What method helps to evaluate the arteries of the neck and brain ?
A variety of techniques can be used to generate the pictures , such as administration of a paramagnetic contrast agent ( gadolinium ) or using a technique known as " flow - related enhancement " ( e.g. , 2 D and 3 D time - of - flight sequences ) , where most of the signal on an image is due to blood that recently moved into that plane , see also FLASH MRI .