Imaging outside the box: Resolution enhancement in X-ray coherent diffraction imaging by extrapolation of diffraction patterns

TL;DR

This paper presents a method to improve resolution in X-ray coherent diffraction imaging by extrapolating diffraction patterns, effectively recovering missing data and enhancing the reconstructed image quality.

Contribution

It introduces an extrapolation technique for diffraction patterns that enhances resolution in non-periodical object imaging, addressing missing data issues.

Findings

Resolution of reconstructed images is improved.

Extrapolation effectively recovers missing diffraction data.

Enhanced agreement with experimental amplitudes.

Abstract

Coherent diffraction imaging is a high-resolution imaging technique whose potential can be greatly enhanced by applying the extrapolation method presented here. We demonstrate enhancement in resolution of a non-periodical object reconstructed from an experimental X-ray diffraction record which contains about 10% missing information, including the pixels in the center of the diffraction pattern. A diffraction pattern is extrapolated beyond the detector area and as a result, the object is reconstructed at an enhanced resolution and better agreement with experimental amplitudes is achieved. The optimal parameters for the iterative routine and the limits of the extrapolation procedure are discussed.