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Improved sensitivity of MRI in multiple sclerosis by use of extensive standardized procedures
F L Van de Vyver1, L Truyen, J Gheuens
1Research Group for Biomedical NMR, University of Antwerp, Belgium.
Abstract:
The relative value of two different MRI procedures for the assessment of infratentorial extension in multiple sclerosis (MS) was studied. Multislice spin-echo techniques were used overall. Procedure A consisted of parasagittal T1-weighted images (500/30) and axial T2-weighted images (2500/30, 2500/120). Procedure B consisted of parasagittal T2-weighted images (1600/35, 1600/90). In the parasagittal T2-weighted images clear visualization of MS lesions is achieved because signal intensities of CSF and normal nervous tissue are nearly identical. All images were performed with a 0.5 Tesla MR system. Data were obtained in 98 patients with definite (N = 30) or probable MS (N = 68). Areas with abnormal signal intensity in the infratentorial regions (brainstem, cerebellum, and/or cervical spinal cord) were identified in 44% of the patients with procedure A and in 64% with procedure B. The standard application of the combination of both procedures improves the sensitivity of the MR examination for the diagnosis of MS, the delineation of infratentorial lesions and the correlation between clinical and MR data without excessively increasing imaging time.
Insights
Procedure B, using parasagittal T2-weighted images, better detects infratentorial lesions in multiple sclerosis (MS) than Procedure A. Combining both MRI procedures enhances diagnostic sensitivity for MS infratentorial abnormalities.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Multiple sclerosis (MS) diagnosis relies on identifying lesions throughout the central nervous system.
- Infratentorial lesions in the brainstem, cerebellum, and spinal cord are crucial for MS diagnosis but can be challenging to visualize.
- Standard MRI protocols may have limitations in detecting these specific lesions.
Purpose of the Study:
- To compare the effectiveness of two different magnetic resonance imaging (MRI) procedures for assessing infratentorial lesions in multiple sclerosis (MS).
- To determine which MRI technique offers superior visualization and detection of MS-related abnormalities in the infratentorial region.
- To evaluate the combined utility of MRI procedures for improving MS diagnosis and clinical correlation.
Main Methods:
- Utilized multislice spin-echo MRI techniques on a 0.5 Tesla system.
- Procedure A involved parasagittal T1-weighted and axial T2-weighted imaging.
- Procedure B employed parasagittal T2-weighted imaging, which offers better contrast between cerebrospinal fluid and nervous tissue for lesion detection.
Main Results:
- Abnormal signal intensities in infratentorial regions were identified in 44% of patients using Procedure A.
- Procedure B identified infratentorial lesions in 64% of patients, demonstrating higher sensitivity.
- The combination of both procedures significantly improved lesion detection and diagnostic accuracy.
Conclusions:
- Parasagittal T2-weighted imaging (Procedure B) is more sensitive for detecting infratentorial lesions in MS.
- Combining both MRI procedures enhances the overall sensitivity for MS diagnosis and infratentorial lesion delineation.
- Integrated MRI protocols improve the correlation between clinical findings and imaging data without substantially increasing examination time.