An X-ray Computed Tomography imaging apparatus, comprising: an imaging device for radiating light onto an object and detecting light having been transmitted through the object, said imaging device including: a light source for radiating the light onto the object; a detector for detecting the light having been transmitted through the object; a manipulation console comprising a data processing device for obtaining a reconstructed three-dimensional image and a mamipulation device; wherein said data processing device comprises a magnification ratio determination unit for determining a magnification ratio for images of the object using at least one of hardware attributes of the imaging device and a size of an input voxel inputted via said manipulation device for the reconstructed 3D image, wherein the hardware attributes comprise at least one of a focal spot size (f) of the light source, a pixel size (d) of the detector, and resolution of the imaging device; and a magnification ratio controller for moving at least one of the light source and the detector in accordance with the determined magnification ratio, characterized in that the magnification ratio determination unit comprises: a first magnification ratio determination unit for determining a first magnification ratio based on the hardware attributes of the imaging device; a second magnification ratio determination unit for determining a second magnification ratio (Pm) based on the size of the input voxel (E v); and a third magnification ratio determination unit for determining a value in the range defined by the first magnification ratio and the second magnification ratio to be the magnification ratio to be used by the controller for moving the light source and/or detector for obtaining the images of the object. an imaging device for radiating light onto an object and detecting light having been transmitted through the object, said imaging device including: a light source for radiating the light onto the object; a detector for detecting the light having been transmitted through the object; a manipulation console comprising a data processing device for obtaining a reconstructed three-dimensional image and a mamipulation device; wherein said data processing device comprises a magnification ratio determination unit for determining a magnification ratio for images of the object using at least one of hardware attributes of the imaging device and a size of an input voxel inputted via said manipulation device for the reconstructed 3D image, wherein the hardware attributes comprise at least one of a focal spot size (f) of the light source, a pixel size (d) of the detector, and resolution of the imaging device; and a magnification ratio controller for moving at least one of the light source and the detector in accordance with the determined magnification ratio, a light source for radiating the light onto the object; a detector for detecting the light having been transmitted through the object; a manipulation console comprising a data processing device for obtaining a reconstructed three-dimensional image and a mamipulation device; wherein said data processing device comprises a magnification ratio determination unit for determining a magnification ratio for images of the object using at least one of hardware attributes of the imaging device and a size of an input voxel inputted via said manipulation device for the reconstructed 3D image, wherein the hardware attributes comprise at least one of a focal spot size (f) of the light source, a pixel size (d) of the detector, and resolution of the imaging device; and a magnification ratio controller for moving at least one of the light source and the detector in accordance with the determined magnification ratio, characterized in that the magnification ratio determination unit comprises: a first magnification ratio determination unit for determining a first magnification ratio based on the hardware attributes of the imaging device; a second magnification ratio determination unit for determining a second magnification ratio (Pm) based on the size of the input voxel (E v); and a third magnification ratio determination unit for determining a value in the range defined by the first magnification ratio and the second magnification ratio to be the magnification ratio to be used by the controller for moving the light source and/or detector for obtaining the images of the object. a first magnification ratio determination unit for determining a first magnification ratio based on the hardware attributes of the imaging device; a second magnification ratio determination unit for determining a second magnification ratio (Pm) based on the size of the input voxel (E v); and a third magnification ratio determination unit for determining a value in the range defined by the first magnification ratio and the second magnification ratio to be the magnification ratio to be used by the controller for moving the light source and/or detector for obtaining the images of the object.