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. 2020 Jun 18;11(7):3795–3817. doi: 10.1364/BOE.394835

Fig. 2.

Fig. 2.

Illustration of the system structure of 4D-OCE phase velocity. The left side displays the SD-OCT scanner and ultrasound system to generate ARF. Three function generators were used to manage all signals for the whole system including ultrasound excitation signals (blue lines) and trigger signals for synchronizing all instruments (purple lines). The right side illustrates the customized 4D-OCE scan pattern.