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

Area of Science:

• Medical Imaging
• Materials Science

Background:

• Cone-beam computed tomography (CBCT) is increasingly used in various fields.
• Accurate material density determination is crucial for quantitative analysis.

Purpose of the Study:

• To establish a conversion coefficient for Hounsfield Units (HU) to material density (g cm(-3)) using CBCT data.
• To validate the accuracy of CBCT for material density assessment.

Main Methods:

• Six cylindrical models of varying densities were scanned using a NewTom QR-DVT 9000 CBCT scanner.
• Raw CBCT data were processed using Merge eFilm and AMIRA software to extract Hounsfield Units (HU).
• Linear regression analysis was performed to correlate HU with known material densities.

Main Results:

• Software analysis yielded consistent HU values across different platforms (P = 0.846).
• A linear regression model (rho = 0.002H-0.381) demonstrated a strong correlation (R2 = 0.986) between HU and density.
• The model achieved a standard error of 0.064 g cm(-3) for density estimation.

Conclusions:

• CBCT is an effective tool for determining material density.
• The derived conversion coefficient enables accurate density quantification from CBCT Hounsfield Units.