Fast Fourier Transformation of EEG Data
To the Editor.—
Several opinions expressed by the Diagnostic and Therapeutic Technology Assessment (DATTA) panel on the subject of intraoperative quantitative EEG monitoring1 might be considered controversial. The actual technique, Fast Fourier transform (FFT) of EEG data, is not per se a quantification of EEG data but merely a reformatting of data into component frequencies. This transformation is useful because many pathological EEG patterns produce spectral patterns that can be...