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Hemodynamic assessment of vascular malformations by angio CT with generation of functional transit time images
A Bartolini1, B Gasparetto, G Ajmar
1Institute of Clinical Neurology, University of Genoa, Italy.
Insights
This study used CT dynamic imaging to assess vascular malformations by measuring regional arm-brain circulation time (rABCT). Results indicate rABCT changes detect lesions and reveal impaired brain perfusion in some patients.
Area of Science:
- Neuroradiology
- Vascular Imaging
- Hemodynamics
Background:
- Vascular malformations pose diagnostic challenges.
- Accurate hemodynamic assessment is crucial for understanding lesion impact.
Purpose of the Study:
- To evaluate the utility of CT dynamic studies and regional arm-brain circulation time (rABCT) imaging.
- To characterize hemodynamic conditions in patients with vascular malformations.
Main Methods:
- Performed CT dynamic studies with iodinated contrast in 11 patients.
- Generated regional arm-brain circulation time (rABCT) images.
- Compared lesion rABCT with normal arterial and venous values.
Main Results:
- All vascular malformations were detected via rABCT changes.
- Hemodynamic conditions of lesions were deduced.
- Seven patients exhibited altered rABCT distribution, suggesting impaired perfusion reserve.
Conclusions:
- CT dynamic studies and rABCT imaging effectively detect vascular malformations.
- rABCT analysis provides insights into lesion hemodynamics and potential perfusion deficits.
Abstract:
We performed a CT dynamic study during the first pass of an intravenously injected bolus of a iodinated contrast medium, followed by generation of the regional arm-brain circulation time (rABCT) image, in 11 patients with vascular malformations. All lesions could be detected as changes of rABCT, and the comparison with values of normal arteries and veins allowed the deduction of the hemodynamic conditions of the lesions. Seven cases showed evidence of altered distribution of rABCT in the corresponding brain hemisphere, suggesting a perfusion reserve impairment.