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J Korean Soc Radiol. 2009 Aug;61(2):79-85. Korean. Original Article. https://doi.org/10.3348/jksr.2009.61.2.79
Kang M , Choi JC , Kwon HJ , Yoon SK , Cho JH , Cha J , Huh JT , Choi S .
Department of Radiology, College of Medicine, Dong-A University, Korea. myong69@dau.ac.kr
Department of Neurology, College of Medicine, Dong-A University, Korea.
Department of Neurosurgery, College of Medicine, Dong-A University, Korea.
Abstract

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 (deltaTP) 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 deltaTP was compared with the stenosis degree for each case. RESULTS: The value of deltaTP decreased significantly after stenting, while the difference of the prestent deltaTP 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 deltaTP 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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