Dynamic image processing method and dynamic image processing device

A dynamic image processing method in a dynamic image processing device performing an image processing of a dynamic image which is obtained by radiographing of a dynamic state of a living body, the method comprising:

• a setting step of setting a reference motion;
• a corresponding point setting step of setting a corresponding point according to the reference motion among frame images of the dynamic image for each pixel of the dynamic image;
• a determination step of determining an enhancement degree of each pixel of each of the frame images of the dynamic image based on equality of a density distribution in a target time range of a small region surrounding the corresponding point set for each pixel at the corresponding point setting step;
• and
• an enhancement/attenuation processing step of performing enhancement processing or attenuation processing to each of the frame images of the dynamic image based on the enhancement degree determined at the determination step,
• wherein the setting step comprises a specification step of specifying a reference structure, and includes setting a motion of the reference structure specified at the specification step as the reference motion, and
• wherein the performing of the enhancement processing is performed only on those pixels of the dynamic image which move in the same direction as the reference structure, by comparison of the reference motion vectors of the entire image to the motion vectors of the reference structure.