Aorta

1-Adventages of MD CT:

- The whole aorta can be imaged in the true arterial phase with high spatial resolution.

- Compared with catheter angiography, CTA is superior in demonstrating mural thrombus, peri aneurysmal blood and presence of non-vascular abdominal disease.

- Magnetic resonance angiography (MRA) (3D contrast-enhanced MRA) has a few limitations because it depicts only the lumen and for evaluation of mural thrombus and the vessel wall additional sequences are needed.

 2-A few disadvantages of CTA in this clinical scenario have been documented. These include occasional failures to opacify the false lumen, and poor demonstration of the complications of Type A dissections such as aortic valvular and coronary involvement. However, the advantages of speed and easy access make MDCTA the investigation of choice in traumatic injury