PETRA
Pedal Elevated Temperature Risk Assessment
AI-powered diabetic foot screening tool to predict diabetic foot ulcers
A new standard for diabetic foot prevention
PETRA (Pedal Elevated Temperature Risk Assessment) is a smartphone-based medical device and AI platform designed to predict diabetic foot ulcers before they present.
By analyzing temperature asymmetries between a patient’s left and right foot, PETRA detects early inflammatory changes that precede skin breakdown — enabling clinicians to intervene early and avoid amputations.
Built for routine clinics
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Evidence based technology
PETRA is based on the validated biomarker— a ≥2.2°C temperature asymetry between left and right foot regions strongly predicts ulceration.
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Designed for low-resource settings
Works with affordable thermal cameras, minimal calibration, and simple workflows — making advanced screening possible anywhere in under one minute.
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AI that clinicians can trust
PETRA segments only the true foot tissue from background noise, producing explainable, realiable heat maps of relative temperature asymmetries between the feet where one conteralateral area acts as the control.
Early detection without expensive equipment
PETRA brings hospital-grade thermal screening to any clinic using only a smartphone and AI.
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Unique Value Proposition 1
No calibration or manual measurement required — PETRA automatically computes clinically meaningful asymmetry.
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Unique Value Proposition 2
Designed for both screening and longitudinal monitoring of high-risk patients.
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Unique Value Proposition 3
Works across populations, skin tones, and environments — not just controlled labs.
Built with clinicians-in-loop AI
Clinically validated threshold
PETRA is built on published medical research showing that a ≥2.2°C temperature difference between left and right feet is one of the strongest predictors of diabetic foot ulcer formation.
Real patient data
PETRA’s AI is trained on real diabetic foot images collected from clinics in India and the United States—not synthetic or lab-only datasets—with continuous feedback from clinical practitioners (clinicians-in-loop).
Global clinical partnerships
PETRA is being developed in collaboration with hospitals, diabetic foot specialists, and research partners across India, and the U.S.