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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Updated: Jul 6, 2025

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Cone-beam x-ray luminescence computed tomography (CB-XLCT) prototype development and performance evaluation.

Yu-Hong Wang1,2, David Shih-Chun Jin1,3, Tian-Yu Wu4

  • 1Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, 112304 Taipei, Taiwan, ROC.

Physics in Medicine and Biology
|January 3, 2024
PubMed
Summary

A new rotational cone-beam x-ray luminescence computed tomography (CB-XLCT) system prototype was developed for pre-clinical theranostic imaging. This system shows potential for high-quality imaging in small animals with acceptable radiation doses.

Keywords:
computed tomographygeometric calibrationlow doseperformance evaluationprototypex-ray luminescence computed tomography (XLCT)

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Radiological Physics

Background:

  • X-ray luminescence computed tomography (XLCT) offers potential for theranostic applications.
  • Developing integrated XLCT systems requires addressing imaging chain calibration and optimal imaging conditions.
  • Pre-clinical studies are crucial for advancing XLCT technology towards clinical translation.

Purpose of the Study:

  • To develop and evaluate a prototype rotational cone-beam x-ray luminescence computed tomography (CB-XLCT) system.
  • To establish a geometric calibration method for both XL and CT imaging modalities.
  • To assess the system's performance and commercialization feasibility for pre-clinical theranostic imaging.

Main Methods:

  • A rotational CB-XLCT system prototype was designed using a low-dose x-ray tube and a rotating gantry.
  • Monte Carlo GATE simulations determined optimal imaging conditions for nanophosphor particles (NPs).
  • Image cross-correlation (ICC) was employed for automatic geometric calibration of XL and CT images.

Main Results:

  • The system achieved high linearity (0.99) and a contrast-to-noise ratio (CNR) of 19.5 in phantom experiments.
  • XL images demonstrated a Dice similarity coefficient (DICE) of 0.149 for 1 mm separation between light sources.
  • Demonstrated XLCT imaging results using Letter phantoms with NPs.

Conclusions:

  • The developed CB-XLCT prototype shows promise for high-quality pre-clinical imaging in small animals.
  • CT image performance is comparable to commercial systems; XL images show potential but require further development for biomedical applications.
  • The system's feasibility for commercialization was assessed, highlighting areas for future research.