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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2022 May 26;69(6):1994–2000. doi: 10.1109/TUFFC.2022.3164371

Fig. 2. Scissors cuts RF data for synchronization.

Fig. 2

a) Synchronization in less than 16 ns. RF data collected before laser pulse are cut away. Each grid represents one digital-converted RF data collected by one element, and it takes 16 ns for 62.5 MHz sampling rate. Lateral axis represents the element index and axial axis represents time. b) Higher-level synchronization in less than 4 ns. Laser pulse is delayed by delaying its Q-switch trigger in steps of 4 ns until it synchronizes with the second row of RF data. The first row is cut away. c) Flow chart of sequence programming of one frame with Scissors and Vantage UOP system. Ultrasound imaging and PA imaging are conducted independently and sequentially. Scissors cut the RF data in PA receive buffer and put it into a PA dummy buffer for reconstruction.