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Insights Into the Pathophysiology of Neurovascular Uncoupling in Patients With Brain Lesions.

Sponsor: Erasme University Hospital • ClinicalTrials.gov ID: NCT06797661

Registry updated: 2026-09-14

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Description

Neurovascular uncoupling (NVU) represents a major source of potential bias for the identification of eloquent brain regions through activation procedures in blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI). Same region shows proper pattern in glucose metabolism in victiny of brain lesions, investigated with positron emitted tomography with radiolabeled glucose (PET-FDG) This research project aims at investigating the mechanisms of NVU by using a multimodal noninvasive imaging approach in neurosurgical patients.

Interventions

Functional MRI (Diagnostic test)
11 minutes of Functional MRI alternating breathing Air-Room and gaz mix (5%CO2 21%O2 74%N2). All procedure are acquired simultaneously on a single acquisition on the PET/MRI camera in the institution.
FDG-PET (Diagnostic test)
Some patients who did not benefit from a FDG-PET in their clinical evaluation or more than 1 month before the inclusion in the present study will be ask to also undergo a brain FDG-PET , the dose is set at 2 Mega becquerel per Kg. All procedure are acquired simultaneously on a single acquisition on the PET/MRI camera in the institution.
Structural MRI (Diagnostic test)
Patient will benefit Different anatomical sequence of acquisition listed here : T1 , T1 with contrast agent (gadovist) , T2 flair , T2 and DSC (Dynamic susceptibility contrast) , and Time Of Flight . All procedure are acquired simultaneously on a single acquisition on the PET/MRI camera in the institution.

Eligibility criteria

Inclusion Criteria: * patients in the study include prior imaging showing a potentially resectable intra-cerebral mass lesion. Patient has to be included before surgery, chemotherapy and radiation Exclusion Criteria: * previous brain surgery * respiratory failure * Asthma * Claustrophobia * Previous adverse reaction to gadovist (contrast agent) * Pregnancy and Breath feeding * Diabetes (type I and II)

Conditions

Glioblastoma Glioma Astrocytoma

Locations

HUB-Erasme Hospital — Brussels, Belgium

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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

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