Image processing apparatus, image processing method, and image processing program

An image processing method executed by a computer, the image processing method comprising:

• acquiring a two-dimensional image captured by irradiating a breast with radiation;
• acquiring a position of a radiation source that emits the radiation in a case in which the two-dimensional image is captured;
• acquiring a series of a plurality of projection images or a plurality of tomographic images obtained by performing tomosynthesis imaging of the breast;
• calculating a virtual projection position, which is a position at which the breast is virtually projected during the tomosynthesis imaging, from the position of the radiation source in a case in which the two-dimensional image is captured;
• and
• generating a composite two-dimensional image from the plurality of projection images or the plurality of tomographic images based on the virtual projection position.

A non-transitory storage medium storing an image processing program causing a computer to execute a process comprising:

• acquiring a two-dimensional image captured by irradiating a breast with radiation;
• acquiring a position of a radiation source that emits the radiation in a case in which the two-dimensional image is captured;
• acquiring a series of a plurality of projection images or a plurality of tomographic images obtained by performing tomosynthesis imaging of the breast;
• calculating a virtual projection position, which is a position at which the breast is virtually projected during the tomosynthesis imaging, from the position of the radiation source in a case in which the two-dimensional image is captured;
• and
• generating a composite two-dimensional image from the plurality of projection images or the plurality of tomographic images based on the virtual projection position.