Abstract: A drawing apparatus includes a flow line generation section configured to generate the flow line from a predetermined start position; a view setting section configured to set the viewpoint position in the 3D-space; a band-of-facets forming section configured to form a band of facets connecting a plurality of polygon facets along the flow line based on the set viewpoint position; and a texture mapping section configured to map texture onto each of the plurality of polygon facets. The texture represents reflected light on the band of facets with respect to a light source placed at a predetermined position in the 3D-space.

Abstract: A computer sets a first point on a first part in a plurality of tomographic images of an organ. The computer determines a relative position of the first point with respect to reference positions of the first part and a second part in the tomographic images. The computer sets a second point in association with the first point, on the first part in a 3D model representing a structure of the organ, such that a relative position of the second point with respect to reference positions of the first part and the second part in the 3D model matches the relative position of the first point. Then, the computer deforms the 3D model such that, when the tomographic images and the 3D model are placed in the same coordinate system, the position of the second point matches that of the first point.

Abstract: A method includes: obtaining designated 3D template for a designated part in a heart; generating 3D annulus data representing an annulus of a heart valve identified as a reference of transformation, from a cross-section image in a plane passing through an axis within the annulus of the identified heart valve in 3D volume data generated from tomographic images; identifying a first point on the annulus of the identified heart valve in the designated 3D template and a second point on the annulus represented by the 3D annulus data; arranging n starting points from the first point on the annulus of the identified heart valve in the designated 3D template and n target points from the second point on the annulus represented by the 3D annulus data; and calculating movement destination coordinates of vertices of polygons relating to the designated 3D template to transform the designated 3D template.

Abstract: An object operation device for operating an object displayed on a display device, the object operation device includes a coordinate system generation unit that generates a local coordinate system for each of a plurality of points set around a reference object that is a reference of an operation when a target object is moved three-dimensionally by the operation, a move destination coordinates calculation unit that calculates move destination coordinates of the target object corresponding to a move command value of the target object inputted through an input device based on the local coordinate system of each of the generated plurality of points, and a moving process unit that moves the target object to the calculated move destination coordinates.

Abstract: A method includes: obtaining designated 3D template for a designated part in a heart; generating 3D annulus data representing an annulus of a heart valve identified as a reference of transformation, from a cross-section image in a plane passing through an axis within the annulus of the identified heart valve in 3D volume data generated from tomographic images; identifying a first point on the annulus of the identified heart valve in the designated 3D template and a second point on the annulus represented by the 3D annulus data; arranging n starting points from the first point on the annulus of the identified heart valve in the designated 3D template and n target points from the second point on the annulus represented by the 3D annulus data; and calculating movement destination coordinates of vertices of polygons relating to the designated 3D template to transform the designated 3D template.

Abstract: A method of visualizing visualization object data by creating a visualized image, including setting a visualization requirement; determining each node from a root node to a leaf node as a selected node, and determining whether or not the selected node satisfies the visualization requirement; registering nodes in a selected-node list for creating a visualization image when the selected node is a leaf node or has been determined to satisfy the visualization requirement, while replacing the selected node with child nodes of the selected node, and by making the child nodes new candidates for the selected node when the selected node has been determined not to satisfy the visualization requirement; outputting the selected-node list when there are no selected nodes to be processed; and creating the visualized image based on the visualization object data and node coordinate data associated with the respective nodes registered in the selected-node list.