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Dorsalis pedis artery

The dorsalis pedis artery (DPA) is the direct continuation of the anterior tibial artery beyond the ankle joint. It is the principal artery of the dorsum of the foot, supplying oxygenated blood to the dorsal structures of the foot and toes. Clinically, it is one of the most important palpable pulses in the lower limb, serving as a key indicator of peripheral arterial perfusion.

The dorsalis pedis artery runs superficially on the dorsum of the foot, making it easily accessible for palpation, ultrasound, and interventional imaging. It plays a major role in the collateral circulation between anterior and posterior tibial systems, contributing to the plantar arch through its terminal branches.

Synonyms

  • Pedal artery

  • Arteria dorsalis pedis

  • Dorsal artery of foot

Origin, Course, and Termination

  • Origin: Continuation of the anterior tibial artery distal to the ankle joint, midway between the malleoli.

  • Course: Passes anterior to the ankle joint, over the dorsum of the foot, between the tendons of the extensor hallucis longus (medially) and extensor digitorum longus (laterally).

  • Termination: At the proximal first intermetatarsal space, where it divides into:

    • First dorsal metatarsal artery

    • Deep plantar artery, which passes between the first and second metatarsal bases to join the plantar arch.

Branches

  • Lateral tarsal artery

  • Arcuate artery

  • Medial tarsal arteries

  • First dorsal metatarsal artery

  • Deep plantar artery (terminal branch)

Relations

  • Anteriorly: Skin and fascia of the dorsum of the foot

  • Posteriorly: Tarsal bones, talus, navicular, and dorsal ligaments

  • Medially: Tendon of extensor hallucis longus

  • Laterally: Tendons of extensor digitorum longus

  • Accompanied by: Deep fibular (peroneal) nerve on its lateral side

Function

  • Primary arterial supply to the dorsum of the foot and toes

  • Forms collateral circulation via the deep plantar branch joining the plantar arch

  • Contributes to digital perfusion, particularly the great toe and second toe through its branches

  • Clinical marker: The dorsalis pedis pulse is a vital sign of arterial patency and peripheral perfusion

Clinical Significance

  • Palpation site: Located lateral to the tendon of the extensor hallucis longus at the midfoot

  • Occlusion/stenosis: Indicates peripheral arterial disease (PAD) or diabetic vascular compromise

  • Aneurysm or pseudoaneurysm: Rare but may follow trauma or iatrogenic puncture

  • Surgical relevance: Used in bypass grafting and flap perfusion assessments

  • Imaging role: Frequently assessed in vascular studies, angiography, MRA, and CTA for ischemia, emboli, or trauma

MRI Appearance

  • T1-weighted images:

    • Normal artery: low signal tubular structure within bright perivascular fat.

    • Surrounding muscle: intermediate signal.

    • Flowing blood appears as a signal void (black lumen).

  • T2-weighted images:

    • Vessel lumen remains flow void (dark) in normal laminar flow.

    • Turbulent or slow flow may cause intraluminal hyperintensity.

    • Adjacent soft tissue: intermediate signal.

  • STIR:

    • Perivascular fat suppressed; artery appears as a dark linear void.

    • Pathologic enhancement of wall or perivascular edema becomes bright.

  • Proton Density Fat-Saturated (PD FS):

    • Artery visible as a flow void; surrounding soft tissues homogeneous.

    • Helpful in assessing vessel course and perivascular inflammation.

  • Normal T1 FS Axial Post-Contrast:

    • Dorsalis pedis artery shows strong homogeneous enhancement after gadolinium contrast.

    • Lumen appears bright against fat-suppressed dark background.

    • Useful for evaluating arterial wall integrity, enhancement defects, and small aneurysms.

MR Angiography (MRA) – Contrast Enhanced

  • Technique: 3D contrast-enhanced MRA using gadolinium provides high-resolution vascular mapping.

  • Normal appearance:

    • Dorsalis pedis artery appears as a continuous, bright linear structure on maximum intensity projection (MIP) images.

    • Smooth tapering course from ankle to first intermetatarsal space.

  • Pathology:

    • Stenosis: Segmental or focal signal narrowing.

    • Occlusion: Abrupt loss of flow-related enhancement.

    • Aneurysm: Focal bulbous enhancement.

    • Collateral vessels: Seen in chronic occlusion or PAD.

  • Clinical role: Gold standard noninvasive method for assessing distal arterial patency, ischemia, or traumatic injury.

CT Appearance

Non-Contrast CT:

  • Artery not distinctly visualized due to similar attenuation as surrounding soft tissue.

  • May identify arterial calcifications in chronic atherosclerosis.

Post-Contrast CT (standard):

  • Artery shows enhancement during arterial phase; appears as a bright linear structure over tarsal bones.

  • Useful for preoperative vascular mapping or trauma evaluation.

CT Angiography (CTA)

  • Technique: High-resolution helical CTA with contrast during arterial phase.

  • Normal appearance:

    • Dorsalis pedis artery shows uniform bright enhancement from ankle to the first intermetatarsal space.

    • Visualizes arterial branches and their anastomoses with the plantar arch.

  • Pathology:

    • Stenosis: Focal luminal narrowing with reduced enhancement.

    • Occlusion: Absence of contrast filling distal to obstruction.

    • Aneurysm or pseudoaneurysm: Focal outpouching or contained extravasation.

    • Atherosclerosis: Calcified plaques visible along arterial wall.

  • Clinical role: Preferred for evaluation of peripheral vascular disease, traumatic arterial injury, and pre-surgical arterial mapping.

MRI images

dorsalis pedis artery axial cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI images

dorsalis pedis artery axial cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00001

MRI images

dorsalis pedis artery coronal cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00002

CT images

dorsalis pedis artery ct axial