A medical imaging apparatus comprising: a memory configured to store a plurality of X-ray images of a same region of an object; a display; and a controller configured to: control the display to display a first X-ray image including a region of interest, wherein the first X-ray image is among the stored plurality of X-ray images and is of a first type; based on an enlarging instruction while the first X-ray image is displayed, enlarge the region of interest of the first X-ray image, from having a first screen area of a screen to having a second screen area of the screen, wherein the first screen area is different from the second screen area; based on a user input, control the display to display a portion of a second X-ray image in the enlarged region of interest and to display a menu, while displaying the enlarged region of interest, wherein the second X-ray image is among the stored plurality of X-ray images and is of a second type that is based on a selection from the menu and that is different from the first type so that the first X-ray image and the portion of the second X-ray image appear to seamlessly display an entire region of the object; and based on a shifting instruction, while the first X-ray image is displayed and the portion of the second X-ray image is displayed in the enlarged region of interest included in the displayed first X-ray image, shift the portion of the second X-ray image from having a first portion of the enlarged region of interest to having a second portion of the enlarged region of interest, wherein the first portion is different from the second portion; and shift a portion of the first X-ray image to correspond to the shifted portion of the second X-ray image. a memory configured to store a plurality of X-ray images of a same region of an object; a display; and a controller configured to: control the display to display a first X-ray image including a region of interest, wherein the first X-ray image is among the stored plurality of X-ray images and is of a first type; based on an enlarging instruction while the first X-ray image is displayed, enlarge the region of interest of the first X-ray image, from having a first screen area of a screen to having a second screen area of the screen, wherein the first screen area is different from the second screen area; based on a user input, control the display to display a portion of a second X-ray image in the enlarged region of interest and to display a menu, while displaying the enlarged region of interest, wherein the second X-ray image is among the stored plurality of X-ray images and is of a second type that is based on a selection from the menu and that is different from the first type so that the first X-ray image and the portion of the second X-ray image appear to seamlessly display an entire region of the object; and based on a shifting instruction, while the first X-ray image is displayed and the portion of the second X-ray image is displayed in the enlarged region of interest included in the displayed first X-ray image, shift the portion of the second X-ray image from having a first portion of the enlarged region of interest to having a second portion of the enlarged region of interest, wherein the first portion is different from the second portion; and shift a portion of the first X-ray image to correspond to the shifted portion of the second X-ray image. control the display to display a first X-ray image including a region of interest, wherein the first X-ray image is among the stored plurality of X-ray images and is of a first type; based on an enlarging instruction while the first X-ray image is displayed, enlarge the region of interest of the first X-ray image, from having a first screen area of a screen to having a second screen area of the screen, wherein the first screen area is different from the second screen area; based on a user input, control the display to display a portion of a second X-ray image in the enlarged region of interest and to display a menu, while displaying the enlarged region of interest, wherein the second X-ray image is among the stored plurality of X-ray images and is of a second type that is based on a selection from the menu and that is different from the first type so that the first X-ray image and the portion of the second X-ray image appear to seamlessly display an entire region of the object; and based on a shifting instruction, while the first X-ray image is displayed and the portion of the second X-ray image is displayed in the enlarged region of interest included in the displayed first X-ray image, shift the portion of the second X-ray image from having a first portion of the enlarged region of interest to having a second portion of the enlarged region of interest, wherein the first portion is different from the second portion; and shift a portion of the first X-ray image to correspond to the shifted portion of the second X-ray image.