Method and magnetic resonance apparatus for quiet echo-planar imaging
Abstract:
In a method and magnetic resonance (MR) apparatus for echo-planar acquisition of MR images using multiple reception coils, an RF excitation pulse is radiated to generate transverse magnetization, and a temporal sequence of a readout gradient is activated with alternating positive and negative values, thereby producing MR signal echoes. Multiple phase-encoding gradients are activated in a temporal sequence with a value of the phase-encoding gradients being maximum when a value of the readout gradients is minimum, and vice versa. A time period during which a single phase-encoding gradient is applied is at least a quarter of a time interval between two MR signal echoes. The MR signal echoes are read with the multiple reception coils in a trajectory in k-space, continuously without interruption during the readout gradient. The trajectory does not completely fill k-space with raw data in an edge region according to the Nyquist condition.
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