Patent ID: 8611988
Filing Date: 2013-12-17
Classification: A61B,G06T

Abstract:
1. A projection image generation apparatus, comprising: a projection image generation section for generating, using a three-dimensional medical image (V) as an input, a projection image (Ip) on a given projection plane of a display, the projection image being formed by projecting image information on a plurality of visual lines (VL) viewing a first structure in the three-dimensional medical image from a given viewpoint on the given projection plane; a treatment tool position setting section for setting an assumed position (Pt) of a treatment tool in a coordinate space of the three-dimensional medical image (V), the assumed position (Pt) i) corresponding to an actual position of the treatment tool in actual space, and ii) being distinct from the actual position of the treatment tool in actual space in that the assumed position (Pt) of the treatment tool is expressed in the coordinate space of the three-dimensional medical image (V) and the actual position of the treatment tool is expressed in actual space; a surface detection section for detecting a surface (SF) of the first structure from the three-dimensional medical image; a second structure identification section for identifying a second structure (Pi) in the three-dimensional medical image located at a position masked by the first structure (SF) when the first structure is viewed from the assumed position (Pt) of the treatment tool; and an intersection point detection section for detecting an intersection point (Pa) between an assumed movement path (TL the projection image generation section generates the projection image (Ip) in which the intersection point (Pa) displayed in an identifiable manner at a position on the projection plane to which the image information on a corresponding visual line (VL the image information on the corresponding visual line (VL the assumed movement path (TL