Akansel Gur, Inan Nagihan, Kurtas Omer, Sarisoy H Tahsin, Arslan Arzu, Demirci Ali
Kocaeli University School of Medicine, Department of Radiology, Umuttepe Campus, 31380 Kocaeli, Turkey.
Forensic Sci Int. 2008 Jul 4;178(2-3):93-5. doi: 10.1016/j.forsciint.2008.02.006. Epub 2008 Apr 2.
Cadaveric studies yielded promising results in sexing the temporal bones by measuring the lateral angle of the internal acoustic canal meatus. In this study, we evaluated the capability of computerized tomography of the temporal bone to reproduce these results.
Lateral angle of the internal acoustic canal meatus was measured in 92 patients (47 females and 45 males) on axial slices of high resolution computerized tomography scans of the temporal bone. The patients underwent computerized tomography as part of clinical work up for ear-related complaints. The measurement technique was modified from a cadaveric study in which a significantly higher mean lateral angle measurement was observed in females than in males. The mean values from females and males were compared statistically.
The mean lateral angle as measured on computerized tomography of the temporal bone is greater in females (45.5+/-7.1 degrees ) than in males (41.6+/-6.7 degrees ). The difference is significant at p<0.01, as tested by one-way ANOVA. Due to significant overlap in ranges of measurements, no single cut-off value that satisfactorily differentiates between the genders could be determined. However, measurements of 35 degrees and lesser were 93.6% specific for male gender and measurements of 60 degrees and greater were 97.7% specific for female gender.
Computerized tomography of the temporal bone is capable of replicating the results from the cadaveric measurements in determining the lateral angle. Due to the large range of measurements within both genders, this measurement should be regarded as supportive and not conclusive evidence for the sex of the subject.
尸体研究通过测量内耳道开口的外侧角在颞骨性别鉴定方面取得了有前景的结果。在本研究中，我们评估了颞骨计算机断层扫描再现这些结果的能力。
在92例患者（47例女性和45例男性）的颞骨高分辨率计算机断层扫描轴位片上测量内耳道开口的外侧角。这些患者因耳部相关症状进行计算机断层扫描作为临床检查的一部分。测量技术是从一项尸体研究修改而来，该研究中观察到女性的平均外侧角测量值显著高于男性。对女性和男性的平均值进行统计学比较。
颞骨计算机断层扫描测量的平均外侧角在女性中（45.5±7.1度）大于男性（41.6±6.7度）。经单因素方差分析测试，差异在p<0.01时具有统计学意义。由于测量范围存在显著重叠，无法确定一个能令人满意地区分性别的单一临界值。然而，35度及以下的测量值对男性的特异性为93.6%，60度及以上的测量值对女性的特异性为97.7%。
颞骨计算机断层扫描能够在确定外侧角方面复制尸体测量的结果。由于两性测量范围都很大，该测量应被视为支持性而非决定性的个体性别证据。
