传统头颅侧位片与锥形束计算机断层扫描生成的头颅侧位片的比较。
Comparison between conventional and cone-beam computed tomography-generated cephalograms.
作者信息
Cattaneo Paolo M, Bloch Christian Borgkvist, Calmar Dorte, Hjortshøj Mette, Melsen Birte
机构信息
Department of Orthodontics, School of Dentistry, Faculty of Health Science, University of Aarhus, Aarhus, Denmark.
出版信息
Am J Orthod Dentofacial Orthop. 2008 Dec;134(6):798-802. doi: 10.1016/j.ajodo.2008.07.008.
INTRODUCTION
Cone-beam computed tomography (CBCT) is becoming established as an alternative and, in many aspects, superior radiographic technique to conventional radiography in orthodontics. However, cephalometric analysis is still an important tool in relation to treatment planning because 3-dimensional analyses are still not established. The aim of this study was to compare cephalometric measurements performed on conventional cephalograms with those on CBCT-synthesized images.
METHODS
Three observers digitized landmarks used for the Björk analysis on conventional lateral cephalograms and on 2 sets of CBCT-synthesized cephalograms (MIP and RayCast) from 34 patients.
RESULTS
The calculated measurements did not differ between the 3 image techniques. The RayCast technique proved to be more reproducible than the MIP.
CONCLUSIONS
CBCT-synthesized cephalograms can successfully replace conventional headfilms.
引言
锥形束计算机断层扫描（CBCT）正逐渐成为正畸学中传统放射成像的一种替代方法，并且在许多方面优于传统放射成像技术。然而，由于三维分析尚未确立，头影测量分析在治疗计划方面仍然是一项重要工具。本研究的目的是比较在传统头影测量片上进行的头影测量与在CBCT合成图像上进行的头影测量。
方法
三名观察者对34例患者的传统侧位头影测量片以及两组CBCT合成头影测量片（最大密度投影法（MIP）和容积再现法（RayCast））上用于比约克分析的标志点进行数字化处理。
结果
三种图像技术之间计算得出的测量值没有差异。容积再现法被证明比最大密度投影法具有更高的可重复性。
结论
CBCT合成头影测量片能够成功替代传统头颅侧位片。
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