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In the dataset containing the PMMA portion of the phantom, in the axial view, scroll to the homogeneous PMMA section. For large FOV devices, place the selection box by putting all four corners of the box on the edge of the phantom. For medium and small FOV devices, make the box as large as possible without going outside the phantom. Also be sure to avoid artifact regions at the border of the FOV, as they will hamper the analysis. Next, switch to the coronal or sagittal view. Align the top border of the selection with the top border of the PMMA section, so at the bottom border of the geometric pattern (the small holes). Select ‘PMMA’ from the insert list and press Evaluate. Copy the ‘NOISE’ and ‘UNI’ values into the form. Visual analyses For all visual analyses, the first choice should be to perform them using the workstation and software provided by the manufacturer of the CBCT device. Visual 45 SEDENTEXCT D3.4 Report – Appendix II: User Manual
