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AI-powered tarsal tunnel syndrome detection on ankle MRI. Identify tibial nerve compression, space-occupying lesions, and tendon abnormalities. 4 AI models analyze nerve and soft tissue pathology in parallel.
Tarsal tunnel syndrome is a compressive neuropathy of the tibial nerve or its branches as they pass through the tarsal tunnel beneath the flexor retinaculum on the medial ankle. The tarsal tunnel contains the tibial nerve, posterior tibial artery and veins, and the tendons of tibialis posterior, flexor digitorum longus, and flexor hallucis longus. Compression can result from space-occupying lesions such as ganglion cysts, varicosities, accessory muscles, or lipomas, as well as from post-traumatic fibrosis, tenosynovitis, or hindfoot valgus deformity. MRI is valuable for identifying structural causes of nerve compression and evaluating nerve morphology. Our AI consortium assesses the tarsal tunnel contents, nerve caliber changes, and any mass lesions that may be contributing to symptoms.
MRI is essential when clinical examination and nerve conduction studies are inconclusive or when a space-occupying lesion is suspected. Axial T1 and T2-FS sequences through the tarsal tunnel evaluate the posterior tibial nerve, medial and lateral plantar nerve divisions, and the contents of the flexor retinaculum tunnel. Common MRI findings include ganglion cyst (high T2, well-defined), lipoma (T1 hyperintense), varicose veins (serpiginous T2-bright structures), or accessory muscles (isointense to muscle on all sequences) compressing the nerve. Neural signal change — T2 hyperintensity within the posterior tibial nerve — indicates intrinsic nerve injury.
AI models can measure posterior tibial nerve cross-sectional area at multiple tarsal tunnel levels on axial MRI and compare it to normative datasets, detecting focal nerve enlargement (>7–8 mm²) that indicates entrapment neuropathy. Asymmetric T2 signal within the nerve, combined with volumetric measurement of space-occupying lesions, provides objective diagnostic criteria. Additionally, AI can simultaneously assess for concurrent PTT dysfunction, accessory soleus, or talocalcaneal coalition — conditions that alter tarsal tunnel anatomy and can mimic or co-contribute to nerve compression.
Plantar fasciitis manifests as plantar heel pain with maximum tenderness at the calcaneal insertion of the fascia, typically worst with first steps in the morning. MRI shows plantar fascia thickening (>4 mm), perifascicular edema, and calcaneal enthesopathy on sagittal STIR. Tarsal tunnel syndrome produces burning medial ankle and plantar paresthesias with a positive Tinel sign and no morning stiffness pattern. When MRI demonstrates both plantar fascia thickening and a tarsal tunnel space-occupying lesion, AI analysis systematically identifies each pathology and prevents misattribution of symptoms that would lead to targeted but ineffective intervention.
Upload your MRI or X-ray DICOM files for private, AI-powered analysis. 4 models analyze independently — all data stays in your browser.
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