A 48-year-old female amateur marathon runner with 6 years of running experience, a running pace of 6:30 min/s/km, a weekly running distance of 40 km, and a non-rearfoot strike pattern. Sagittal fs-PDWI showing increased signal in the Achilles tendon insertion (arrow) and bone marrow edema-like signal intensity in the adjacent calcaneus (arrowhead)