Dissection process estimation device and dissection process navigation system

A dissection process estimation device comprising:

• a surgery process case database that stores case data of a surgery process describing a dissection surface corresponding to a dissection site of a dissection target organ and a dissection process providing information about progress of dissection;
• a standard dissection process generation unit that reads case data corresponding to a dissection site designated by a user from the surgery process case database, and generates a standard dissection surface and a standard dissection process based on a plurality of pieces of case data that have been read;
• an anatomical reference point extraction unit that extracts an anatomical reference point from patient-specific three-dimensional medical image data;
• and
• a patient-specific dissection process estimation unit that performs matching of the standard dissection surface and the standard dissection process with the patient-specific three-dimensional medical image data, and estimates a patient-specific dissection surface and a patient-specific dissection process, wherein
• the information about progress of dissection is expressed by using a set V of vertexes of each mesh representing the dissection target organ and an element set E,
• the set V is expressed, by a vertex vector vi constituted by a plurality of pieces of information provided to each of the vertexes, as
• V={v0,v1, . . . ,vn−1},
• the vertex vector vi is expressed, by using vertex coordinates (x, y, z) providing information of each of the vertexes, a time stamp (time), an anatomical structure label (label), first attribute information (isFreezed), second attribute information (isCutpath), and third attribute information (isSurface), as
• vi=(x,y,z,time,label,isFreezed,isCutpath,isSurface),
• the time stamp (time) shows in what order a corresponding vertex is dissected, the anatomical structure label (label) is a value showing an anatomical structure,
• the first attribute information (isFreezed) shows whether the corresponding vertex is a fixed point or a free point,
• the second attribute information (isCutpath) shows whether or not the corresponding vertex is presented on the dissection surface,
• the third attribute information (isSurface) shows whether the corresponding vertex is on a surface or inside of the dissection target organ, and
• the element set E is a set of combinations of vertexes providing individual elements constituting each of the each mesh.

A dissection process navigation system comprising:

• a surgery process case database that stores case data of a surgery process describing a dissection surface corresponding to a dissection site of a dissection target organ and a dissection process providing information about progress of dissection;
• a standard dissection process generation unit that reads case data corresponding to a dissection site designated by a user from the surgery process case database, and generates a standard dissection surface and a standard dissection process based on a plurality of pieces of case data that have been read;
• an anatomical reference point extraction unit that extracts an anatomical reference point from patient-specific three-dimensional medical image data;
• a patient-specific dissection process estimation unit that performs matching of the standard dissection process with the patient-specific three-dimensional medical image data, and estimates a patient-specific dissection process;
• and
• a display device that displays the patient-specific dissection process estimated in the patient-specific dissection process estimation unit.