1. A medical image processing apparatus comprising: a valve extractor which extracts a living valve image by analyzing 3D image data related to an anatomical part of a subject; a specifier which specifies distribution of an amount of calcium in the living valve image from CT values of pixels in the living valve image; and a calculator which calculates distribution of difficulty levels of implanting an artificial valve to the anatomical part in the living valve image based on a comparison between the amount of calcium and a predetermined set value.