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Transmantle pressure under the influence of free breathing: non-invasive quantification of the aqueduct pressure gradient in healthy adults.
Fluids Barriers CNS
January 2025
Medical Image Processing Department, CHU Amiens-Picardie University Hospital, Amiens, France.
Background: The pressure gradient between the ventricles and the subarachnoid space (transmantle pressure) is crucial for understanding CSF circulation and the pathogenesis of certain neurodegenerative diseases. This pressure can be approximated by the pressure difference across the aqueduct (ΔP). Currently, no dedicated platform exists for quantifying ΔP, and no research has been conducted on the impact of breathing on ΔP.
View Article and Find Full Text PDFDifferent Glymphatic Kinetics in Spontaneous Intracranial Hypotension.
AJNR Am J Neuroradiol
October 2024
From the Departments of Neuroradiology (H.U., I.E.D.K., C.Z., L.B., E.K., A.R., N.L.), Medical Center-University of Freiburg, Freiburg, Germany.
Background And Purpose: The glymphatic (glia-lymphatic) system is a paravascular pathway for the clearance of waste metabolites including amyloid β from the brain. Serial T1 relaxation time measurements after the intrathecal injection of gadolinium-based contrast agents facilitate the analysis of the temporal dynamics that may be different in patients with spontaneous intracranial hypotension (SIH) and those without SIH.
Materials And Methods: 3D T1-weighted magnetization-prepared 2 rapid gradient echo sequences were acquired in 4 patients with SIH with proved CSF leaks and 12 patients without SIH before, 2-4, 6-8, and 24-48 hours after intrathecal gadobutrol injection.
Preliminary investigations into human neurofluid transport using multiple novel non-contrast MRI methods.
J Cereb Blood Flow Metab
December 2024
VISN 20 Mental Illness Research, Education, and Clinical Center, Veterans Affairs Puget Sound Healthcare System, Seattle, WA, USA.
We discuss two potential non-invasive MRI methods to study phenomena related to subarachnoid cerebrospinal fluid (CSF) motion and perivascular fluid transport, and their association with sleep and aging. We apply diffusion-based intravoxel incoherent motion (IVIM) imaging to evaluate pseudodiffusion coefficient, , or CSF movement across large spaces like the subarachnoid space (SAS). We also performed perfusion-based multi-echo, Hadamard encoded arterial spin labeling (ASL) to evaluate whole brain cortical cerebral blood flow (CBF) and trans-endothelial exchange () of water from the vasculature into the perivascular space and parenchyma.
View Article and Find Full Text PDFMagnetic resonance imaging findings in central nervous system tuberculosis: A pictorial review.
Heliyon
April 2024
Resident PGY-1 Pathology, Department of Pathology, Bir Hospital, Kathmandu, Nepal.
Central nervous system (CNS) tuberculosis is a post-primary form of tuberculosis. It has high mortality and morbidity rates despite early diagnosis and treatment. CNS tuberculosis can manifest as subacute/chronic meningitis, parenchymal tuberculous lesions, and spinal tuberculosis.
View Article and Find Full Text PDFImproved Detection of Target Metabolites in Brain Tumors with Intermediate TE, High SNR, and High Bandwidth Spin-Echo Sequence at 5T.
AJNR Am J Neuroradiol
April 2024
From the Department of Radiology (W.S., H.L., H.X.), Zhongnan Hospital of Wuhan University, Wuhan, Hubei, P.R. China
Background And Purpose: Due to high chemical shift displacement, challenges emerge at ultra-high fields when measuring metabolites using H-MRS. Our goal was to investigate how well the high SNR and high bandwidth spin-echo (HISE) technique perform at 5T for detecting target metabolites in brain tumors.
Materials And Methods: Twenty-six subjects suspected of having brain tumors were enrolled.
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