Abstract: According to an embodiment, a medical image processing device includes an image acquirer, a trajectory generator, and a selector. The image acquirer acquires a plurality of fluoroscopic images by imaging a patient. The trajectory generator recognizes a position of a part of interest shown in each of the plurality of fluoroscopic images and generates a trajectory of a state in which the part of interest has moved based on the recognized position of the part of interest. The selector selects a tracking method for tracking the part of interest based on the trajectory of the part of interest.

Abstract: According to an embodiment, a medical image processing device includes a first image acquirer, a second image acquirer, a treatment error acquirer, a difference calculator, and a differential statistical quantity calculator. The first image acquirer acquires a first fluoroscopic image of a patient. The second image acquirer acquires a second fluoroscopic image photographed at a timing different from the first fluoroscopic image. The treatment error acquirer acquires a treatment error occurring when an alignment process is performed or a treatment error occurring in treatment. The difference calculator calculates a difference image between the second fluoroscopic image to which the virtual perturbation is applied at the position of the patient shown therein based on the treatment error and the first fluoroscopic image.

Abstract: According to an embodiment, a radiation therapy device includes an acquirer, a projection position calculator, an element projection image generator, and an element projection image synthesizer. The acquirer acquires a condition of X-ray imaging in a treatment stage and a three-dimensional image of a patient imaged before the treatment stage. The projection position calculator calculates a projection position when each of pixels included in the three-dimensional image is projected onto a two-dimensional X-ray fluoroscopic image generated in the X-ray imaging on the basis of the condition of the X-ray imaging. The element projection image generator generates an element projection image for each pixel when each of the pixels included in the three-dimensional image is projected onto the X-ray fluoroscopic image. The element projection image synthesizer performs a synthesis process for the element projection image for each pixel on the basis of the projection position to generate a reconstructed image.