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[MR imaging of the meninges: normal and pathological findings]
W Schörner1, H Henkes, B Sander
1Radiologische Klinik und Poliklinik, Freie Universität Berlin.
Abstract:
The MR appearance of normal and pathological meninges was studied in 23 patients. Amongst twelve normals, T1-weighted images demonstrated the meninges as slightly hyperintense density structures (compared with CSF) which increased in signal intensity somewhat after the administration of gadolinium-DTPA. On T2-weighted images, the subarachnoid space and meninges were isointense. In eleven patients with inflammatory disease or tumourous infiltration of the meninges, abnormal findings were evident in the unenhanced images as well as after administration of gadolinium-DTPA. Compared with CT, MR proved greatly superior in the diagnosis of meningeal abnormalities.
Insights
Magnetic Resonance (MR) imaging effectively visualizes meninges, showing subtle signal changes in normal cases and clear abnormalities in inflammatory or tumorous conditions. MR imaging surpasses CT for diagnosing meningeal abnormalities.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Context:
- The meninges, protective membranes surrounding the brain and spinal cord, can be affected by various pathologies.
- Accurate visualization of meningeal abnormalities is crucial for timely diagnosis and treatment.
- Conventional imaging techniques may have limitations in depicting subtle meningeal changes.
Purpose:
- To evaluate the utility of Magnetic Resonance (MR) imaging in characterizing the appearance of normal and pathological meninges.
- To compare the diagnostic performance of MR imaging with Computed Tomography (CT) for meningeal abnormalities.
Summary:
- This study investigated the MR imaging features of meninges in 23 patients, including 12 healthy individuals and 11 with meningeal pathology.
- In normal subjects, T1-weighted MR images showed slightly hyperintense meninges, enhancing after gadolinium-DTPA administration. T2-weighted images revealed isointensity.
- Pathological meninges, due to inflammation or tumors, exhibited evident abnormalities on both unenhanced and enhanced MR images, demonstrating MR's superior sensitivity over CT.
Impact:
- MR imaging offers superior diagnostic capability for meningeal abnormalities compared to CT.
- This enhances the ability to detect and differentiate between various meningeal diseases.
- Improved diagnostic accuracy can lead to better patient management and outcomes in neurological conditions affecting the meninges.