Application of Imaging Methods in Identification of Morphometric Parameters of Hair Growth

Abstract: Each hair goes through three phases of growth: anagen, a phase of full activity, catagen-involution and telogen-rest. These cycles follow rhythmically. Hair growth on the hairy scalp is influenced by many factors such as age, diet, care. The study included detailed analysis of imaging methods: ultrasonography, clinical photography and microscopic examination to determine the growth rate, consistency and thickness of hair. Materials and Methods: 12 volunteers applied the herbal preparation for hair growth. Some of the hair was shaved, the preparation was rubbed for 7 weeks and then the hair was removed for testing. High frequency ultrasonography (33 MHz) was used for imaging of the hair follicle and parts of the hair shaft beneath the surface of the skin. Clinical photography allowed the acquisition of high-resolution images in the light of cross-polarized region of interest, which was further analyzed using image analysis and processing methods. Microscopic examinations allowed for the evaluation of hair microstructure and analysis of hair follicles – identification of the growth phase. For testing, the hair was pulled with tweezers and then fixed. Applied methods enable quantification of hair growth. Microscopic examination allows to determine the growth phase of the hair and its thickness. The best way to assess hair consistency is to use a clinical photograph supported by image analysis. An ultrasound scan is good for watching hair follicles.

Authors:

Wiktoria Odrzywołek, Julita Zdrada

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