Fig. 6: Analysis of the experimental lineouts and detection threshold.

The lineouts of the experimental features shown in Fig. 2a and d for 9.05 keV and 8.92 keV are presented in (a) and (b). The width of the transmission-affected region is estimated using a threshold set at 5% of the peak signal. Due to fluctuations in the measured signals, the detection threshold varied between 0.15% and 0.23% in transmission changes over the data analyzed. c An estimate of the minimum changes in foil thickness is considered by calculating changes in X-ray transmission at 8.05 keV through a solid copper foil with a various thickness of (2 µm – ∆L). The shading indicates the detection threshold range (0.15–0.23%). With these thresholds, this figure suggests that our imaging technique detects changes in transmission when the foil thickness varies from the initial 2 µm thickness by more than 32.4 nm.