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Arterial spin labeling imaging correlates with the angiographic and clinical vascularity of vestibular schwannomas
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Arterial spin labeling imaging correlates with the angiographic and clinical vascularity of vestibular schwannomas
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Arterial spin labeling imaging correlates with the angiographic and clinical vascularity of vestibular schwannomas
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Journal Article
Arterial spin labeling imaging correlates with the angiographic and clinical vascularity of vestibular schwannomas
2020
Overview
Purpose
Hypervascular vestibular schwannomas (HVSs) are a type of the vestibular schwannomas (VSs) that are extremely difficult to remove. We examined whether HVSs can be predicted by using arterial spin labeling (ASL) imaging.
Methods
A total of 103 patients with VSs underwent ASL imaging and digital subtraction angiography (DSA) before surgery. Regional cerebral blood flow (CBF) of gray matter and regional tumor blood flow (TBF) were calculated from ASL imaging, and we defined the ratio of TBF to CBF as the relative TBF (rTBF = TBF/CBF). Angiographic vascularity was evaluated by DSA, and clinical vascularity was evaluated by the degree of intraoperative tumor bleeding. Based on the angiographic and clinical vascularity, the VSs were divided into two categories: HVS and non-HVS. We compared rTBF with angiographic and clinical vascularities, retrospectively.
Results
The mean rTBFs of angiographic non-HVSs and HVSs were 1.29 and 2.58, respectively (
p
< 0.0001). At a cutoff value of 1.55, the sensitivity and specificity were 93.9% and 72.9%, respectively. The mean rTBFs of clinical non-HVS and HVSs were 1.45 and 2.22, respectively (
p
= 0.0002). At a cutoff value of 1.55, the sensitivity and specificity were 79.4% and 66.7%, respectively.
Conclusion
The rTBF calculated from ASL imaging correlates well with tumor vascularity and may be useful for predicting HVSs before surgery.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
