Textural Analysis and Effect of ROI Size on Infrared Thermography in Athletes With Patellar Tendinopathy

The IT images were recorded with an OPTRIS PI 450 IRT camera coupled to Optris PI Connect Software (Germany). The IRT camera has a Noise Equivalent Temperature Difference \<40 mK with 38º x 29º FOV, a wide range of temperature from -20°C to +100°C, spectrum range of 7.5-13 μm, focal plane array sensor size of 382 × 288 pixels, emissivity set at 0.98 and a measurement uncertainty of ± 2% of the overall temperature reading. The size of the capture frame will be 55.4 × 40.63 cm (1.5 mm/px).