Division of Pediatric Surgery/Department of Surgery, University of Colorado School of Medicine, Children's Hospital Colorado, Colorado Springs, Colorado.
Baylor University Medical Center, Dallas, Texas.
J Surg Res. 2019 Jan;233:376-380. doi: 10.1016/j.jss.2018.08.017. Epub 2018 Sep 10.
To avoid the radiation exposure of CT imaging and the expense of CT or MRI studies, we sought to develop a non-radiographic severity measurement of pectus excavatum based on 3D photogrammetric imaging.
Over 28 mo, ten consecutive patient volunteers with pectus excavatum underwent 3D stereophotogrammetric imaging. The surface width to surface depth ratio (Surface Lengths Pectus Index), the chest deformity's surface area to total chest surface area (Pectus Surface Area Ratio), and the chest deformity's volume to total chest volume (Pectus Volume Ratio) were calculated. Simple linear regression analysis compared the Surface Lengths Pectus Index, Pectus Surface Area Ratio, and Pectus Volume Ratio calculations each to the corresponding known CT pectus index.
The correlation between CT pectus index versus Surface Lengths Pectus Index yielded an R-squared value of 0.7637 and a P value of 0.0013. A CT pectus index of 3.4 or greater (eight patients) corresponded to a Surface Lengths Pectus Index of 1.86 or greater (six patients). The CT pectus index versus Pectus Surface Area Ratio (R-squared = 0.4627, P = 0.0305) and the CT pectus index versus the Pectus Volume Ratio (R-squared = 0.3048, P = 0.0990) demonstrated less correlation.
Surface Lengths Pectus Index corresponds to the CT pectus index and may be adequate to determine severity of pectus excavatum in some patients.
为了避免 CT 成像的辐射暴露和 CT 或 MRI 检查的费用，我们试图开发一种基于 3D 摄影测量成像的非放射性漏斗胸严重程度测量方法。
在 28 个月的时间里，连续 10 名漏斗胸患者志愿者接受了 3D 立体摄影测量成像。计算了表面宽度与表面深度比（表面长度漏斗胸指数）、胸部畸形表面积与总胸部表面积比（漏斗胸表面积比）和胸部畸形体积与总胸部体积比（漏斗胸体积比）。简单线性回归分析比较了 Surface Lengths Pectus Index、Pectus Surface Area Ratio 和 Pectus Volume Ratio 计算值与相应的已知 CT 漏斗胸指数。
CT 漏斗胸指数与 Surface Lengths Pectus Index 之间的相关性得出的 R 平方值为 0.7637，P 值为 0.0013。CT 漏斗胸指数为 3.4 或更高（8 名患者）对应于 Surface Lengths Pectus Index 为 1.86 或更高（6 名患者）。CT 漏斗胸指数与 Pectus Surface Area Ratio（R 平方值=0.4627，P=0.0305）和 CT 漏斗胸指数与 Pectus Volume Ratio（R 平方值=0.3048，P=0.0990）之间的相关性较小。
Surface Lengths Pectus Index 与 CT 漏斗胸指数相对应，可能足以确定某些患者漏斗胸的严重程度。
