Garvin Heather M, Severa Kieran
Department of Anatomy, Des Moines University, 3200 Grand Avenue, Des Moines, IA, 50312.
College of Pharmacy & Health Sciences, Drake University, 2507 University Avenue, Des Moines, IA, 50311.
J Forensic Sci. 2019 Sep;64(5):1462-1467. doi: 10.1111/1556-4029.14026. Epub 2019 Feb 8.
Mandibular length, mandibular angle, and maximum ramus height measurements used during forensic evaluation of skeletal remains require use of a mandibulometer. This study presents a new method of taking these measurements from images, so that practitioners without access to an expensive mandibulometer or those working with 3D models (e.g., CT scans) can collect and utilize these measurements. Ten trials performed on a sample of 45 mandibles were used to compare measurements collected from photographs and images extracted from 3D surface scans to those collected with a mandibulometer, including intra- and inter-observer analyses. All technical error of measurement (TEM) values were less than 2 mm regardless of observer, trial, or method. Relative TEM values were less than 2% for all except mandibular length (2.10%) and ramus height (2.32%) for the right versus left photographs. Results are comparable with mandibulometer error rates, indicating that the proposed method is accurate and reliable.
在对骨骼遗骸进行法医评估时，下颌骨长度、下颌角和下颌支最大高度的测量需要使用下颌骨测量仪。本研究提出了一种从图像中获取这些测量值的新方法，这样，无法使用昂贵下颌骨测量仪的从业者或使用3D模型（如CT扫描）的人员就可以收集并利用这些测量值。对45个下颌骨样本进行了十次试验，以比较从照片和3D表面扫描提取的图像中收集的测量值与使用下颌骨测量仪收集的测量值，包括观察者内和观察者间分析。无论观察者、试验或方法如何，所有测量技术误差（TEM）值均小于2毫米。除右侧与左侧照片的下颌骨长度（2.10%）和下颌支高度（2.32%）外，所有相对TEM值均小于2%。结果与下颌骨测量仪的误差率相当，表明所提出的方法准确可靠。
