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Radiotracer Administration for High Temporal Resolution Positron Emission Tomography of the Human Brain: Application to FDG-fPET
Published on: October 22, 2019
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Dynamic FDG-PET in localization of focal epilepsy: A pilot study
Vikram Seshadri1, Katherine A Zarroli2, Robert S Schetlick3
1Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, USA.
Epilepsy & Behavior : E&B
|July 26, 2021
Summary
Dynamic FDG-PET imaging identified abnormal metabolism in epilepsy patients where standard PET scans showed none. This technique may improve seizure focus localization for epilepsy surgery.
Area of Science:
- Neuroimaging
- Nuclear Medicine
- Epileptology
Background:
- Epilepsy surgery is underutilized due to inadequate non-invasive seizure focus localization methods.
- Standard static fluorodeoxyglucose-positron emission tomography (FDG-PET) can miss subtle metabolic abnormalities.
Purpose of the Study:
- To evaluate the utility of dynamic FDG-PET (dFDG-PET) for localizing hypometabolic foci in epilepsy patients with normal static PET scans.
- To assess if glucose dynamics offer improved localization compared to standard static PET techniques.
Main Methods:
- Acquired simultaneous EEG and high-resolution dFDG-PET brain images over one hour in seven epilepsy patients.
- Corrected images for attenuation, motion, and partial volume effects, co-registering with MRI.
- Segmented images into 18 regions of interest per hemisphere and identified hypometabolic foci using z-scores.
Main Results:
- dFDG-PET identified focal regions of altered metabolism in all patients.
- These abnormalities were not detected by standard clinical static FDG-PET.
- Hypometabolic foci were identified using parametric quantification and z-score analysis.
Conclusions:
- Dynamic FDG-PET shows promise for detecting subtle metabolic changes in epilepsy.
- This advanced imaging technique may enhance the localization of epileptic foci.
- Further research is warranted to confirm the clinical utility of dFDG-PET over static methods.
