“…The second part was an anatomic vascular study, which evaluated the vascular visibility of vessels of different diameters, the visibility of the smallest reflecting spatial resolution, and from different territories. Most vessels were listed from the literature, 9,10,13,17,22,26,30,34 but some were added to complete the list. The visibility of venous drainage and of small-diameter arteries has important clinical implications because it can help to determine the risk of neurologic complications and the therapeutic strategy for vascular malformations.…”