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Abstract #0877

Hemodynamic imaging parameters in brain metastases patients – Agreement between multi-delay ASL and hypercapnic BOLD

Eva Elisabeth van Grinsven1, Marielle Philippens2, Jeroen Siero3,4, and Alex Bhogal3
1Department of Neurology & Neurosurgery, UMC Utrecht, Utrecht, Netherlands, 2Department of Radiation Oncology, UMC Utrecht, Utrecht, Netherlands, 3Department of Radiology, UMC Utrecht, Utrecht, Netherlands, 4Spinoza Center for Neuroimaging, Amsterdam, Netherlands

Synopsis

Keywords: Blood vessels, NeuroscienceThis study compared baseline ASL with BOLD cerebrovascular reactivity (BOLD-CVR) parameters in the brain under different hemodynamic circumstances in patients with brain metastases. There was a strong relationship between baseline cerebral blood flow and BOLD-CVR measurements and the temporal metrics of ASL and BOLD-CVR. However, the relationship between baseline ASL and BOLD-CVR does not hold in tissue with exhausted cerebral autoregulation (i.e. vascular steal regions). Thereby, BOLD-CVR may be able to flag at-risk areas with depleted vascular reserve capacity before they become visible on ASL MRI.

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