Video-based digital biomarkers for Neurogenic Thoracic Outlet Syndrome

nTOS turns an ordinary webcam recording of the Press Test into objective, quantitative measures of upper-extremity function, with no wearable sensors required, so patients can be assessed and monitored remotely over telemedicine.

What this project does

Neurogenic Thoracic Outlet Syndrome compresses the brachial plexus and causes arm pain, numbness, and weakness that worsen with hand-over-head activity. It is hard to diagnose objectively and hard to monitor over time.

During the 20-second Press Test the patient repeatedly raises and lowers the arms. Our AI pose model tracks the shoulder angle frame-by-frame and extracts digital biomarkers of five motor phenotypes:

slowness · weakness · rigidity · exhaustion · unsteadiness

Project goal

Prove that these remotely-measured biomarkers match validated wearable sensors, distinguish nTOS from mimicking conditions, and track recovery after therapy or surgery, including at-home follow-ups.

Demo: AI tracking

The overlay shows the tracked skeleton and the live shoulder angle used to build the biomarker signal.

Standard Operating Procedure (SOP)

The SOP describes exactly how to record a valid Press Test video (camera position, distance, lighting, patient framing, and the movement itself). Follow it before recording so the analysis is reliable.

Download SOP (PDF) Coming soon

The SOP is not published yet. This button activates automatically once the document is added to static/sop/nTOS_SOP.pdf. No code change needed.