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Contrast-enhanced FLAIR in the early diagnosis of infectious meningitis

Alesssandra Splendiani1, Edoardo Puglielli, Rosanna De Amicis

  • 1Department of Radiology, University of L'Aquila, Ospedale S. Salvatore-Coppito, 67100 L'Aquila, Italy. istradiolaq@cc.univaq.it

Neuroradiology
|July 22, 2005
PubMed

Insights

Gadolinium-enhanced MRI with FLAIR sequences accurately detects early infectious meningitis. This advanced MRI technique is crucial for rapid and reliable diagnosis when meningitis is suspected.

Area of Science:

  • Radiology
  • Neurology
  • Infectious Diseases

Background:

  • Early diagnosis of infectious meningitis is critical for timely treatment and improved patient outcomes.
  • Conventional MRI sequences may have limitations in detecting subtle early signs of meningeal inflammation.

Purpose of the Study:

  • To evaluate the accuracy of Magnetic Resonance Imaging (MRI) in the early diagnosis of infectious meningitis.
  • To specifically assess the diagnostic value of the gadolinium-enhanced fluid-attenuated inversion recovery (FLAIR) sequence.

Main Methods:

  • Twenty-seven patients with suspected infectious meningitis underwent MRI within 3 hours of clinical evaluation.
  • MRI protocols included T1-weighted spin-echo, dual-echo T2-weighted fast-spin-echo, and FLAIR sequences, both pre- and post-gadolinium contrast administration.
  • Final diagnosis was confirmed by clinical findings and cerebrospinal fluid analysis.

Main Results:

  • Infectious meningitis was confirmed in 12 patients.
  • Gadolinium-enhanced FLAIR MRI demonstrated abnormal meningeal enhancement in all 12 confirmed cases.
  • Unenhanced FLAIR and gadolinium-enhanced T1-weighted spin-echo sequences showed lower sensitivity (4/12 and 6/12, respectively).

Conclusions:

  • Gadolinium-enhanced FLAIR MRI is a highly accurate tool for the early detection of infectious meningitis.
  • This MRI technique offers superior sensitivity compared to unenhanced sequences and standard enhanced T1-weighted imaging.
  • Incorporating gadolinium-enhanced FLAIR sequences into MRI protocols can significantly improve early screening for infectious meningitis.

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