Accuracy of facial soft tissue thickness measurements in personal computer-based multiplanar reconstructed computed tomographic images

被引:78
作者
Kim, KD
Ruprecht, A
Wang, G
Lee, JB
Dawson, DV
Vannier, MW
机构
[1] Yonsei Univ, Coll Dent, Human Identificat Res Inst, Oral Sci Res Ctr,Dept Oral & Maxillofacial Radiol, Seoul 120752, South Korea
[2] Univ Iowa, Coll Dent, Dept Oral Pathol Radiol & Med, Iowa City, IA 52242 USA
[3] Univ Iowa, Coll Med, Dept Radiol, Iowa City, IA 52242 USA
[4] Univ Iowa, Coll Med, Dept Anat & Cell Biol, Iowa City, IA 52242 USA
[5] Clinic3D Inc, Seoul 135814, South Korea
[6] Univ Iowa, Coll Dent, Dept Prevent & Community Dent, Iowa City, IA 52242 USA
关键词
face; measurement; soft tissue thickness; CT; MPR image; PC-based;
D O I
10.1016/j.forsciint.2004.11.004
中图分类号
DF [法律]; D9 [法律]; R [医药、卫生];
学科分类号
0301 ; 10 ;
摘要
The purpose of this study was to determine the precision and accuracy of facial soft tissue measurement using personal computer (PC)-based multiplanar reconstructed (MPR) computed tomography (CT) images and to evaluate the effect of the various CT scanning protocols on the facial soft tissue thickness measurement. Thirteen different CT imaging protocols were used to image a cadaver head. MPR reformations and three-dimensional (3D) reconstructions viewed on a laptop PC were used to make measurements at six specific sites on each set of images. These measurements were compared to physical measurements at the same sites. Increasing the slice thickness resulted in decreased image quality. Within the same slice thickness, increasing the pitch ratio in the spiral mode, resulted in decreasing image quality. The image quality of conventional CT scanning was relatively poorer than that of the spiral CT scanning. However, the mean deviation from the physical measurement was within 0.43 mm in every instance. This mean deviation was quite small and clinically acceptable for measuring the soft tissue thickness of the facial area. PC-based MPR CT images of the face using routine scanning CT protocols can be used to accurately measure soft tissue thickness in the facial region. However, for more fine and accurate data collection. scanning protocols with slice thicknesses less than 5 mm, and a spiral/helical mode pitch less than 2:1 are recommended. (c) 2004 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:28 / 34
页数:7
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