Department of Dermatology, Poznan University of Medical Sciences, Poznan, Poland.
Department of Skin Diseases, Provincial Hospital in Poznan, Poznan, Poland.
Skin Res Technol. 2021 Mar;27(2):201-207. doi: 10.1111/srt.12930. Epub 2020 Jul 20.
Hair loss is a common problem in dermatological patients. Its diagnosis is based on selected non-invasive and invasive tests. Searching for new diagnostic methods, especially non-invasive ones, aims to accelerate the correct diagnosis in the least invasive way possible. The aim of our study was to establish the characteristics of ultrasound images in healthy individuals and to compare them to selected trichoscopic parameters.
Eighteen healthy adults (10 women and 8 men) underwent trichoscopy and high-frequency ultrasound (HF-USG) with 20 MHz DermaScan transducer on the parietal region of the scalp. Selected parameters were compared in relation to sex and the research method used.
HF-USG of the parietal area in all examined patients revealed hyperechogenic entrance echo and less echogenic layer corresponding to the dermis with well-defined hypoechoic follicular structures (FS). The number of hair units in trichoscopy and the number of FS in HF-USG did not differ significantly, while the differences in the studied distances between structures were statistically significant. The width of FS in HF-USG was significantly higher than hair shafts thickness in trichoscopy.
HF-USG (20MHz) due to the possibility of visualization of FS can be a valuable complement to the range of non-invasive diagnostic procedures used in evaluation of the scalp.
脱发是皮肤科患者常见的问题。其诊断基于选择的非侵入性和侵入性测试。寻找新的诊断方法，特别是非侵入性方法，旨在以尽可能微创的方式加速正确诊断。我们的研究目的是确定健康个体的超声图像特征，并将其与选定的毛发镜参数进行比较。
18 名健康成年人（10 名女性和 8 名男性）在前头部头皮区域接受毛发镜检查和 20MHz DermaScan 换能器的高频超声（HF-USG）检查。比较了与性别和研究方法相关的选定参数。
所有接受检查的患者的高频超声头皮区域均显示出强回声入口回声和真皮回声较弱的层，具有定义明确的低回声毛囊结构（FS）。毛发镜检查中的毛发单位数量和 HF-USG 中的 FS 数量没有显著差异，而研究中结构之间的距离差异具有统计学意义。HF-USG 中 FS 的宽度明显高于毛发镜检查中的毛发轴厚度。
由于 FS 的可视化，HF-USG（20MHz）可以成为评估头皮时使用的非侵入性诊断程序的有价值的补充。
