Fig. 2: Preoperative tongue cancer localization.
From: Gustatory interface for operative assessment and taste decoding in patients with tongue cancer
a Photograph of 256-channel tongue electrodes well-attached to the soft tongue surface. b Simulation of the normalized total energy of the system with the flexible tongue electrodes (20 μm thickness) laminated on the tongue. Global minima are highlighted with red dots. c Histogram of electrode impedance (at 1 kHz frequency) for the 256-channel tongue electrodes in (a). Inset: Spatial distribution of the impedance magnitude with respect to actual channel positions. d Preoperative CT image of the tongue from a patient with tongue cancer. The gray dots mark the positions of the 256 electrode channels. The waveform map of the cancer central site and a small area around it (black dashed box) is highlighted at the bottom. e, f Representative TE signals and time-frequency spectra from the normal site (e) and the cancer site (f). g Power spectral densities of TE signals from several channels in the cancer and normal sites in the 10–500 Hz range. Data are presented as mean values +/− SD. h Power heatmap of the black dashed box in (d), with the cancer central site indicated by the dark star.
