Spatial Statistics Applied to Raynaud's Phenomenon
| Main Authors: | F. Esmanhoto, Eduardo, L. Ripka, Wagner, Campos, Daniel, P. Coninck, José Carlos, Ulbricht, Leandra |
|---|---|
| Format: | Proceeding eJournal |
| Bahasa: | por |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3458051 |
Daftar Isi:
- In 1862, Maurice Raynaud described what is now known as the Raynaud’s Phenomenon (RP), characterized by episodes of vasospasms of the extremities, associated with typical color changes in patients exposed to cold. There are two forms of the syndrome: the primary Raynaud tends to present lighter symptoms, while secondary Raynaud might include necrosis, ulceration and gangrene, making it worth while the pursuit of differentiating these forms in advance. The purpose of this work was to apply variogram models through geostatistical analysis in thermographic images in order to analyze the heat diffusion patterns to better comprehend this disease and aid at its diagnose. We observed that the most frequent distribution models are the Gaussian, Exponential and k-Bessel models, due to the properties of the correlations of spatial thermal distributions in thermographic images. The Bessel model is present in 44% of cases of RP1, 70% of cases of RP2 and in 38% of healthy cases. The Gaussian model is found in 40% of RP1, 12% of RP2 and 10% of the Healthy group. The exponential model was most frequently verified in healthy subjects with 32%, while in cases RP1with 12% and RP2 with 8%. Other models appear in smaller percentages in all groups, with special attention to some models that adjusted only to the healthy individuals, such as the Circular and the Logarithmic models. These adjusted models provide great knowledge regarding the heat diffusion patterns present in individuals with Raynaud’s Phenomenon, aiding in the differentiation when compared to healthy individuals. Moreover, although the models alone cannot yet distinguish the primary form from the secondary form of the syndrome, it points future studies to viable directions to attain it.
- XII SIMPÓSIO DE ENGENHARIA BIOMÉDICA - IX SIMPÓSIO DE INSTRUMENTAÇÃO E IMAGENS MÉDICAS