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Radiology
Magnetic Resonance Imaging of the Foot and Ankle
Built from Fundamentals of Diagnostic Radiology
What’s inside
6 sections · 64 slides
Overview
- Role of MRI in the foot and ankle
- Foot and ankle MRI: the five main areas
Tendons
The flexor tendons fail most; the extensors rarely do
- Why tendons are imaged
- Normal ankle tendon anatomy
- Four patterns of tendon injury
- Tenosynovitis and tendinosis
- Partial tear and rupture
- Achilles tendon basics
- Treating an Achilles rupture
- Torn Achilles tendon
- The three flexor tendons
- Posterior tibial tendon and the arch
- PTT: partial tear versus rupture
- PTT on MRI
- Posterior tibial tendon tendinosis
- Torn posterior tibial tendon
- Flat foot and the spring ligament
- Abnormal spring ligament
- How a PTT tear progresses
- 92%
- Finding the FHL tendon
- FHL in ballet dancers
- Peroneal tendon anatomy
- Peroneal tendon dislocation
- Dislocated peroneus longus tendon
- Peroneal entrapment and rupture
- Longitudinal split tear of the peroneus brevis
- Longitudinal split tear of the peroneus brevis
Avascular Necrosis
Bone death in the talar dome and tarsal bones
- Osteochondral lesion of the talar dome
- Reading an OCL for instability
- Unstable osteochondritis dissecans of the talus
- Avascular necrosis of a tarsal bone
- Avascular necrosis of the tarsal navicular
Tumors
Masses that favor the foot, and muscle that mimics a mass
- Tumors that favor the foot and ankle
- Giant cell tumor of tendon sheath on MRI
- Giant cell tumor of tendon sheath
- Calcaneal tumor differential
- Tarsal tunnel syndrome
- Tarsal tunnel: what MRI adds
- Ganglion causing tarsal tunnel syndrome
- Anomalous muscles mimic tumors
- Anomalous muscle (peroneus quartus)
Ligaments
The lateral complex bears over 90% of ankle sprains
- MRI and acute ligament injury
- Deltoid ligament
- Lateral ligament complex: two groups
- Lateral collateral ligaments: tibiofibular group
- Lateral collateral ligaments: talofibular and calcaneofibular group
- Anterior talofibular ligament injury
- Anterior talofibular ligament
- Conditions linked to chronic lateral tears
- Sinus tarsi syndrome
- Sinus tarsi syndrome
- Anterolateral impingement syndrome
- Anterolateral impingement syndrome
Bony Abnormalities
Coalition, stress fracture, and osteomyelitis
- Tarsal coalition
- Tarsal coalition
- Stress fractures on MRI
- Calcaneal stress fracture
- Osteomyelitis in the diabetic foot
- Takeaways for reading foot and ankle MRI
- Five areas, five quick reads
- Suggested Readings
- Suggested Readings
- Brant and Helms' Fundamentals of Diagnostic Radiology