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sCMOS rolling shutter compensation for dynamic micro-computed tomography.

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|December 15, 2025
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Summary
This summary is machine-generated.

A new by-row gating technique for dynamic micro-computed tomography (micro-CT) eliminates motion artifacts from rolling shutter detectors. This method improves image quality and spatiotemporal resolution compared to traditional by-frame gating.

Keywords:
4DCTmotion artifactsretrospective gatingsynchrotron imagingtime-resolved image reconstruction

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Area of Science:

  • Medical Imaging
  • Physics
  • Engineering

Background:

  • Dynamic micro-computed tomography (micro-CT) is crucial for studying microstructural dynamics.
  • Rolling shutter acquisition on scientific complementary metal-oxide-semiconductor detectors introduces motion artifacts.
  • Conventional by-frame gating assumes simultaneous pixel acquisition, leading to inaccuracies.

Purpose of the Study:

  • To develop a pixel-row-specific retrospective gating technique for dynamic micro-CT.
  • To eliminate motion artifacts caused by rolling shutter acquisition.
  • To improve the accuracy and resolution of dynamic micro-CT imaging.

Main Methods:

  • A novel by-row gating technique accounting for pixel row acquisition timing was developed.
  • The by-row gating method was compared to conventional by-frame gating.
  • Analytical, numerical (simulated phantom), and experimental (inflatable object, ex vivo lung) validations were performed.

Main Results:

  • By-row gating minimizes projection image phase errors, reducing out-of-phase motion and artifacts.
  • Phase errors in by-row gating depend on detector integration time and phase bin width.
  • By-frame gating propagates spatially varying errors, increasing artifacts with distance from the center of rotation.

Conclusions:

  • By-row gating effectively eliminates rolling shutter artifacts in dynamic micro-CT.
  • The technique enables accurate reconstruction of high-speed phenomena.
  • By-row gating offers superior performance over by-frame gating for microstructural dynamics studies.