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Related Experiment Video

Updated: May 27, 2026

Contrast Enhanced Vessel Imaging using MicroCT
05:50

Contrast Enhanced Vessel Imaging using MicroCT

Published on: January 27, 2011

A dual micro-CT system for small animal imaging.

C T Badea1, S Johnston, B Johnson

  • 1Center for In Vivo Microscopy, Dept. of Radiology, Duke University Medical Center, Durham, NC 27710.

Proceedings of Spie--The International Society for Optical Engineering
|November 4, 2011
PubMed
Summary

This study introduces a dual micro-CT system for enhanced small animal imaging. The system reduces scan times and contrast injections for functional studies like cardiac and perfusion imaging.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Small Animal Imaging

Background:

  • Micro-computed tomography (Micro-CT) is a standard non-invasive technique for small animal morphology assessment.
  • Functional micro-CT imaging has been previously demonstrated, enabling dynamic physiological studies.
  • Cardiac and perfusion imaging in small animals present significant challenges due to motion and speed requirements.

Purpose of the Study:

  • To describe a novel dual micro-CT system designed for advanced functional imaging in small animals.
  • To enable simultaneous acquisition of projections, reducing scan duration and contrast agent usage.
  • To facilitate challenging applications such as cardiac and perfusion studies.

Main Methods:

  • Development of a dual micro-CT system with two fixed X-ray tube/detector pairs for simultaneous projection acquisition.

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  • Integration of in-house software for cardio-respiratory monitoring and gating.
  • Optimization of sampling geometry and implementation of a geometric calibration procedure for combining data from dual chains.
  • Evaluation of image quality metrics including spatial resolution, uniformity, noise, and linearity.

    • Main Results:

    • The dual system reduces scanning time and contrast injections by a factor of two for perfusion studies.
    • Spatial resolution (MTF at 10%) was measured at 3.4 lp/mm for single detector and 2.3 lp/mm for dual detector reconstructions.
    • A slight loss in spatial resolution in dual reconstructions is attributed to calibration errors between the two imaging chains.
    • The system successfully performs morphological and functional imaging in rats and mice.

    Conclusions:

    • The dual micro-CT system effectively addresses the challenges of functional imaging in small animals.
    • Simultaneous acquisition significantly improves efficiency for cardiac and perfusion studies.
    • Further refinement of calibration procedures may enhance spatial resolution in dual-detector reconstructions.