Abstract
Objectives
To determine whether phase-contrast X-ray imaging can be used to visualise directly the accumulated extracellular matrix proteins associated with liver fibrosis in common bile duct ligated mice.
Methods
Twenty-six-week-old C57BL female mice were randomised into three groups. In groups 1 (n = 5) and 2 (n = 10), common bile duct ligation was conducted to produce secondary biliary cirrhosis. Mouse livers were then excised 15 (group 1) and 40 days (group 2) after the ligation of the common bile duct for imaging. In the control group, the livers of 5 mice were excised 40 days after the sham operation. Images were then acquired using the analyser crystal set at different positions of the rocking curve.
Results
The results show that the fibrotic septa and hepatic lobules enclosed by fibrotic septa can be visualised clearly at the whole organ level via phase-contrast X-ray imaging without any contrast agent.
Conclusion
These results suggest that phase-contrast X-ray imaging can easily reveal the accumulated extracellular matrix proteins associated with liver fibrosis without using any contrast agent and has great potential in the study of liver fibrosis.
Key Points
• Phase-contrast X-ray imaging may aid the study of liver fibrosis.
• It provides higher contrast and spatial resolution (ca. 10 μm) than conventional radiography.
• It can reveal fibrotic septa, small ducts and vessels without using contrast agents.
• Results in animals now need to be translated to human clinical practice.
Abbreviations
- BSRF:
-
Beijing Synchrotron Radiation Facility
- CCD:
-
charge-coupled device
- DEI:
-
diffraction-enhanced imaging
- FDI:
-
fast digital imager
- FWHM:
-
full width at half maximum
- SR:
-
synchrotron radiation
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Acknowledgements
The work was done at the 4W1A Topography Station of the Beijing Synchrotron Radiation Facility (BSRF) and was supported by the Shanghai Municipal Natural Science Foundation (no. 11ZR1407800), the National Natural Science Foundation of China (no. 81172073) and the National Program on Key Basic Research Project (973 program, no. 2010CB834305).
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Zhang, X., Yang, XR., Chen, Y. et al. Visualising liver fibrosis by phase-contrast X-ray imaging in common bile duct ligated mice. Eur Radiol 23, 417–423 (2013). https://doi.org/10.1007/s00330-012-2630-z
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DOI: https://doi.org/10.1007/s00330-012-2630-z