Van Neste D J J
Skinterface, Tournai, Belgium.
Brussels' Hair Clinic, Brussels, Belgium.
Skin Res Technol. 2015 Aug;21(3):373-9. doi: 10.1111/srt.12207. Epub 2015 Jan 13.
To compare two measurement methods for body hair.
Calibration of computer assisted image analysis after manual processing (CAIAMP) showed variation <4% for thickness and <2.3% for densities. Images from 6 body sites with 'good natural contrast between hair and skin' were taken before hair dye, after hair dye or after hair length reduction without hair extraction or destruction. Data in the same targets were compared with Trichoscan(™) quoted for 'unambiguous evaluation of the hair growth after shaving'.
CAIAMP detected a total of 337 hair and showed no statistically significant differences with the three procedures confirming 'good natural contrast between hair and skin' and that reduction methods did not affect hair counts. While CAIAMP found a mean number of 19 thick hair (≥30 μm) before dye, 18 after dye and 20 after hair reduction, Trichoscan(™) found in the same sites respectively 44, 73 and 61. Trichoscan(™) generated counts differed statistically significantly from CAIAMP-data. Automated analyses were considered un-specifically influenced by hair medulla and natural or artificial skin background.
Quality control including all steps of human intervention and measurement technology are mandatory for body hair measurements during experimental or clinical trials on body hair grooming, shaving or removal.
比较两种体毛测量方法。
手动处理后计算机辅助图像分析（CAIAMP）的校准显示，厚度变化<4%，密度变化<2.3%。在染发前、染发后或头发长度减少后（不进行毛发拔除或破坏），采集6个“毛发与皮肤之间具有良好自然对比度”身体部位的图像。将同一目标的数据与Trichoscan(™)进行比较，Trichoscan(™)用于“明确评估剃须后的头发生长情况”。
CAIAMP共检测到337根毛发，与确认“毛发与皮肤之间具有良好自然对比度”的三个程序相比，无统计学显著差异，且减少方法不影响毛发计数。虽然CAIAMP发现在染发前平均有19根粗毛发（≥30μm），染发后为18根，头发减少后为20根，但Trichoscan(™)在相同部位分别发现44根、73根和61根。Trichoscan(™)生成的计数与CAIAMP数据在统计学上有显著差异。自动分析被认为非特异性地受到毛发髓质以及自然或人工皮肤背景的影响。
在进行关于体毛修饰、剃须或去除的实验或临床试验期间，对体毛测量而言，包括所有人工干预和测量技术步骤的质量控制是必不可少的。
