Disclosed is a method of changing at least one of a direction and position of a plane selection line for acquiring an image of a plane of interest of an object. The method includes acquiring a medical image of an object, displaying a first plane image acquired along a first plane selection line of the medical image, setting a pattern which is used to change at least one of the direction and position of the plane selection line, changing at least one of the direction and position of the plane selection line, based on the set pattern, and displaying a second plane image acquired along the changed plane selection line.
