使用锥形束计算机断层扫描设备NewTom QR-DVT 9000确定的密度转换因子。
Density conversion factor determined using a cone-beam computed tomography unit NewTom QR-DVT 9000.
作者信息
Lagravère M O, Fang Y, Carey J, Toogood R W, Packota G V, Major P W
机构信息
Faculty of Medicine and Dentistry, Dentistry/Pharmacy Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2N8.
出版信息
Dentomaxillofac Radiol. 2006 Nov;35(6):407-9. doi: 10.1259/dmfr/55276404.
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 eFilm 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, rho (g cm(-3)), as the dependent variable in terms of the HU (H). The regression equation obtained was rho = 0.002H-0.381 with an R2 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.
目的
本研究的目的是确定从锥形束计算机断层扫描（CBCT - NewTom QR - DVT 9000）数据中，将亨氏单位（HU）转换为物质密度（g/cm³）的转换系数。
方法
制作六个不同密度材料的圆柱形模型，使用NewTom QR - DVT 9000容积扫描仪进行扫描。将原始数据转换为DICOM格式，并使用Merge eFilm和AMIRA进行分析，以确定模型不同区域的HU。
结果
各软件给出的HU之间无显著差异（P = 0.846）。以密度ρ（g/cm³）为因变量，对HU（H）进行线性回归。得到的回归方程为ρ = 0.002H - 0.381，R²值为0.986。亨氏单位情况下估计的标准误差为27.104 HU，密度情况下为0.064 g/cm³。
结论
CBCT为确定以亨氏单位表示的物质密度提供了一种有效的选择。
Zotero 插件