Figure 1.
(a) Photoacoustic maximum-amplitude projection images of HEK-293 cells demonstrate photoacoustic signal changes due to cell membrane voltage changes. (b) Fractional photoacoustic signal change versus cell membrane resting voltage changes.
(a) Photoacoustic maximum-amplitude projection images of HEK-293 cells demonstrate photoacoustic signal changes due to cell membrane voltage changes. (b) Fractional photoacoustic signal change versus cell membrane resting voltage changes.