Abstract
Introduction
Thrombosis of the cerebral veins and sinus are common causes of stroke. Animal models help us to understand the underlying pathophysiology of this condition. Therefore, the purpose of our study was to evaluate a well-established model for sinus sagittalis (SSS) thrombosis using micro- and nanocomputed tomography (CT) imaging.
Methods
SSS thrombosis was performed in four rats. After contrast perfusion, brains were isolated and scanned using micro-CT at (8 µm)³ voxel size to generate 3D images of the cerebral vasculature. For more detailed information on vascular perfusion territories, nano-CT imaging was performed to investigate the boundary layer of contrast-enhanced vessels and the occluded veins. The venous and arterial vascular volume fraction and gray scale measurements were obtained in the SSS thrombosis group and compared to controls. The significance of differences in vascular volume fraction and gray scale measurements was tested with analysis of variance. Results were complemented with histology.
Results
Micro-CT proved to accurately visualize and differentiate vascular occlusion territories performed in the SSS thrombosis model. Moreover, 3D micro-CT provided quantitative information on arterial and venous vascular volume fraction. Micro-CT imaging enables a total 3D visualization of complications (ventricle rupture) in the SSS thrombosis model. We established gray scale measurements by which focal cerebral ischemia could be radiographically categorized (p < 0.001).
Conclusions
Using nano-CT, the interface of contrast-perfused and occluded veins can be visualized. Micro-CT is feasible for analysis and differentiation of perfusion territories in an animal model of focal cerebral ischemia.
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Acknowledgments
We would like to thank G. Martels, Justus-Liebig University, Giessen, Germany, for technical assistance. The investigation was supported in part from the Faculty of Human Medicine of the Justus-Liebig University, Giessen, Germany, and the DFG (German Research Foundation) under contract number INST 162/291-1 FUGG. We also thank the Pitzer-Foundation for technical support.
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We declare that we have no conflict of interest.
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Alexander C. Langheinrich, Mesut Yeniguen, and Anne Ostendorf contributed equally to the study
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Langheinrich, A.C., Yeniguen, M., Ostendorf, A. et al. In vitro evaluation of the sinus sagittalis superior thrombosis model in the rat using 3D micro- and nanocomputed tomography. Neuroradiology 52, 815–821 (2010). https://doi.org/10.1007/s00234-009-0617-5
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DOI: https://doi.org/10.1007/s00234-009-0617-5