Wesselius Tycho S, Verhulst Arico C, Vreeken Rinaldo D, Xi Tong, Maal Thomas J J, Ulrich Dietmar J O
From the Department of Plastic, Reconstructive-, and Hand Surgery; and the Department of Oral and Maxillofacial Surgery; and 3D Lab Radboudumc, Radboud University Medical Center.
Plast Reconstr Surg. 2018 Oct;142(4):858-865. doi: 10.1097/PRS.0000000000004728.
Knowing breast volumes before certain surgeries helps the surgeon to obtain breast symmetry. Calculating breast volumes from three-dimensional surface images is possible with specialized software applications. However, limited data exist concerning the accuracy of such volume calculations. The purpose of this study was to investigate the accuracy of breast volume calculations performed with the 3D BreAST, 3dMD Vultus, and VECTRA software applications.
Twenty-six subjects who underwent 44 mastectomies were enrolled. Preoperative three-dimensional surface images were acquired with a VECTRA-XT stereophotogrammetry device. Breast volumes were calculated from these images with the three software applications. The mastectomy specimens were weighed to derive their actual volume and compared with the software calculations.
For all three methods, a positive correlation between the breast volume and absolute calculation error was found (p < 0.001), but not for the errors as a percentage of the breast volume (p = 0.17, p = 0.80, and p = 0.42). The 3D BreAST, 3dMD Vultus, and VECTRA applications provided mean volume calculation errors of 21, 186, and -32 ml (p = 0.27, p < 0.001, and p = 0.14) or 2 ± 25, 48 ± 26, and -6 ± 27 percent of the breast volume (p = 0.67, p < 0.001, and p = 0.16), respectively.
Despite that two applications calculated accurate mean breast volumes, all applications showed a high standard deviation in terms of the percentage of the breast volume. Therefore, the usefulness of absolute breast volume calculations from three-dimensional surface images seems limited.
CLINICAL QUESTION/LEVEL OF EVIDENCE: Diagnostic, II.
在某些手术前了解乳房体积有助于外科医生实现乳房对称。使用专门的软件应用程序可以从三维表面图像计算乳房体积。然而，关于这种体积计算准确性的数据有限。本研究的目的是调查使用3D BreAST、3dMD Vultus和VECTRA软件应用程序进行乳房体积计算的准确性。
招募了26名接受44次乳房切除术的受试者。使用VECTRA-XT立体摄影测量设备获取术前三维表面图像。使用这三种软件应用程序从这些图像中计算乳房体积。对乳房切除标本进行称重以得出其实际体积，并与软件计算结果进行比较。
对于所有三种方法，均发现乳房体积与绝对计算误差之间存在正相关（p < 0.001），但对于误差占乳房体积的百分比则未发现（p = 0.17、p = 0.80和p = 0.42）。3D BreAST、3dMD Vultus和VECTRA应用程序的平均体积计算误差分别为21、186和-32 ml（p = 0.27、p < （此处原文有误，应该是p < 0.001）0.001和p = 0.14），或分别为乳房体积的2 ± 25%、48 ± 26%和-6 ± 27%（p = 0.67、p < 0.001和p = 0.16）。
尽管有两种应用程序计算出了准确的平均乳房体积，但所有应用程序在乳房体积百分比方面均显示出较高的标准差。因此，从三维表面图像计算绝对乳房体积的实用性似乎有限。
临床问题/证据水平：诊断性，II级。
