Figure 2c:

Example source images obtained in 39-year-old man with diabetes and diabetic neuropathy for 5 years. Mean ABI was 1.2. (a, b) Spatially matched source images acquired in dark artery (a) and bright artery (b) measurements. (c) Corresponding subtraction image. In this case, prescribed FSD gradients (or first-order gradient moment) are sufficiently sensitive to both large (arrows in a–c) and small (arrowhead in a–c) arterial segments, providing consistent flow suppression effects in them. (d) Subtraction MIP MR angiogram enables delineation of all relevant arterial segments. However, venous blood is not suppressed by FSD owing to substantially slow flow velocity and thus is not depicted on image. DA = dorsal artery, LPA = lateral plantar artery, MPA = medial plantar artery, PTA = posterior tibial artery.