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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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Fast digital lossy compression for X-ray ptychographic data.

Panpan Huang1, Ming Du2, Mike Hammer2

  • 1Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA.

Journal of Synchrotron Radiation
|January 5, 2021
PubMed
Summary
This summary is machine-generated.

Hybrid pixel array detectors (HPADs) require data compression for higher frame rates. A new adaptive encoding quantization scheme significantly reduces data transfer needs with minimal impact on image quality in ptychography.

Keywords:
X-ray ptychographylossy compressionpixel array detectors

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Area of Science:

  • Physics
  • Materials Science
  • Computer Science

Background:

  • Synchrotron light sources demand higher frame rates from hybrid pixel array detectors (HPADs).
  • Charge integration is favored over photon counting at higher X-ray brightness.
  • Uncompressed data transfer limits detector design and achievable frame rates.

Purpose of the Study:

  • To describe an easily implementable data compression scheme for HPADs.
  • To evaluate the impact of varying compression levels on image quality in ptychography.
  • To enable higher continuous frame rates for synchrotron X-ray imaging.

Main Methods:

  • Development of an adaptive encoding quantization data compression scheme.
  • Simulation of data digitization and compression within an application-specific integrated circuit (ASIC).
  • Analysis of image quality in ptychography reconstructions under different compression ratios.

Main Results:

  • The proposed scheme digitizes signals up to 16383 photons per pixel (14 bits) using only 8 or 9 bits for transfer.
  • Negligible impact on the quality of reconstructed images in ptychography was observed.
  • The compression method is suitable for implementation in HPAD ASICs.

Conclusions:

  • Adaptive encoding quantization offers an effective solution for data compression in HPADs.
  • This approach allows for higher frame rates without compromising imaging performance.
  • The developed scheme facilitates advanced X-ray imaging techniques at synchrotron facilities.