Computed tomographic angiographic protocols are robust and relatively operator independent. Computed tomographic angiographic protocols that are designed to exclude dissections typically begin with low-dose noncontrast CT to exclude the possibility of IMH, followed by contrast-enhanced computed tomographic angiography.
The coverage includes the entire thorax, abdomen, and pelvis to allow delineation of the extent of a flap and its extension into branch vessels and to evaluate for end-organ ischemia (e.g., bowel or kidneys), and possible extravasation.1 Examples of computed tomographic angiography are illustrated in Figures 33 and 34..