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Multi echo PRESTO

机译:多回声SOON

摘要

A magnetic resonance imaging system (78) includes a magnetic resonance imaging device (80), one or more processors (104), and a display (106). The magnetic resonance imaging device (80) includes a magnet (82), gradient coils (88), and one or more radio frequency coils (92). The magnet (82) generates a Bo field. The gradient coils (88) apply gradient fields to the Bo field. The one or more radio frequency coils (92) generate a radio frequency pulse to excite magnetic resonance and measure generated gradient echoes. The one or more processors (104) are configured to activate (116) the one or more radio frequency coils (92) to generate a series of radio frequency pulses spaced by repetition times and to induce magnetic resonance. The one or more processors (104) are configured to control (118) the gradient coils to apply after each RF pulse readout gradient field pulses which refocus the resonance into a plurality of gradient echoes, shift and refocus gradient field pulses which shift and refocus at least one of the echoes to a subsequent repetition time, and receive and demodulate the gradient echoes to form k-space data lines. The one or more processors are configured to reconstruct (124) one or more images from the measured one or more gradient echoes. A display (106) displays the one or more reconstructed images.
机译:磁共振成像系统(78)包括磁共振成像设备(80),一个或多个处理器(104)和显示器(106)。磁共振成像设备(80)包括磁体(82),梯度线圈(88)和一个或多个射频线圈(92)。磁体(82)产生Bo场。梯度线圈(88)将梯度场施加到Bo场。一个或多个射频线圈(92)产生射频脉冲以激发磁共振并测量所产生的梯度回波。一个或多个处理器(104)被配置为激活(116)一个或多个射频线圈(92)以产生由重复时间间隔开的一系列射频脉冲并引起磁共振。一个或多个处理器(104)被配置为控制(118)梯度线圈,以在每个RF脉冲读出之后将共振重新聚焦成多个梯度回波的梯度场脉冲施加,梯度场脉冲在其处移位和重新聚焦。回声中的至少一个到随后的重复时间,并接收和解调梯度回声以形成k空间数据线。一个或多个处理器被配置为从所测量的一个或多个梯度回波重建(124)一个或多个图像。显示器(106)显示一个或多个重构图像。

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