Figure 3: A, B & C: Normal anatomy of the anal canal in MRI: T1WI & T2WI Coronal and Axial T1WI images showing: the internal sphincter (white curved arrow), external sphincter (yellow arrows), and levator ani (red arrows) seen in the coronal image, IAF (ischio-anal fossa), IRF (ischio-rectal fossa), anal canal (orange diamond).