Becker François, Fourgeau Patrice, Carpentier Patrick H, Ouchène Amina
1 Division of Angiology and Haemostasis, Geneva University Hospital, Switzerland.
2 Laboratoires Innothéra, Arcueil, France.
Phlebology. 2018 Jun;33(5):309-314. doi: 10.1177/0268355517703840. Epub 2017 Apr 12.
We postulate that blue telangiectasia and brownish pigmentation at ankle level, early markers of chronic venous insufficiency, can be quantified for longitudinal studies of chronic venous disease in Caucasian people. Objectives and methods To describe a photographic technique specially developed for this purpose. The pictures were acquired using a dedicated photo stand to position the foot in a reproducible way, with a normalized lighting and acquisition protocol. The image analysis was performed with a tool developed using algorithms optimized to detect and quantify blue telangiectasia and brownish pigmentation and their relative surface in the region of interest. To test the short-term reproducibility of the measures. Results The quantification of the blue telangiectasia and of the brownish pigmentation using an automated digital photo analysis is feasible. The short-term reproducibility is good for blue telangiectasia quantification. It is a less accurate for the brownish pigmentation. Conclusion The blue telangiectasia of the corona phlebectatica and the ankle flare can be assessed using a clinimetric approach based on the automated digital photo analysis.
我们推测，作为慢性静脉功能不全早期标志的脚踝部蓝色毛细血管扩张和褐色色素沉着，可用于白种人慢性静脉疾病的纵向研究量化。目的与方法 描述为此专门开发的一种摄影技术。使用专用摄影架以可重复方式摆放足部来获取图片，并采用标准化照明和采集方案。使用通过优化算法开发的工具进行图像分析，以检测和量化感兴趣区域内的蓝色毛细血管扩张、褐色色素沉着及其相对面积。测试这些测量的短期可重复性。结果 使用自动数字照片分析对蓝色毛细血管扩张和褐色色素沉着进行量化是可行的。蓝色毛细血管扩张量化的短期可重复性良好。褐色色素沉着量化的准确性稍低。结论 基于自动数字照片分析的临床测量方法可用于评估静脉扩张环和脚踝部潮红处的蓝色毛细血管扩张。
