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Gamma-ray CT from incomplete projections for two-phase pipe flow.

S Xin1, H X Wang2

  • 1Beijing University of Civil Engineering and Architecture, Beijing, People's Republic of China.

The Review of Scientific Instruments
|March 3, 2017
PubMed
Summary
This summary is machine-generated.

A low-dose gamma-ray computed tomography (CT) system was developed for gas-liquid two-phase pipe flow measurement. The system successfully reconstructs images from incomplete projections, enabling effective flow monitoring.

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Area of Science:

  • Nuclear Engineering
  • Imaging Science
  • Fluid Dynamics

Background:

  • Gas-liquid two-phase flow measurement is crucial for industrial processes.
  • Traditional methods face limitations in accuracy and safety.
  • Gamma-ray computed tomography (CT) offers a non-invasive alternative.

Purpose of the Study:

  • To develop and evaluate a low-energy, low-dose gamma-ray CT system for two-phase pipe flow.
  • To improve image reconstruction from incomplete projections.
  • To optimize scanning parameters and reduce radiation dose.

Main Methods:

  • Utilized a third-generation X-ray CT configuration with a 241Am source and CdZnTe detectors.
  • Implemented an A-variable algebraic reconstruction technique (ART) for image reconstruction.
  • Conducted static and dynamic experiments with full and partial scan data.

Main Results:

  • Achieved a spatial image resolution of approximately 7 mm.
  • Demonstrated successful image reconstruction from incomplete projections.
  • Identified acceptable performance for flow rates < 0.04 m/s at imaging speeds < 33 frames/s.

Conclusions:

  • The developed gamma-ray CT system is feasible for two-phase pipe flow measurement.
  • Image reconstruction from incomplete projections is viable, reducing scanning time and dose.
  • The system provides a promising tool for industrial flow monitoring and optimization.