Enhancing Recognition of Allergic Contact Dermatitis in Skin of Color: A 3D Imaging Approach.

Patch testing, a key diagnostic tool for allergic contact dermatitis, relies heavily on visual assessment of erythema, which is not as prominent or presents differently in skin of color. To address this challenge, we used a 3D camera and image processing software to analyze patch test reaction grades in skin of color patients. Here, we present topographic photographs and videos for doubtful, 1+, 2+, 3+, and irritant reactions to highlight the infiltration and edema through measurements of relative height and texture changes. By leveraging this technology, we hope to aid dermatologists in better differentiating between patch test reaction grades and further refine diagnostic criteria to include more objective measurements, minimizing reliance on erythema.