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X-ray Imaging

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...

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Broadband X-ray ptychography using multi-wavelength algorithm.

Yudong Yao¹, Yi Jiang¹, Jeffrey Klug¹

¹Advanced Photon Source, Argonne National Laboratory, IL 60439, USA.

Journal of Synchrotron Radiation

|January 5, 2021

Summary

This summary is machine-generated.

A new multi-wavelength algorithm enhances ptychography (a scanning microscopy technique) for high-resolution imaging. This method overcomes limitations of broadband sources, improving reconstructions with increased source bandwidth and scan step size.

Keywords:

coherent diffraction imaging high-throughput partial coherence ptychography

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Area of Science:

Coherent diffraction imaging
Scanning microscopy
X-ray imaging

Background:

Ptychography offers high-resolution imaging of internal sample structures.
Broadband sources increase flux but challenge coherence requirements for ptychography.
Current methods struggle with broad bandwidth and varying spot sizes.

Purpose of the Study:

To develop a multi-wavelength reconstruction algorithm for ptychography.
To address challenges posed by broadband sources and experimental imperfections.
To improve reconstruction accuracy and efficiency in ptychography.

Main Methods:

Developed a multi-wavelength reconstruction algorithm for ptychography.
Incorporated physical modeling of spot size variation with energy.
Combined multi-wavelength and mixed-state approaches to handle partial coherence.

Main Results:

The multi-wavelength approach significantly improves ptychography reconstructions.
The method is effective even with increased source bandwidth, illumination size, and scan step size.
Accurate energy spectrum information is not required beforehand.
Combined approaches successfully handle temporal and spatial partial coherence.

Conclusions:

The developed multi-wavelength algorithm enhances ptychography imaging quality and efficiency.
This method allows for the use of high-flux broadband X-ray sources.
The approach relaxes coherence requirements, enabling high-resolution imaging under challenging experimental conditions.