Data Quality Analysis
Monitor the data quality of your CT scans over time directly in VGSTUDIO—based on the determination of the Modulation Transfer Function (MTF) and the Contrast Discrimination Function (CDF) from a scan of a cylindrical rod according to the ASTM Standard E 1695 “Standard Test Method for Measurement of Computed Tomography (CT) System Performance”. The data quality analysis enables long-term monitoring of the CT scan quality in the same software you use for your measurements and defect analyses. It can now also extract 2D slices from a 3D data set.
The determination is based on examination of the CT image of a uniform disk of material. The MTF is a measure for the sharpness of the edge while the CDF is related to the contrast-to-noise ratio. These functions are key determinants of the structural resolution of the CT system. The variation of the data quality along the axis of the scanned cylindrical rod can be examined by varying the position of the circular cross section for which MTF and CDF are determined.