Coherent Diffractive Imaging (CDI)

In a CDI experiment, the diffraction intensities are used directly in order to retrieve the phase. As the process relies on accurate intensities, minimal detector requirements include an ability to detect intensities over 6 orders of magnitude (a high dynamic range) and good sampling (a small pixel size). Before the object is recovered via Fourier inversion, the data need to be corrected and cleaned of errant pixels and cosmics, so other detector requirements include reproducible performance, stable correction files, and an ability to suppress high-energy photons.  

However, the technique is becoming dynamic through experiments that use methods such as real-time monitoring, as well as ptychography (a scanning modality of CDI). In both cases, detector requirements include features such as a high frame rate with short readout times and a high pixel-count-rate capability, without compromising data quality.