| 摘要 |
A process for generating animated graphical images of a vascular structure attached to an anatomical structure includes the steps of: generating and arranging a plurality of anatomical patches in rest positions to form an anatomical patch surface representing an anatomical structure disposed in a rest position; and generating and arranging at least one vascular patch over the anatomical structure in the rest position, the vascular patch having an associated array of control points configured to form a closed surface of a vascular structure having a closed transverse cross section; and establishing a binding positional relationship between at least a portion of the control points and the anatomical patch surface by determining binding points on the surface of at least one selected anatomical patch in a rest position. The control points of each vascular patch include at least one transverse cross-sectional subset of control points that are disposed proximate an associated transverse cross-section of the vascular structure, each control point of the subset having a common binding point. The common binding point is located at a closest point on the surface of the selected anatomical patch to a selected one of the control points of the transverse cross-sectional subset. The process provides for generating images of a vascular structure attached to an animated anatomical structure, wherein the vascular structure is modeled by parametric surface patches, wherein the vascular layer may have an elastic quality, and wherein the transverse cross section of the vascular structure is not flattened during animation.
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