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Perfusion and thallium single photon emission computed tomography in herpes simplex encephalitis
P P De Deyn1, P W Van den Broucke, B A Pickut
1Department of Neurology, General Hospital Middelheim, Antwerp, Belgium.
Journal of the Neurological Sciences
|May 26, 1998
Summary
This study introduces 201thallium-single photon emission computed tomography (201Tl-SPECT) for herpes simplex encephalitis (HSE). Findings suggest distinct pathophysiological differences in HSE lesions, observed via 201Tl-SPECT, 99mTc-HMPAO perfusion SPECT, and MRI.
Area of Science:
- Neurology
- Nuclear Medicine
- Radiology
Background:
- Herpes simplex encephalitis (HSE) is a severe neurological condition.
- Accurate imaging is crucial for diagnosing and understanding HSE pathology.
- Conventional imaging techniques include MRI and 99mtechnetium hexamethylpropylene amine oxime (99mTc-HMPAO) perfusion SPECT.
Observation:
- This report details the first use of 201thallium-single photon emission computed tomography (201Tl-SPECT) in a patient with HSE.
- 201Tl-SPECT findings were correlated with 99mTc-HMPAO perfusion SPECT and magnetic resonance imaging (MRI).
Findings:
- 99mTc-HMPAO perfusion SPECT showed hyperperfusion in the right temporal and parietal lobes, with ipsilateral occipital hypoperfusion.
- 201Tl-SPECT revealed uptake in the right temporal lobe, consistent with MRI gadolinium enhancement.
- The right occipital lesion, evident on MRI and 99mTc-HMPAO SPECT, was not detected by 201Tl-SPECT.
Implications:
- The differing observations between 201Tl-SPECT and 99mTc-HMPAO perfusion SPECT suggest potential pathophysiological variations in HSE lesions.
- 201Tl-SPECT may offer complementary information to other imaging modalities in HSE.
- Further research is warranted to explore the utility of 201Tl-SPECT in HSE.