The method described above, wherein the entire object is captured in one image, can also be referred to as tomography “in the image”, as in image processing.  At times, the entire measured object cannot be captured in one image. The field of view of the X-ray sensor in the object plane defined by the selected magnification may be smaller than the object in all or certain rotational positions. The solution is raster tomography.  Several segments of the measured object are captured in sequence, and the images are stored as a stack. The corresponding pixel or voxel information is merged for the entire object for analysis. This method can be referred to as tomography “at the image”. Several partial images of the measured object can be captured by the machine by shifting the X-ray unit, or by shifting the measurement table with the rotary axis and the measured object.  When measuring objects that are larger than the sensor size, the measuring machine must have positioning axes with sufficient travel. In this manner, the overall measurement range can be increased to a multiple of the sensor size.

See in above image Raster tomography for expanding the measurement range a) The work piece exceeds the area of the X-ray sensor, b) By shifting the work piece relative to the sensor,  different regions of the work piece are captured in sequence, c) The resulting partial images are merged together precisely to form the overall image.