Comparative study of DSC-PWI and 3D-ASL in ischemic stroke patients.
10.1007/s11596-015-1529-8
- Author:
Shui-xia ZHANG
1
;
Yi-hao YAO
2
;
Shun ZHANG
2
;
Wen-jie ZHU
2
;
Xiang-yu TANG
2
;
Yuan-yuan QIN
2
;
Ling-yun ZHAO
2
;
Cheng-xia LIU
2
;
Wen-zhen ZHU
3
Author Information
1. Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. 154954387@qq.com.
2. Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
3. Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. zhuwenzhen@hotmail.com.
- Publication Type:Journal Article
- Keywords:
dynamic susceptibility contrast-enhanced perfusion weighted imaging;
ischemic stroke;
three dimensional arterial spin labeling
- MeSH:
Brain Ischemia;
metabolism;
Humans;
Magnetic Resonance Angiography;
Retrospective Studies;
Stroke;
metabolism
- From:
Journal of Huazhong University of Science and Technology (Medical Sciences)
2015;35(6):923-927
- CountryChina
- Language:English
-
Abstract:
The purpose of this study was to quantitatively analyze the relationship between three dimensional arterial spin labeling (3D-ASL) and dynamic susceptibility contrast-enhanced perfusion weighted imaging (DSC-PWI) in ischemic stroke patients. Thirty patients with ischemic stroke were included in this study. All subjects underwent routine magnetic resonance imaging scanning, diffusion weighted imaging (DWI), magnetic resonance angiography (MRA), 3D-ASL and DSC-PWI on a 3.0T MR scanner. Regions of interest (ROIs) were drawn on the cerebral blood flow (CBF) maps (derived from ASL) and multi-parametric DSC perfusion maps, and then, the absolute and relative values of ASL-CBF, DSC-derived CBF, and DSC-derived mean transit time (MTT) were calculated. The relationships between ASL and DSC parameters were analyzed using Pearson's correlation analysis. Receiver operative characteristic (ROC) curves were performed to define the thresholds of relative value of ASL-CBF (rASL) that could best predict DSC-CBF reduction and MTT prolongation. Relative ASL better correlated with CBF and MTT in the anterior circulation with the Pearson correlation coefficients (R) values being 0.611 (P<0.001) and-0.610 (P<0.001) respectively. ROC curves demonstrated that when rASL ≤0.585, the sensitivity, specificity and accuracy for predicting ROIs with rCBF<0.9 were 92.3%, 63.6% and 76.6% respectively. When rASL ≤0.952, the sensitivity, specificity and accuracy for predicting ROIs rMTT>1.0 were 75.7%, 89.2% and 87.8% respectively. ASL-CBF map has better linear correlations with DSC-derived parameters (DSC-CBF and MTT) in anterior circulation in ischemic stroke patients. Additionally, when rASL is lower than 0.585, it could predict DSC-CBF decrease with moderate accuracy. If rASL values range from 0.585 to 0.952, we just speculate the prolonged MTT.
