Is CTA or MRA preferred for assessment of the calf and foot vessels?
Both have strengths and weaknesses. CTA ensures reasonable temporal uniformity of arterial opacification, so long as the contrast bolus is not outrun. Multistation MRA may be so delayed as to lead to venous opacification in the calves, making it difficult to distinguish between artery and vein. However, MRA is preferred when heavily calcified arteries are present.
