A medical imaging apparatus and method capable of simultaneously displaying sagittal plane images and axial plane images of both breasts and navigating through the images . The medical imaging apparatus includes a data acquirer configured to acquire first volume data including first sections of a left breast and a right breast of an object, an image processor configured to generate second volume data including second sections of the left breast and the right breast of the object, based on the first volume data, generate a sagittal plane image and an axial plane image of the first breast and the second breast, based on the first volume data or the second volume data. A display is configured to display a user interface (UI) screen image including the sagittal plane image and the axial plane image.