An X-ray radiography apparatus, comprising: - an X-ray source; - an X-ray detector; - a camera; - a processing unit; and - an output unit; wherein, the X-ray source is configured to be placed relative to the X-ray detector to form an examination region for the accommodation of an object; wherein the X-ray detector has at least one exposure chamber configured to measure an exposure level of X-rays; or wherein the X-ray detector has an active area configured to detect X-rays; wherein, a reference spatial coordinate system is defined on the basis of geometry parameters of the X-ray radiography apparatus; wherein, the camera is configured to be located at a position and orientation to view the examination region and the camera is configured to acquire depth imagery within a camera spatial coordinate system, wherein within the depth imagery pixel values represent distances for corresponding pixels; wherein, the camera position and orientation have been calibrated with respect to the reference spatial coordinate system to yield a mapping function that maps a spatial point within the camera spatial coordinate system to a corresponding spatial point in the reference spatial coordinate system; wherein, the camera is configured to acquire a depth image of the object within the camera spatial coordinate system and provide the depth image to the processing unit; wherein, the processing unit is configured to use the mapping function to transform the depth image of the object within the camera spatial coordinate system to the reference spatial coordinate system and generate a synthetic 2D image within the reference spatial coordinate system, wherein the processing unit is configured to generate the synthetic 2D image by utilising the depth image or a regular 2D image acquired by the camera; characterised in that the processing unit is configured to generate a representation of the extent of the at least one exposure chamber within the reference spatial coordinate system, and wherein the processing unit is configured to generate the synthetic 2D image having the representation of the extent of the at least one exposure chamber at the position of the object; or wherein the processing unit is configured to generate a representation of the extent of the active area within the reference spatial coordinate system, and wherein the processing unit is configured to generate the synthetic 2D image having the representation of the extent of the active area at the position of the object, respectively; and wherein, the output unit is configured to output the synthetic 2D image with the representation of the extent of the at least one exposure chamber at the position of the object to an operator of the apparatus; or the representation of the extent of the active area at the position of the object to an operator of the apparatus, respectively. - an X-ray source; - an X-ray detector; - a camera; - a processing unit; and - an output unit; wherein, the X-ray source is configured to be placed relative to the X-ray detector to form an examination region for the accommodation of an object; wherein the X-ray detector has at least one exposure chamber configured to measure an exposure level of X-rays; or wherein the X-ray detector has an active area configured to detect X-rays; wherein, a reference spatial coordinate system is defined on the basis of geometry parameters of the X-ray radiography apparatus; wherein, the camera is configured to be located at a position and orientation to view the examination region and the camera is configured to acquire depth imagery within a camera spatial coordinate system, wherein within the depth imagery pixel values represent distances for corresponding pixels; wherein, the camera position and orientation have been calibrated with respect to the reference spatial coordinate system to yield a mapping function that maps a spatial point within the camera spatial coordinate system to a corresponding spatial point in the reference spatial coordinate system; wherein, the camera is configured to acquire a depth image of the object within the camera spatial coordinate system and provide the depth image to the processing unit; wherein, the processing unit is configured to use the mapping function to transform the depth image of the object within the camera spatial coordinate system to the reference spatial coordinate system and generate a synthetic 2D image within the reference spatial coordinate system, wherein the processing unit is configured to generate the synthetic 2D image by utilising the depth image or a regular 2D image acquired by the camera; characterised in that the processing unit is configured to generate a representation of the extent of the at least one exposure chamber within the reference spatial coordinate system, and wherein the processing unit is configured to generate the synthetic 2D image having the representation of the extent of the at least one exposure chamber at the position of the object; or wherein the processing unit is configured to generate a representation of the extent of the active area within the reference spatial coordinate system, and wherein the processing unit is configured to generate the synthetic 2D image having the representation of the extent of the active area at the position of the object, respectively; and wherein, the output unit is configured to output the synthetic 2D image with the representation of the extent of the at least one exposure chamber at the position of the object to an operator of the apparatus; or the representation of the extent of the active area at the position of the object to an operator of the apparatus, respectively.