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Serial transcranial Doppler (TCD) spectra and intracranial pressure (ICP) monitoring in a patient with encephalitis. TCD performed on day 2 shows a high resistance Doppler spectra [note the pulsatility index (PI) as 1.46]. Clinical improvement in this patient was associated with reduction of ICP (16 cm of water) and normalization of TCD-derived PI to 1.12
