Modified Allen Test Assessment via Imaging Photoplethysmography

Abstract The modified Allen test (MAT) is a widely used tool to examine the perfusion capacities of arteries (ulnar or radial) hand. In clinical practice, MAT utilized ensure that in event occlusion, remaining vessels guarantee sufficient hand perfusion. This work shows assessment via imaging photoplethysmography (iPPG) can be assess MAT. We captured hands seven subjects with standard RGB camera while performing Out these video recordings, iPPG signal was extracted plane-orthogonal-to-skin transformation. Based on signals, we derive heart rate, signal-to-noise ratio, DC parameter, and correlation reference determine if an pathological inconspicuous. For all subjects, results our were identical medical expert’s assessment. paper presents procedure initial thresholds for objectively evaluating quantifying MAT.We show how globally locally calculated parameters investigated analysis makes it possible quantify exact point time when again sufficient. If reperfusion problem occurs, are able localize spatial regions occurrence. presented hardware setup affordable easily installed every doctor’s office.