Medical image processing device, storage medium, medical device, and treatment system

A computer-readable non-transitory storage medium storing a medical image processing program for causing a computer to function as a medical image processing device including:

• a first image acquirer configured to acquire a first fluoroscopic image of a patient;
• a second image acquirer configured to acquire a second fluoroscopic image according to radiation with which the patient is irradiated at a time point different from a time point of acquisition of the first fluoroscopic image from a photography device that detects radiated radiation with a detector and performs an imaging process;
• a generator configured to generate a reconstructed image obtained by reproducing the second fluoroscopic image from the first fluoroscopic image virtually arranged in a three-dimensional space on the basis of an installation position of the detector in the three-dimensional space;
• and
• a calculator configured to obtain a suitable position on the first fluoroscopic image in the three-dimensional space on the basis of a degree of similarity between the second fluoroscopic image and the reconstructed image,
• wherein the generator generates the reconstructed image which is for use in the calculator and has a range larger than a range corresponding to the second fluoroscopic image.