Density conversion factor determined using a cone-beam computed tomography unit NewTom QR-DVT 9000
Density conversion factor determined using a cone-beam computed tomography unit NewTom QR-DVT 9000
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DOI：
10.1259/dmfr/55276404
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发表时间：
2006-11-01
影响因子：
3.3
通讯作者：
Major, P. W.
中科院分区：
文献类型：
--
作者：
Lagravere, M. O.;Fang, Y.;Major, P. W.
目的：本研究的目的是确定从锥束计算机断层扫描（CBCT-NewTom QR-DVT 9000）数据中获得的Hounsfield单位（HU）与材料密度（g cm(-3)）的转换系数。方法：采用NewTom QR-DVT 9000体积扫描仪制作6个不同密度的圆柱形材料模型进行扫描。将原始数据转换为DICOM格式，并使用Merge eFilin和AMIRA进行分析，确定模型不同区域的HU。结果：各软件给出的HU值差异无统计学意义（P = 0.846）。使用密度p （g cm(-3)）作为HU (H)的因变量进行线性回归。回归方程为p = 0.002H - 0.381， R-2值为0.986。在霍斯菲尔德单位的情况下，估计的标准误差为27.104 HU，在密度的情况下为0.064 g cm（-3）。结论：CBCT为测定以Hounsfield单位表示的物质密度提供了有效的选择。
Objective: The purpose of this study was to determine a conversion coefficient for Hounsfield Units (HU) to material density (g cm(-3)) obtained from cone-beam computed tomography (CBCT-NewTom QR-DVT 9000) data.Methods: Six cylindrical models of materials with different densities were made and scanned using the NewTom QR-DVT 9000 Volume Scanner. The raw data were converted into DICOM format and analysed using Merge eFilin and AMIRA to determine the HU of different areas of the models.Results: There was no significant difference (P = 0.846) between the HU given by each piece of software. A linear regression was performed using the density, p (g cm(-3)), as the dependent variable in terms of the HU (H). The regression equation obtained was p = 0.002H - 0.381 with an R-2 value of 0.986. The standard error of the estimation is 27.104 HU in the case of the Hounsfield Units and 0.064 g cm(-3) in the case of density.Conclusion: CBCT provides an effective option for determination of material density expressed as Hounsfield Units.