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KMID : 1103720090610020079
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Journal of the Korean Society of Radiology
2009 Volume.61 No. 2 p.79 ~ p.85
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Cerebral Perfusion MR Findings Before and After a Carotid Stent
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Choi Jong-Cheol
Kang Myung-Jin
Kwon Hee-Jin
Yoon Seong-Kuk
Cho Jin-Han
Cha Jae-Kwan
Huh Jae-Taek
Choi Sun-Seob
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Abstract
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Purpose: To assess the utility cerebral perfusion MR in the identification of changes in the findings before and after a stent-assisted angioplasty in cases of severe symptomatic carotid stenosis.
Materials and Methods : Twenty-three patients with symptomatic high grade ICA stenosis underwent cerebral perfusion MR imaging before and after carotid stent placement. The time to peak (ΔTTP) and cerebral blood volume (%CBV) were retrospectively calculated before and after stenting in each hemisphere, as well as between the vascular enhancing group and non-vascular enhancing group on contrast-enhanced T1-weighted images before stenting. As well, the prestent ΔTTP was compared with the stenosis degree for each case.
Results: The value of ΔTTP decreased significantly after stenting, while the difference of the prestent ΔTTP between the vascular enhancing group and non-vascular enhancing group was also statistically significant (p<0.05). However, no significant differences or changes in %CBV were identified after stenting both between the vascular and non-vascular enhancing group and for the degree of carotid stenosis. The value of ΔTTP before stenting was positively correlated (r=0.472) to the degree of carotid stenosis (p<0.05).
Conclusion: The MR perfusion supports improved perfusion status of the brain after a stent-assisted angioplasty in cases of severe carotid stenosis.
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KEYWORD
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Carotid arteries, Carotid stenosis, Brain, Magnetic resonance (MR), Perfusion study
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