Density Conversion Factor Determined using a Cone-Beam Computed Tomography Unit NewTom QR-DVT 9000

• Author(s) / Creator(s)

  • Carey, Jason
  • Lagravère, Manuel O.
  • Major, Paul W.
  • Fang, Y.
  • Packota, Garnet V.
  • Toogood, Roger W.

• 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, ρ (g cm−3), as the dependent variable in terms of the HU (H). The regression equation obtained was ρ=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.

• Date created

  2006

• Subjects / Keywords

  • Hounsfield Value
  • Computerized Tomography
  • Bone Density

• Type of Item

  Article (Published)

• DOI

  https://doi.org/10.7939/R3ZG6GM6D

• License

  © 2006 Manuel O. Lagravère et al. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.