1. An image registration method comprising: performing, at a processor, multi-modality registration of a reference image from first images captured during a first breathing period and a second image; performing, at the processor, single-modality registration of the reference image and each of the others of the first images; generating registration images for the first breathing period responsive to the performed multi-modality registration and the performed single-modality registration; acquiring a third image captured after the first breathing period; and detecting an image corresponding to the third image from among the registration images.