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Diffusion-weighted MR imaging of pyogenic ventriculitis.
John A Pezzullo1, Glenn A Tung, Sanjay Mudigonda
1Department of Diagnostic Imaging, Brown University School of Medicine, Rhode Island Hospital, 593 Eddy St., Providence, RI 02903, USA.
AJR. American Journal of Roentgenology
|December 20, 2002
Summary
Diffusion-weighted MRI can identify pyogenic ventriculitis (ventricular empyema). Restricted water diffusion in purulent fluid, seen as increased signal intensity, aids in diagnosis.
Area of Science:
- Neuroradiology
- Neuroimaging
Background:
- Pyogenic ventriculitis, also known as ventricular empyema or pyocephalus, is a serious intracranial infection.
- Accurate and timely diagnosis is crucial for effective treatment and patient outcomes.
Purpose of the Study:
- To characterize the specific features of pyogenic ventriculitis on diffusion-weighted magnetic resonance (MR) imaging.
- To establish diffusion-weighted imaging (DWI) as a valuable tool for diagnosing this condition.
Main Methods:
- Retrospective analysis of MR imaging studies in patients with suspected pyogenic ventriculitis.
- Focus on diffusion-weighted sequences to evaluate signal intensity and apparent diffusion coefficient (ADC) values of intraventricular fluid.
Main Results:
- Pyogenic ventriculitis demonstrates markedly increased signal intensity of dependent intraventricular fluid on DWI.
- The ADC values of this purulent fluid are significantly lower compared to normal cerebral white matter, indicating restricted water diffusion.
Conclusions:
- Diffusion-weighted MR imaging is highly effective in detecting restricted water diffusion characteristic of purulent material within the ventricles.
- These findings strongly suggest the diagnosis of pyogenic ventriculitis, aiding clinicians in prompt management.