Iodinated contrast is a form of intravenous radiocontrast (radiographic dye) containing iodine, which enhances the visibility of vascular structures and organs during radiographic procedures. Some pathologies, such as cancer, have particularly improved visibility with iodinated contrast.

Iodinated contrast media may either be oil-based or water-soluble, the former of which is slowly absorbed by body tissue and is usually only used in sialographic and hysterosalpingographic examinations. Water-soluble iodinated medium, which is more quickly absorbed, may be used in place of barium sulfate for gastrointestinal studies that are contraindicated by the use of barium for that reason.

Iodinated medium may also be either ionizing or non-ionizing. The ionizing type tends to create a high osmolality in blood and may cause a contrast media reaction in some individuals, which may be life-threatening for those with certain medical conditions. The non-ionizing decreases this risk, but is much more expensive.

References

• Bontranger, Kenneth L. & Lampignano, John P. (2005). Radiographic Positioning and Related Anatomy, St. Louis: Elsevier Mosby. ISBN 0323025072.

Radiology | Iodine