Miyake Keisuke
Plastic Surgery, Saiseikai Matsuyama Hospital, Matsuyama, Japan.
J Plast Reconstr Surg. 2023 Sep 8;3(1):34-38. doi: 10.53045/jprs.2022-0051. eCollection 2024 Jan 27.
Photogrammetry is a method of producing three-dimensional (3D) data from multiple photographs and videos. The purpose of this study was to evaluate the reliability of 3D hand models constructed using photogrammetry.
The angles of the distal (DIP) and proximal (PIP) interphalangeal joints of the author's index finger were measured using a protractor goniometer. Five different blocks were used to stabilize the angles of the fingers. We collected 50 photographs and one video. Digital 3D models of the hand were constructed using 3DF Zephyr photogrammetry software. The angles of the DIP and PIP joints of the model were measured in virtual space. The angles obtained via the two methods were subjected to correlation analysis.
Eighty values (40 joints of 20 fingers; goniometer/3D model) were obtained. The maximum value obtained was 84° and the minimum was 33°. The average time required to take the original photographs of the model was 3 minutes, and that for the videos was 51 seconds. The average time required to construct a 3D image was 12 minutes. The greatest difference between the methods was 9° and the mean difference was 0.2°. The intraclass correlation coefficient (2,1) was 0.971.
A high level of agreement was found between these angles. A 3D hand model constructed using photogrammetry is reproducible.
摄影测量法是一种从多张照片和视频中生成三维（3D）数据的方法。本研究的目的是评估使用摄影测量法构建的3D手部模型的可靠性。
使用量角器测角仪测量作者食指的远端指间关节（DIP）和近端指间关节（PIP）的角度。使用五个不同的木块来固定手指的角度。我们收集了50张照片和一段视频。使用3DF Zephyr摄影测量软件构建手部的数字3D模型。在虚拟空间中测量模型的DIP和PIP关节的角度。对通过两种方法获得的角度进行相关性分析。
获得了80个值（20根手指的40个关节；测角仪/3D模型）。获得的最大值为84°，最小值为33°。拍摄模型原始照片的平均时间为3分钟，拍摄视频的平均时间为51秒。构建3D图像的平均时间为12分钟。两种方法之间的最大差异为9°，平均差异为0.2°。组内相关系数（2,1）为0.971。
发现这些角度之间具有高度一致性。使用摄影测量法构建的3D手部模型具有可重复性。
