ABSTRACT
Radiographic imaging is taken to mean anything that involves imaging with X-ray photons which are transmitted through the patient. One key goal in radiographic imaging is to distinguish different materials from each other. Images at megavoltage energies represent an even more extreme energy range and are relevant for imaging performed with a linear accelerator beam. The result is an image that is broken up into equal-sized squares or “pixels”. The pixelization of images is a key concept and influences the resolution of an imaging system. A final topic that is important to all of imaging is the representation and storage of image data. The density is apparently lower in the center of the image than in the periphery. This is due to the larger scatter contribution in the center of the image which is especially pronounced in cone-beam Computed tomography.
