Is a venogram/arteriogram better than ultrasound to evaluate veins/arteries in the foot?

Although: angiography is often considered the "gold standard" for imaging the vasculature, it is relatively invasive and has more potential for complications. The vast majority of clinical questions can be answered with non invasive tests such as ultrasound, CTA, or MRA, with angiography reserved for therapeutic interventions, preoperative planning, and other special circumstances.