J Korean Soc Radiol.  2009 Aug;61(2):79-85. 10.3348/jksr.2009.61.2.79.

Cerebral Perfusion MR Findings Before and After a Carotid Stent

• Kang M
• Choi JC
• Kwon HJ
• Yoon SK
• Cho JH
• Cha J
• Huh JT
• Choi S

• KMID: 2209042
• DOI: http://doi.org/10.3348/jksr.2009.61.2.79

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

MeSH Terms

Angioplasty
Blood Volume
Brain
Carotid Arteries
Carotid Stenosis
Constriction, Pathologic
Humans
Perfusion
Retrospective Studies
Stents