The skin hyperpigmentation index: An objective method of measuring the intensity of hyperpigmentation after sclerotherapy.

Bossart, Simon; Willenberg, Torsten; Ramelet, Albert-Adrien; Cazzaniga, Simone; Hunger, Robert; Jafari, S Morteza Seyed (2020). The skin hyperpigmentation index: An objective method of measuring the intensity of hyperpigmentation after sclerotherapy. Phlebology, 35(10), pp. 833-835. Sage 10.1177/0268355520941359

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Skin hyperpigmentation in chronic venous insufficiency and as a side effect in vein treatments are of great importance for the affected individuals. There are only a few qualitatively limited methods that allow its quantification. Previous techniques to develop a reliable scientific approach to quantification have failed due to the lack of standardized conditions including differences in lighting, distances and equipment. A newly developed measuring method, the "skin hyperpigmentation index", enables a fully automated and standardized quantification of skin hyperpigmentation with dermatoscopic images. The skin hyperpigmentation index defines the ratio of two scores, namely hyperpigmented skin of the affected area and normal sun protected skin from the same patient. This results in a range from 1 (no pigmentation) to 4 (maximum pigmentation). For a practical evaluation of the score, a free skin hyperpigmentation index calculator can be used online, which is accessible to all practitioners (https://shi.skinimageanalysis.com/). The skin hyperpigmentation index is a fully automated method for the quantitative assessment of skin pigmentation which can easily be applied to any skin type with any type of hyperpigmentation. This allows a simple, fast, and standardized quantification of skin hyperpigmentation and is useful for monitoring the progress and planning of whitening therapy.

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