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Three-dimensional pseudo-continuous arterial spin labeling assessment of imaging progress in acute ischemic stroke with unilateral middle cerebral artery stenosis / 中国医学影像技术
Chinese Journal of Medical Imaging Technology ; (12): 41-45, 2019.
Article in Chinese | WPRIM | ID: wpr-861488
ABSTRACT
Objective To assess the value of three-dimensional pseudo-continuous arterial spin labeling(3D-pcASL)in assessment of imaging progress in acute ischemic stroke with unilateral middle cerebral artery (MCA) stenosis. Methods MRI data of 31 patients of acute ischemic stroke with unilateral MCA stenosis were analyzed retrospectively. According to the whole brain DWI characteristics at the time of admission and within 7 days after admission, the patients were divided into progressive group (n=20) and non-progressive group (n=11). 3D-pcASL with post-labeling delay (PLD) of 1.5 s and 2.5 s were performed. The value of blood flow of collateral circulation (ΔCBF) in bilateral (involved side and healthy side) brain regions,including frontal, parietal, temporal and occipital cortices, anterior watershed, internal watershed, posterior watershed and basal ganglia were measured and compared between 2 groups. ROC curve was used to evaluate the efficacy of each region's ΔCBF at involved side in diagnosis of imaging progress of acute ischemic stroke with unilateral MCA stenosis. Results Progress group had significantly lower ΔCBF value in the posterior watershed of both sides compared with non-progressive group (both P<0.05). The area under ROC curve (AUC) of ΔCBF value in posterior watershed at involved side was 0.750, the sensitivity and specificity was 0.85 and 0.64, while in internal watershed were 0.709, 0.95 and 0.55, respectively. Conclusion 3D-pcASL can estimate the compensatory status of collateral circulation in acute ischemic stroke patients with unilateral MCA stenosis, being helpful to early diagnosis of imaging progress of acute ischemic stroke.

Full text: Available Index: WPRIM (Western Pacific) Type of study: Prognostic study / Screening study Language: Chinese Journal: Chinese Journal of Medical Imaging Technology Year: 2019 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Type of study: Prognostic study / Screening study Language: Chinese Journal: Chinese Journal of Medical Imaging Technology Year: 2019 Type: Article