Brain abscess is a focal bacterial or fungal infection of the brain. Treatment is neurosurgical drainage of pus followed by long-term antibiotic treatment. In spite of successful treatment of the infection, long-term cognitive problems or mental fatigue may ensue. The reason for this dysfunction may be a continuing inflammatory state or damage to brain tissue caused by the abscess. The investigators will evaluate these possibilities with the use of \[18F\]deoxyglucose-positron emission tomography (FDG-PET) and electroencephalography (EEG) in patients who have been treated for brain abscess and who experience cognitive problems and/or fatigue. FDG-PET may identify both inflammation and altered neuronal activity (the latter indicating damage to brain tissue), and EEG may identify altered neuronal activity, including changes in neuronal network activity.
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A change in FDG-PET signal indicating inflammation
Timeframe: When all patients have been followed up for at least 1 year.
A change in FDG-PET signal indicating a change in neuronal activity
Timeframe: When all patients have been followed up for at least 1 year.
A change in EEG activity indicating a change in neuronal activity based on EEG power in alpha, theta, and delta frequencies.
Timeframe: When all patients have been followed up for at least 1 year.