Figure 6
From: The choice of an autocorrelation length in dark-field lung imaging
The maximal lung thickness possible to image at a given autocorrelation length without encountering saturation of the dark-field signal according to Eq. (11). Measurements indicated in orange were taken at \(V_0 = 6 \%\) and \(nI_0 = 80'000\) which represents our imaging parameters. The shaded region around the red line indicates the region of uncertainty due to the measurement and fitting accuracy. In green the 180–212 \(\upmu \hbox {m}\) PMMA spheres are displayed which have one data point well beyond the 20 cm line that allows interpolation, while the lung data has to be extrapolated. Lines for different \(\tau \) are indicated. The blue area indicates \(\xi \) below \({0.57}\,\upmu \hbox {m}\), which allows to image healthy human lungs in an inflated state avoiding saturation effects.
