Scalp Imaging Techniques

The document from March 27, 2017, reviews various scalp imaging techniques and their applications in diagnosing and tracking hair and scalp disorders, as well as in clinical research. It presents two studies: the first study used phototrichograms and laser scanning microscopy to measure hair density and follicular parameters in 6 Caucasian and 6 Asian volunteers, finding an average terminal hair density of 132 hairs per cm² and 135 hairs per cm², respectively. The second study used cyanoacrylate surface replicas and light microscopy, also combined with laser scanning microscopy, to measure hair density and follicular orifice size in 6 healthy male Caucasian volunteers, with hair densities ranging from 112–143 hairs cm². The document highlights the importance of these techniques in understanding drug delivery and toxicology related to the scalp and hair, and suggests that a combination of methods and a larger number of volunteers are needed for a more comprehensive assessment.