Pavlovčič Urban, Diaci Janez, Možina Janez, Jezeršek Matija
University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000, Ljubljana, Slovenia.
Biomed Eng Online. 2015 Apr 24;14:39. doi: 10.1186/s12938-015-0031-7.
Wound measuring serves medical personnel as a tool to assess the effectiveness of a therapy and predict its outcome. Clinically used methods vary from measuring using rules and calipers to sophisticated methods, based on 3D measuring. Our method combines the added value of 3D measuring and well-known segmentation algorithms to enable volume calculation and achieve reliable and operator-independent analysis, as we demonstrate in the paper.
Developed 3D measuring system is based on laser triangulation with simultaneous color acquisition. Wound shape analysis is based on the edge-determination, virtual healthy skin approximation over the wound and perimeter, area, and volume calculation. In order to validate the approach, eight operators analyzed four different wounds using proposed method. Measuring bias was assessed by comparing measured values with expected values on an artificially modeled set of wounds.
Results indicate that the perimeter, area, and volume are measured with a repeatability of 2.5 mm, 12 mm(2), and 30 mm(3), respectively, and with a measuring bias of -0.2 mm, -8.6 mm(2), 24 mm(3), respectively.
According to the results of verification and the fact that typical wound analysis takes 20 seconds, the method for wound shape measurement can be clinically used as a precise tool for objectively monitoring the wound healing based on measuring its 3D shape and color.
伤口测量为医务人员提供了一种评估治疗效果并预测其结果的工具。临床使用的方法多种多样，从使用尺子和卡尺测量到基于三维测量的复杂方法。正如我们在本文中所展示的，我们的方法结合了三维测量的附加值和知名的分割算法，以实现体积计算并获得可靠且独立于操作人员的分析结果。
所开发的三维测量系统基于激光三角测量法并同时采集颜色信息。伤口形状分析基于边缘确定、伤口上方虚拟健康皮肤近似以及周长、面积和体积计算。为了验证该方法，八名操作人员使用所提出的方法对四个不同的伤口进行了分析。通过将测量值与人工建模的伤口组上的预期值进行比较来评估测量偏差。
结果表明，周长、面积和体积测量的重复性分别为2.5毫米、12平方毫米和30立方毫米，测量偏差分别为-0.2毫米、-8.6平方毫米、24立方毫米。
根据验证结果以及典型伤口分析耗时20秒这一事实，伤口形状测量方法可在临床上用作一种精确工具，通过测量伤口的三维形状和颜色来客观监测伤口愈合情况。
