Journal Article Research Support, U.S. Gov't, Non-P.H.S. X-ray detectors X-ray nanoimaging X-ray ptychography amorphous selenium coherent diffraction imaging commentary fast charge-integrating detectors high-energy X-ray detector high-energy diffraction microscopy lossy compression machine learning micrometre-scale spatial resolution perovskite CsPbBr3 pixel array detectors solution-grown materials ultrahigh flux