Advanced Magnetic Resonance Imaging Techniques in Tuberculous Meningitis

Area of Science:

• Neurology
• Radiology
• Infectious Diseases

Background:

• Tuberculous meningitis (TBM) is a severe form of tuberculosis with significant neurological impact.
• Conventional neuroradiology in TBM management primarily focuses on diagnosis and complication monitoring.
• Early detection of TBM sequelae such as vasculitis and hydrocephalus remains a clinical challenge.

Purpose of the Study:

• To evaluate the utility of advanced magnetic resonance imaging (MRI) techniques for early detection of TBM sequelae.
• To identify specific MRI findings indicative of vasculitis and hydrocephalus in TBM patients.

Main Methods:

• A prospective observational study involving 30 TBM patients (18-45 years) over one year.
• Serial brain MRI scans were performed on recruited patients.
• Advanced MRI techniques, including diffusion tensor imaging and magnetization transfer imaging, were employed.

Main Results:

• Basal/Sylvian exudates observed in 90% of patients; hydrocephalus in 30%; infarcts in 27%.
• Significantly reduced cerebral blood flow (CBF) in the basal ganglia of TBM patients compared to controls (P < 0.05).
• Diffusion tensor imaging parameters showed abnormalities in infarct regions, with some normalization over time.

Conclusions:

• Advanced MRI techniques, particularly magnetization transfer imaging, aid in visualizing meningeal thickening.
• Reduced CBF in the basal ganglia is an identifiable marker in TBM using advanced MRI.
• Advanced MRI shows promise in the early detection and characterization of TBM-related neurological damage.