Partial echo imaging is widely used in angiography to shorten the echo time and reduce flow-induced signal loss. However, sampling only an asymmetric part of k-space basically ignores high-frequency phase and thus causes signal alteration as well. In the present work, bipolar partial echo imaging is introduced to cover the full k-space sparsely with a Cartesian partial echo measurement. It involves reversing the polarity of the readout gradient during the acquisition and recovering missing data in the reconstruction without assuming smoothness of the phase. The potential of bipolar partial echo imaging is demonstrated in phantom and first volunteer experiments.
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