Figure 4
From: X-ray fan beam coded aperture transmission and diffraction imaging for fast material analysis
Rock specimens scanned by the X-ray fan beam coded aperture imaging system. (a) Photograph of the fieldstone (top), asphalt (middle), and limestone (bottom). (b) Transmission scan of the rock specimens. (c) Raw multiplexed scatter data from central fan slice showing the textured signal from the rocks. (d) Combined transmission + q colorization (TQC) image of the rocks showing new spatial variations relative to transmission alone. (e.i–iv) XRD spectra extracted from the marked locations in (d), compared against commercial diffractometer measurements of the rock specimens. (f) Hyperspectral display of the asphalt rock (selected due to its higher XRD spatial variation) over distinct q windows.
