Follicular Map: A Novel Approach to Quantitative Trichoscopy

Skin Appendage Disorders
Michal KasprzakAntonella Tosti

Abstract

Trichoscopy (hair and scalp dermoscopy) is gaining importance as an easy-to-use diagnostic and monitoring tool in various hair and scalp conditions. The demand for a method to identify exactly the same site on scalp skin for subsequent examinations is growing constantly. In total, 40,000 trichoscopic images of 70-fold magnification were analyzed. Graphical pattern recognition was used to identify hair shafts in trichoscopy images and to derive the coordinates of all follicular orifices. Determination of the relative positions of hair follicle orifices formed the Follicular Map (FMap). Processing and matching of FMaps involves conceptually simple but computationally complex numerical algorithms. FMaps were shown to be unique for specific locations on the scalp in each human individual. The follicular patterns were not affected by natural hair cycling processes and remained unchanged over the course of time. It has been tentatively verified that FMaps remain unaffected by noncicatricial alopecia. The concept of FMap presents a novel approach to qualitative trichoscopy, allowing precise evaluation of treatment efficiency, clinical trial quality control, validation of diagnostic tools, and potentially other applications still to be...Continue Reading

References

Oct 21, 2006·Journal of the American Academy of Dermatology·Elizabeth K RossAntonella Tosti
Dec 19, 2006·Proceedings of the National Academy of Sciences of the United States of America·Yanshu WangJeremy Nathans
Jan 16, 2007·Cell·Jaroslav StarkSarah E Millar
Jan 26, 2010·Actas dermo-sifiliográficas·A Tosti, F Torres
Aug 28, 2010·The British Journal of Dermatology·U Blume-PeytaviUNKNOWN European Consensus Group
Jul 1, 2009·International Journal of Trichology·Adriana RakowskaLidia Rudnicka
Dec 18, 2015·Journal of the European Academy of Dermatology and Venereology : JEADV·M HarriesR Paus
Apr 21, 2017·Journal of the European Academy of Dermatology and Venereology : JEADV·O M Moreno-ArronesS Vañó-Galván

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