Published in:
01-08-2021 | Stroke | Neuro
Quantitative susceptibility-weighted imaging may be an accurate method for determining stroke hypoperfusion and hypoxia of penumbra
Authors:
Xiudi Lu, Linglei Meng, Yongmin Zhou, Shaoshi Wang, Miller Fawaz, Meiyun Wang, E. Mark Haacke, Chao Chai, Meizhu Zheng, Jinxia Zhu, Yu Luo, Shuang Xia
Published in:
European Radiology
|
Issue 8/2021
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Abstract
Objectives
To quantitatively evaluate the volume of the ischemic penumbra using susceptibility-weighted imaging and mapping (SWIM) of asymmetrical prominent cortical veins (APCVs) in patients with acute ischemic stroke.
Methods
Eighty-five eligible patients with acute ischemic stroke on admission within 12 h from symptom onset were studied. The APCVs on SWIM were quantitatively (SWI-volume) and semi-quantitatively (SWI-Alberta Stroke Program Early CT Score, SWI-ASPECTS) evaluated to calculate mismatch. To assess the diagnostic efficacy of APCVs on SWIM, comparative analyses were performed between SWIvolume-DWI mismatch and SWIASPECTS-DWI mismatch, using PWI-DWI mismatch as a reference. Correlations were calculated between the mismatches, as well as between SWI-volume and time-to-maximum (Tmax) > 6 s volume. Additionally, each of these mismatches was correlated with the National Institute of Health Stroke Scale (NIHSS).
Results
The sensitivity, negative predictive value, and accuracy of SWIvolume-DWI mismatch were demonstrably higher than SWIASPECTS-DWI mismatch (100% vs. 53.7%, 100% vs. 9.5%, 97.7% vs. 54.5%, respectively). A significant positive correlation was found between SWIvolume-DWI and PWI-DWI mismatch (r = 0.691, p < 0.01), as well as between SWI-volume and Tmax > 6 s volume (r = 0.786, p < 0.001). A significant negative correlation was found between SWIvolume-DWI mismatch and NIHSS (r = − 0.360, p = 0.022), as well as between SWIASPECTS-DWI mismatch and NIHSS (r = − 0.499, p = 0.001).
Conclusions
SWIvolume-DWI mismatch had higher diagnostic efficacy than SWIASPECTS-DWI mismatch in defining the ischemic penumbra and showed good consistency with PWI-DWI mismatch in acute ischemic stroke. Quantitation of APCVs using SWIM provided an accurate method for determining hypoperfusion and provided a reliable method to reflect the hypoxia of penumbra.
Key Points
• SWI
volume
-DWI mismatch has higher diagnostic efficacy than SWI
ASPECTS
-DWI mismatch in defining the ischemic penumbra.
• SWI
volume
-DWI mismatch shows good consistency with PWI-DWI mismatch in managing penumbra in acute ischemic stroke.
• Quantitation of APCV volume using SWIM provided an accurate method for determining the hypoperfusion area and provided a reliable method to reflect the hypoxia of penumbra.