1. An image processing apparatus comprising processing circuitry configured to: generate, from three-dimensional medical image data, a first cross-sectional image and a second cross-sectional image intersecting the first cross-sectional image; arrange, on a display, the first cross-sectional image to be located in an extending direction of an intersecting line with the first cross-sectional image drawn in the second cross-sectional image; and change display locations of the first cross-sectional image and the second cross-sectional image on the display, in conjunction with a change in an intersecting location of the first and the second cross-sectional images.