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Fig. 1. —Line drawing shows real-time duplex flow-evaluation sequence, consisting of two-dimensional spatial radiofrequency (RF) excitation pulse, followed by bipolar flow-encoding and echoplanar readout gradient pulses. Note that during selective RF pulse, slice and phase-encoding gradients are applied to select column that subsequently can be encoded with few phase-encoding steps and without aliasing. AQ = Acquisition, G_R = readout gradient, G_p = phase-encoding gradient, G_s = slice select gradient.

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