Keywords: fMRI, fMRI
Cerebrovascular reactivity (CVR) is an indicator of cerebrovascular reserve and provides important information about vascular health in a range of brain conditions and diseases. However, current CVR maps often have artifactual bright spots in arterial/venous areas due to the complexity of the BOLD signal mechanism. In this work, we proposed a novel CVR acquisition scheme by adding single-direction or varying-direction crusher gradients to the BOLD sequence. The results demonstrated that these modified sequences could successfully suppress large-vessel artifacts in CVR map.
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