Hameeteman Marijn, Verhulst Arico C, Maal Thomas J J, Ulrich Dietmar J O
Department of Plastic, Reconstructive and Hand Surgery, Radboud University Nijmegen, Medical Centre, Nijmegen, The Netherlands.
Department of Plastic, Reconstructive and Hand Surgery, Radboud University Nijmegen, Medical Centre, Nijmegen, The Netherlands; Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen, Medical Centre, Nijmegen, The Netherlands.
J Plast Reconstr Aesthet Surg. 2016 Dec;69(12):1609-1613. doi: 10.1016/j.bjps.2016.08.010. Epub 2016 Sep 17.
Volume of the breast can be objectively measured by three-dimensional (3D) photographs. This study describes the analysis of three different positions of the patient in image acquisition, in order to find the best pose for reproducible 3D photographs of the breasts.
Twenty-four patients were included between February and September 2014 in a consecutive way. Data were collected prospectively. 3D photographs were acquired using a stereophotogrammetry system. Images were taken twice in three different positions (arms behind the back, arms placed on the hips and arms horizontally placed). Surface based matching was applied and the absolute mean distance between the surfaces of both 3D models of the same position was calculated. This difference measure represents the similarity of the photographs.
Univariate ANOVA showed a significant difference in distance between the three positions (sum of squares 1.12, p < 0.001). The horizontal position presented the lowest absolute mean distance (0.45 mm). Additional post hoc multiple comparisons analysis revealed a statistically significant difference between the distances of horizontal and back position (-0.22 mm, p < 0.001) and of back and hip position (0.13 mm, p = 0.009), with better results of the horizontal and hip positions, respectively.
Standardization of 3D acquisition in pre- and postoperative breast imaging could improve imaging reproducibility. Based on the results of this study, we recommend a pose with the arms in a horizontal position.
乳房体积可通过三维（3D）照片进行客观测量。本研究描述了对患者在图像采集时的三种不同姿势进行分析，以找到用于获取可重复的乳房3D照片的最佳姿势。
2014年2月至9月连续纳入24例患者。前瞻性收集数据。使用立体摄影测量系统获取3D照片。在三个不同姿势（双臂背后、双臂放于臀部、双臂水平放置）下各拍摄两次图像。应用基于表面的匹配方法，并计算同一姿势下两个3D模型表面之间的绝对平均距离。该差异度量代表照片的相似度。
单因素方差分析显示三个姿势之间的距离存在显著差异（平方和1.12，p < 0.001）。水平姿势的绝对平均距离最低（0.45毫米）。额外的事后多重比较分析显示水平姿势与背后姿势之间的距离有统计学显著差异（-0.22毫米，p < 0.001），背后姿势与臀部姿势之间的距离也有统计学显著差异（0.13毫米，p = 0.009），水平姿势和臀部姿势的结果分别更好。
术前和术后乳房成像中3D采集的标准化可提高成像的可重复性。基于本研究结果，我们推荐双臂水平放置的姿势。
