Thermography for the differential diagnosis of vascular malformations
This dataset contains thermographic and classic imaging modalities (Doppler ultrasonography and magnetic resonance) of low- and high-flow vascular malformations. In the file supplement_1, there is a comparative between alike low- and high-flow malformations in visible and the infrared band. Arrows indicate the exact localization of the malformation. Pictures on the top row correspond to a high-flow arteriovenous malformation and snapshots on the bottom row to a low-flow capillary malformation. In the visible spectrum, both malformations are quite similar and the diagnosis by simple visual inspection is challenging. However, thermal images are quite different. In the case of the high-flow malformation, there are high temperature variations in the hand (up to 1ºC). Moreover, the hemodynamic flow between both hands is completely different. The malformation creates an asymmetry on the bloods distribution. For the low-flow malformation, temperature variations are much less intense (lower than 0.3ºC). The hemodynamic flow between both hands is more homogeneous. Likewise, in file supplement_2 there is a similar comparative analysis between high- and low-flow malformations in the back. Images in the top row correspond to a high-flow arteriovenous malformation and images on the bottom row correspond to a low-flow one. Again, thermal images display remarkable temperature variations for the high-flow malformation and a more homogeneous temperature distribution for the low-flow malformation. In file supplement_3, we provide for the two previous high-flow arteriovenous malformations thermal images among other classic imaging modalities, i.e. Doppler ecography and magnetic resonance. Thermal images provide complementary information about temperature that can be crucial for an early classification of the malformation. In file supplement_4, there are snapshots of the custom imaging system developed for this research work. It has two cameras that operate simultaneously. One operates in the visible spectrum and the other one in the infrared band. The second camera can measure absolute temperature values after calibration. A LCD display is available to visualize data from the sensors.