PROBLEM TO BE SOLVED: To support the vulnerability analysis of blood vessel plaque using MR images without inserting a catheter.SOLUTION: A fat suppression T1-weighted image input unit 31a reads a fat suppression T1-weighted image, and a 3D-FASE image input unit 31b reads a 3D-FASE image. A blood vessel plaque extraction unit 32 extracts a blood vessel plaque region from each of the read fat suppression T1-weighted image and 3D-FASE image. A blood vessel plaque analysis unit 33 extracts a region wherein a signal value is a prescribed threshold or lower in both of the fat suppression T1-weighted image and the 3D-FASE image in the extracted blood vessel plaque region as a stable plaque region. Further, the blood vessel plaque analysis unit 33 estimates an instable plaque region using the extracted stable plaque region.
