A Modified Sobel Filter-Based Automated Numerical Algorithm Enables Immediate Trichoscopic Assessment of Hair Diameter Diversity in Male and Female Pattern Hair Loss

Trichoscopy and pathological examination both have unique benefits and cannot completely replace each other in evaluating hair.

The article simplifies trichoscopy terms and offers a new diagnostic flowchart.

Alopecia areata is likely an autoimmune disease with unclear triggers, involving various immune cells and molecules, and currently has no cure.

Finasteride helps hair loss patients' quality of life.

TrichoScan® is a reliable tool for measuring hair growth, providing quicker and more consistent results than manual methods.

Phototrichogram and hair diameter measurements are effective, noninvasive ways to assess hair growth and detect early hair loss, with the most common pattern being reduced hair density.

FPHL affects hair density and diameter, causing visible hair loss in older women.