Gadolinium-enhanced computed tomographic aortography.

Radiographic contrast agents using gadolinium have a better safety profile and photoelectric effect than iodinated contrast, allowing use where iodinated contrast is contraindicated. A case of gadolinium-enhanced computed tomographic aortography (CTA) for suspected thoracic dissection is reported. Aortic enhancement was sufficient for confident exclusion of an intimal flap. The findings were later confirmed by MRI. Vascular enhancement diminished below the diaphragm and tissue enhancement was minimal. Gadolinium diethylenetriamine penta-acetic acid (Gd-DTPA) may be used for CTA of the thoracic aorta, where the use of iodinated contrast is contraindicated. Multi-slice CT may expand the role of gadolinium enhancement in the future.