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Using Synchrotron Radiation Microtomography to Investigate Multi-scale Three-dimensional Microelectronic Packages
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Published on: April 13, 2016

Phase retrieval in quantitative x-ray microtomography with a single sample-to-detector distance.

R C Chen1, H L Xie, L Rigon

  • 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China. rongchang.chen@gmail.com

Optics Letters
|May 5, 2011
PubMed
Summary

This study introduces a simplified absorption correction for x-ray phase retrieval, enabling material differentiation with single-distance phase-contrast computed tomography (PPCT) without prior sample knowledge.

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Area of Science:

  • Medical Imaging
  • Physics
  • Materials Science

Background:

  • X-ray propagation-based phase-contrast imaging offers enhanced sensitivity over traditional absorption-based methods.
  • Phase retrieval algorithms are crucial for extracting quantitative phase information from these images.
  • Current methods often require multiple sample-to-detector distances (SDD), increasing complexity and radiation dose.

Purpose of the Study:

  • To develop a simplified phase retrieval method for x-ray propagation-based phase-contrast computed tomography (PPCT) using a single SDD.
  • To introduce an absorption correction factor based on the phase-attenuation duality for improved accuracy.
  • To propose a practical method for determining the optimal absorption-to-phase ratio (ε) without prior sample information.

Main Methods:

  • Modification of the Bronnikov algorithm to incorporate a simple absorption correction factor.
  • Development of a method to calculate the optimal ε value directly from the data.
  • Validation using both simulated and experimental data from quasihomogeneous, weakly absorbing samples.

Main Results:

  • The proposed method successfully retrieves quantitative phase information using a single SDD.
  • The absorption correction factor effectively accounts for material attenuation.
  • Different materials within a complex sample were successfully distinguished using the single-SDD PPCT data.

Conclusions:

  • Single-SDD PPCT with the proposed absorption correction is a practical and effective approach for material characterization.
  • This method simplifies experimental setups and reduces radiation dose compared to multi-distance techniques.
  • The ability to determine optimal parameters without prior knowledge enhances the applicability of PPCT.