Effect of Head Position of Facial Soft Tissue Depth Measurements Obtained Using Computed Tomography

Forensic Summary by Emma-Rae Ranger

Traditional methods of facial soft tissue depth analysis involve the use of CT data and the measurements recorded from raw 2D orthoslices. One common inconsistency was the movement or positioning of the skull during the CT scanning/data collection process. Through the analysis of different methods of head placement, and the data collected at 18 different data points, the study showed that there was a significant difference in at least 8 of the data point readings. All eight of these data readings, when differed, proved to be statistically significant. In order to achieve the highest/most accurate results, one must maintain complete control over the skull. The most accurate reading came from a CT scan after rotating the head towards the Frankfurt horizontal once a 3D rendering of the data is complete.

Caple, J. M., Stephan, C. N., Gregory, L. S. and MacGregor, D. M. (2016), Effect of Head Position on Facial Soft Tissue Depth Measurements Obtained Using Computed Tomography. J Forensic Sci, 61: 147–152. doi:10.1111/1556-4029.12896

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