Fig. 1

a, b Schematic axial diagram of normal knee anatomy and Axial PDFS MRI of normal knee anatomy showing the popliteal artery (arrowhead) located posterior to the popliteal muscle (PM). c, d Schematic axial diagram and Axial PDFS MRI of the knee that show the aberrant anterior tibial artery (arrow) between the tibial cortex and the popliteal muscle (PM). Fibula (F), Gastrocnemius muscle media head (GMmh), Gastrocnemius muscle lateral head (GMlh). Figure created by J. Marin-Concha