Radiophysics For Medical Students

Main factor affecting the Contrast in a Radiograph is KVp as is evidenced by the figure if we use high KVp it pass through both the bones and the soft tissues unaffected and will result in poor contrastwhile if we use Low KVp it will penetrate soft tissues while it may be attenuated by bones or high density structures thus generating a High Contrast Image. Hence, Contrast is inversely propotional to KVp.