Bulut Ozgur, Jessica Liu Ching-Yiu, Koca Fatih, Wilkinson Caroline
Department of Anthropology, Hitit University, Corum, Turkey.
Face Lab, Liverpool John Moores University, Liverpool, United Kingdom.
Leg Med (Tokyo). 2017 Jul;27:32-37. doi: 10.1016/j.legalmed.2017.06.002. Epub 2017 Jun 22.
Facial soft tissue thicknesses (FSTT) measurements collected from Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) imaging techniques are most commonly taken in the supine position for forensic craniofacial reconstruction. FSTT have been shown to be different in comparison to the upright position due to gravity. The variation of facial morphology between the upright and supine position of laser-scanned images taken from 44 individuals was investigated using volumetric analysis with deviation maps. Between 82.4% and 86.7% of the facial surface area were within the error range of ±2mm between the supine and the upright position. This indicates that most anatomical landmarks taken from the MRI and CT data can be an accurate representative of the FSTT in the upright position. Seven landmarks located around the buccal region, masseteric region and the nasolabial region of the face showed the greatest FSTT deviation between the upright and supine position, thus these landmarks may affect the accuracy of facial reconstructions when using a CT or MRI database.
从磁共振成像（MRI）和计算机断层扫描（CT）成像技术收集的面部软组织厚度（FSTT）测量值，在法医颅面重建中最常采用仰卧位获取。由于重力作用，FSTT与直立位相比已显示出差异。使用带有偏差图的体积分析方法，对44名个体的激光扫描图像在直立位和仰卧位之间的面部形态变化进行了研究。仰卧位和直立位之间82.4%至86.7%的面部表面积在±2mm的误差范围内。这表明，从MRI和CT数据获取的大多数解剖标志点可以准确代表直立位的FSTT。位于面部颊部区域、咬肌区域和鼻唇区域周围的七个标志点在直立位和仰卧位之间显示出最大的FSTT偏差，因此，在使用CT或MRI数据库时，这些标志点可能会影响面部重建的准确性。
