Contrast imaging in Head and Neck

The contrast agents permit fine details of internal structure or organs that would not otherwise be demonstrable. The strikingly high resilience of current contrast medium has been accomplished through progressive improvements in chemical pharmacological technology. In the field of Diagnostic Radiology for the selection of contrast media it is necessary to have some understanding of the physical and physiological principles involved. The objective is to provide a background for non-specialists on the complicated specialist subject. Nowadays Contrast enhanced Radiography is widely used as an important diagnostic tool.