Vascular computed tomography angiography technique and indications

Computed tomography angiography (CTA) is a quick, non-invasive method to visualize the vasculature; in most cases with the help of iodinated contrast material (ICM). Modern CT scanners can provide sub-millimeter isotropic three-dimensional (3D) datasets within a single breath-hold during the first pass of intravenous ICM with excellent spatial and temporal resolution. There are varied applications of CTA including various vascular conditions in different vascular territories. However, the basic principles of CTA remain the same i.e., maintaining good contrast opacification in the anatomy of interest during the length of image acquisition. Hence the timing of image acquisition with respect to the contrast injection and the amount of ICM are critical