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Fig. 4
FCR-QPI for measuring the dynamic motions of zebrafish’s heart. Phase images of zebrafish’s heart at (a) 24 hpf and (b) 48 hpf. (c) Periodic signals of the heartbeat at 24 hpf analyzed in time and frequency domains. Periodic signals of the heartbeat at 48 hpf measured at (d-1) atrium (A), (d-2) A-V canal, and (d-3) ventricle (V). (e) Heart rate measured at various hpf.
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Full text @ J. Biomed. Opt.