中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (20): 3252-3256.doi: 10.3969/j.issn.2095-4344.2014.20.025

• 组织构建基础实验 basic experiments in tissue construction • 上一篇    下一篇

锥形束CT线性测量头颅骨的精确性

孙晓琳,王学金,陈志国,金  磊   

  1. 大连大学附属中山医院口腔科,辽宁省大连市  116021
  • 收稿日期:2014-02-19 出版日期:2014-05-14 发布日期:2014-05-14
  • 通讯作者: 王学金,大连大学附属中山医院口腔科,辽宁省大连市 116021
  • 作者简介:孙晓琳,女,1980年生,辽宁省大连市人,汉族,2006年大连医科大学口腔医学院毕业,硕士,主治医师,主要从事口腔正畸、修复研究。
  • 基金资助:

    大连市科技局科学研究一般项目(2012E12SF075)

Linear measurement accuracy using cone-beam computed tomography for human skull

Sun Xiao-lin, Wang Xue-jin, Chen Zhi-guo, Jin Lei   

  1. Department of Stomatology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116021, Liaoning Province, China
  • Received:2014-02-19 Online:2014-05-14 Published:2014-05-14
  • Contact: Wang Xue-jin, Department of Stomatology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116021, Liaoning Province, China
  • About author:Sun Xiao-lin, Master, Attending physician, Department of Stomatology, Affiliated Zhongshan Hospital of Dalian University, Dalian 116021, Liaoning Province, China
  • Supported by:

    General Program of Scientific Research of Dalian Municipal Science and Technology Bureau, No. 2012E12SF075

摘要:

背景:锥形束CT在口腔医学中的应用日益广泛,优点不可取代,线性测量是其重要功能之一,线性测量在整个头颅范围内的精确性和可重复性有待进一步研究,不同的分辨率和扫描层厚对线性结果的影响也需要进一步研究。
目的:评价锥形束CT在两种不同象素下对人头颅骨线性测量结果的精确性。
方法:选取4个干头颅,选定其上22个解剖标志点进行11条线段长度的物理测量作为金标准,将头颅进行锥形束CT 0.3 mm和0.15 mm两种不同象素的扫描,在轴位图像和冠状位图像上进行线段测量,SPSS 17.0软件比较图像测量和物理测量值的差异。
结果与结论:物理测量和图像测量结果的差值在-0.27-0.14之间,两种象素的差值均与物理测量结果之间差异无显著性意义(P > 0.05),两种象素结果相比差异也没有显著性意义(P > 0.05)。结果可见锥形束CT在轴向和冠状向上的线段测量具有很高的精确性,当进行线性测量时推荐使用较大的分辨率(0.3 mm),这样放射剂量更小,扫描时间更快。



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

关键词: 组织构建, 骨组织工程, 植入物, 锥形束CT, 种植, 头颅, 线性测量, 象素, 分辨率

Abstract:

BACKGROUND: Cone-beam computed tomography has been widely applied in the dentistry due to irreplaceable advantages. Among those advantages, linear measurement is one of the important ones. Further studies are suggest to explore the accuracy and repeatability of linear measurement for the whole skull, as well as the effect of different resolution and scanning thickness on the linear measurement results.
OBJECTIVE: To evaluate the accuracy of linear measurement using cone-beam computed tomography (Newtom VG) on the human skull, with two different voxel sizes.
METHODS: In this study, 22 anatomic landmarks in four dry human skulls were marked and 11 linear measurements were obtained. These were considered to be the gold standard (real measurement). The skulls were scanned by cone-beam computed tomography (Newtom VG) at two voxel sizes: 0.3 mm and 0.15 mm. Linear measurement was performed in axial and coronal planes. SPSS software version 17 was used for data analysis between radiographic measurement and real measurement.
RESULTS AND CONCLUSION: The mean differences of real and radiographic measurements were -0.27 to 0.14 in four different sections, and statistical analysis showed no significant difference between linear measurements and gold standard (P > 0.05). There was no significant between two different voxel sizes       (P > 0.05). Cone-beam computed tomography (Newtom VG) is highly accurate and reproducible in linear 
measurements in the axial and coronal planes. A cone-beam computed tomography scan with a larger voxel size (0.3 mm) is recommended, resulting in lower radiation dose and faster scan time.



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


全文链接:

Key words: cone-beam computed tomography, cephalometry, skull, dental implantation

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