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Density conversion factor determined using a cone-beam computed tomography unit NewTom QR-DVT 9000.

M O Lagravère·Y Fang·J Carey·R W Toogood·G V Packota·P W Major
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Abstract

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.

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HumansImage Processing, Computer-AssistedImaging, Three-DimensionalPhantoms, ImagingRadiographic Image EnhancementSoftwareTomography Scanners, X-Ray ComputedTomography, X-Ray ComputedJournal Article

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M O Lagravère, Y Fang, J Carey, R W Toogood, G V Packota, P W Major. 2006. Density conversion factor determined using a cone-beam computed tomography unit NewTom QR-DVT 9000.. https://doi.org/10.1259/dmfr%2F55276404

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