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Related Experiment Video

Updated: Jan 31, 2026

Novel Photoacoustic Microscopy and Optical Coherence Tomography Dual-modality Chorioretinal Imaging in Living Rabbit Eyes
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Dual-modality optical projection tomography reconstruction method from fewer views.

Shaobin Dou1, Jinhuai Liu1, Lianghuai Yang2

  • 1Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, China.

Journal of Biophotonics
|December 23, 2018
PubMed
Summary

We improved optical projection tomography (OPT) for faster, lower-dose imaging. Our new algorithm reconstructs high-quality images from fewer projections, significantly reducing acquisition time for longitudinal studies.

Keywords:
dual-modality OPTimage reconstructionmolecular imagingpreimaging calibration

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Area of Science:

  • Biomedical Imaging
  • Optical Physics
  • Computational Imaging

Background:

  • Longitudinal studies using optical projection tomography (OPT) require repeated measurements, increasing total acquisition time and light exposure.
  • Reducing acquisition time and light dose is crucial for in vivo imaging of living models.

Purpose of the Study:

  • To improve the ordered subsets expectation maximization (OSEM) reconstruction algorithm for OPT.
  • To enable faster image acquisition and reduce light dose in longitudinal OPT studies.
  • To demonstrate the effectiveness of the improved OSEM algorithm using zebrafish models.

Main Methods:

  • Enhanced the ordered subsets expectation maximization (OSEM) algorithm for OPT.
  • Reconstructed images from downsampled projection subsets in transmission and fluorescence modes.
  • Compared the OSEM method with filtered back projection (FBP) using varying numbers of projections.

Main Results:

  • The improved OSEM algorithm significantly reduced acquisition time and the number of projections needed.
  • Reconstructed image quality using 30 projections with OSEM was comparable to FBP using 720 projections.
  • The method demonstrated robustness against noise and artifacts, completing acquisition in seconds.

Conclusions:

  • The enhanced OSEM algorithm offers a substantial improvement for OPT, enabling rapid, low-dose imaging.
  • This method is highly suitable for longitudinal studies of living models, such as zebrafish.
  • The technique provides high-quality reconstructions while minimizing sample stress and data acquisition duration.