Comparing the accuracy of thermal imaging and infrared thermometers for foot temperature measurement at varying distances: a repeated measurement study.

Abstract

Background The use of thermal imaging in podiatry for the early detection of conditions like diabetic foot ulcers is increasing. It is a non-invasive technology critical to identifying the inflammation that can indicate potential ulcers.

Methods A quantitative cohort study with repeated measurements was carried out on twelve participants to assess the relative accuracy at varying distances of two technologies: HIKMICRO thermal cameras (HTC) and non-contact infrared thermometers (NCIT). Both devices were used to take measurements at specific distances, and the data were analysed for repeated iterations to increase validity.

Results The study found that there were no significant differences, for either device, in the temperature readings at any of the distances tested, which demonstrates consistent performance. Based on these results, both HTC and NCIT devices can be recommended for routine podiatric clinical assessments.

Conclusion Both HTC and NCIT give reliable measurements of foot temperature, which means that they are appropriate for managing and early diagnosing foot conditions in podiatric settings. However, further research is needed to refine this study's findings and develop standard protocols appropriate to their clinical use.