer program are also disclosed and claimed.

Abstract: A method for performing flow analysis in a target volume of a moving organ from sequences of a first and a second magnetic resonance volumetric image data sets of such organ, which data sets are timely separated by a certain time interval, wherein the first volumetric image data sets comprise structural information and three-directional velocity information of the target volume and the second volumetric image data sets comprises structural information of the target volume, the method comprising the following steps: a) determining at least one feature of interest in at least one volume data set of the sequence of second volumetric image data sets; b) tracking the feature of interest within one or more volume data sets of the sequence of the second volumetric data sets; c) determining the spatial orientation over time of a plane containing the feature of interest in the sequence of the second volumetric data sets; d) determining the spatial orientation over time of the plane containing the feature of interes

Abstract: A computer-implemented method for determining a 3D surface reconstruction of an object, which comprises generating a first 3D surface reconstruction of the object from a plurality of 2D images of the object obtained from different perspectives. A region of interest of the object is specified. At least one viewing direction is determined for viewing the specified region of interest. At least one 2D image of the object corresponding to the at least one viewing direction is obtained. A second 3D surface reconstruction of the object is generated from all or part of the 2D images used to generate the first 3D surface reconstruction and the at least one 2D image of the object corresponding to the at least one viewing direction for the specified region of interest. A corresponding apparatus and computer program are also disclosed.

Abstract: Method for assessing a regurgitant flow through a valve into a moving object from a sequence of consecutive image frames of such object, which images are timely separated by a certain time interval, the method comprising the following steps: a) identifying in the images the object of interest; b) augmenting the images to compensate for protocol intensity variation and/or motion and/or background; c) making a time-analysis of augmented images to obtain time-density curve or curves, wherein time-density curves represent a time-evolution of pixel brightness; d) determining a plurality of parameters related to such time-density curve or curves; e) weighting such parameters to provide indications on the regurgitant flow. A corresponding apparatus and computer program are also disclosed.

Abstract: A computer-implemented method for the determination of the optimal image viewing direction of an asymmetrical object is included. The method generates a 3D surface reconstruction of the object from 2D images of the object obtained from different perspectives. A point of interest can be specified in at least one of the used 2D images and an area of interest can be specified in the object where the point of interest lies within. A plane containing view directions with reduced foreshortening for the specified area of interest is generated and a 3D point corresponding to the specified point of interest is determined on the 3D surface reconstruction of the object. At least one particular view direction corresponding to the 3D point and located with the identified plane is considered as the optimal image viewing direction of the asymmetrical object. A corresponding apparatus and computer program are also disclosed.

Abstract: A computer-implemented method for determining a 3D surface reconstruction of an object, which comprises generating a first 3D surface reconstruction of the object from a plurality of 2D images of the object obtained from different perspectives. A region of interest of the object is specified. At least one viewing direction is determined for viewing the specified region of interest. At least one 2D image of the object corresponding to the at least one viewing direction is obtained. A second 3D surface reconstruction of the object is generated from all or part of the 2D images used to generate the first 3D surface reconstruction and the at least one 2D image of the object corresponding to the at least one viewing direction for the specified region of interest. A corresponding apparatus and computer program are also disclosed.

Abstract: A computer-implemented method of processing 2D images of an asymmetrical object, includes: a) generating a 3D surface reconstruction of the object from 2D images of the object obtained from different perspectives; b) generating data specifying a point of interest in at least one 2D image used to generate the 3D surface reconstruction; c) generating data specifying an area of interest in the object, wherein the specified point of interest lies within the specified area of interest; d) identifying a plane containing view directions with reduced foreshortening for the specified area of interest; e) determining a 3D point corresponding to the specified point of interest on the 3D reconstruction of the object; and f) generating data representing at least one particular view direction corresponding to the 3D point and contained with the identified plane. A corresponding apparatus and computer program are also disclosed.