Craniofacial measurements based on 3D-CT volume rendering: implications for clinical applications
Craniofacial measurements based on 3D-CT volume rendering: implications for clinical applications
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DOI：
10.1259/dmfr/13603271
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发表时间：
2004-05-01
影响因子：
3.3
通讯作者：
Vannier, MW
中科院分区：
文献类型：
--
作者：
Cavalcanti, MGP;Rocha, SS;Vannier, MW
目的：本研究旨在确定颅面临床应用计算机系统三维计算机断层扫描（3D-CT）体积绘制人体测量的精度和准确性，并比较骨和软组织方案的颅骨测量标志。方法：对13具尸体头颅进行螺旋CT检查。将存档的CT数据传输到工作站，并使用计算机图形工具生成3D-CT体渲染图像。基于传统颅解剖标志（n = 08）的线性测量（n = 10），由两名放射科医生分别在2D-CT和3D-CT图像中识别两次，然后使用使用骨和软组织协议的计算机图形系统进行3D-CT成像。总共进行了520次成像测量。随后从尸体头部取出软组织，并使用电磁空间（TM）数字化仪重复测量。结果：结果显示，在两种3D-CT方案中，观察者间和观察者内测量或成像和物理测量之间无统计学差异。两种方案的标准误差均在0.45% ~ 1.44%之间，具有较高的精度。此外，影像学和物理测量之间无统计学差异（P < 0.01）。骨骼的平均实际和平均3d线性测量值之间的误差为0.83%，软组织测量值为1.78%，表明两种3D-CT方案的精度都很高。结论：3D-CT体绘制图像使用颅面测量可用于涉及颅面应用的人类学研究。
Objectives: This study was designed to determine the precision and accuracy of anthropometric measurements using three-dimensional computed tomography (3D-CT) volume rendering by computer systems for craniofacial clinical applications, and to compare the craniometric landmarks using bone and soft tissue protocols.Methods: The study population consisted of 13 cadaver heads that were examined with spiral CT. The archived CT data were transferred to a workstation, and 3D-CT volume rendered images were generated using computer graphics tools. Linear measurements (n = 10), based upon conventional craniometric anatomical landmarks (n = 08), were identified in 2D-CT and in 3D-CT images by two radiologists twice each independently, and then performed by 3D-CT imaging using a computer graphics systems using bone and soft tissue protocols. In total, 520 imaging measurements were made. The soft tissues were subsequently removed from the cadaver heads and the measurements were repeated using an electromagnetic 3 Space(TM) digitizer.Results: The results demonstrated no statistically significant difference between interobserver and intraobserver measurements or between imaging and physical measurements in both 3D-CT protocols. The standard error was found to be between 0.45% and 1.44% for all the measurements in both protocols, indicating a high level of precision. Furthermore, there was no statistically significant difference between imaging and physical measurements (P > 0.01). The error between the mean actual and mean 3D-based linear measurements was 0.83% for bone and 1.78% for soft tissue measurements, demonstrating high accuracy of both 3D-CT protocols.Conclusions: 3D-CT volume rendering images using craniometric measurements can be used for anthropological studies involving craniofacial applications.