Patent ID: 7774045

Claim:
A medical guiding system, comprising: detecting means for detecting position and orientation of a medical instrument; preserving means for preserving medical image data obtained before use of the medical instrument; correcting means for correcting, in the medical image data, at least one of position and direction of at least one of a viscus and an organ, in accordance with body position of a subject; and calculating means for calculating position of the medical instrument in the medical image data corrected by the correcting means, based on at least one of position and orientation of the medical instrument detected by the detecting means, wherein the preserving means preserves therein as the medical image data: subject's own medical image data of the subject himself/herself obtained before use of the medical instrument, first reference medical image data obtained before use of the medical instrument, from another subject in the same body position as that of the subject when the subject's own medical image data was obtained, and second reference medical image data obtained before use of the medical instrument, from the another subject in a body position different from that of the subject when the subject's own medical image data was obtained, and the correcting means calculates, based on the subject's own medical image data and the first reference medical image data, a displacement of at least one of position and direction of at least one of a viscus and an organ, the correcting means correcting, based on the calculated displacement, at least one of position and direction of at least one of a viscus and an organ of the second reference medical image data.