公开(公告)号：EP0616229A1

公开(公告)日：1994-09-21

申请号：EP94300923.3

申请日：1994-02-08

申请人： PICKER INTERNATIONAL, INC.

发明人： Zou, Xuemin ,  Patrick, John L. ,  McNally, James M.

IPC分类号： G01R33/36 ,  G01R33/54

CPC分类号： G01R33/385 ,  G01R33/3415 ,  G01R33/422 ,  G01R33/54

摘要： Superconducting magnets (10) of a magnetic resonance imager create static magnetic fields through an examination region (12). Gradient magnetic field coils (30) under control of a gradient magnetic field control (42) generate gradient magnetic fields across the examination region (12), as a whole. A plurality of surface coils (36, 38) receive radio frequency signals from each of two distinct subregions within the examination region (12). The two receiver coils are connected with separate receivers (60₁, 60₂) which demodulate the received magnetic resonance signals. The magnetic resonance signals are reconstructed (76) into an imager representation (80, 82) of the first and second subregions. In the embodiment of Figures 1 and 2, a radio frequency transmitter (40) and a whole body coil (32) generate and manipulate the magnetic resonance signals within the first and second subregions. In other embodiments, a plurality of transmitters (40₁, 40₂...) convey RF signals to the surface coils such that the surface coils operate in both a transmit and receive mode. Regardless whether a single transmitter or a series of transmitters is utilized, a sequence control (44) controls the transmitter(s) and the gradient control (42) to conduct conventional magnetic resonance imaging sequences in coordination in both subregions.

摘要翻译： 磁共振成像器的超导磁体（10）通过检查区域（12）产生静态磁场。 在梯度磁场控制（42）的控制下的梯度磁场线圈（30）整体上跨越检查区域（12）产生梯度磁场。 多个表面线圈（36,38）从检查区域（12）内的两个不同子区域中的每一个接收射频信号。 两个接收器线圈与解调所接收的磁共振信号的单独的接收器（601,602）连接。 磁共振信号被重构（76）成为第一和第二子区域的成像器表示（80,82）。 在图1和2的实施例中，射频发射器（40）和全身线圈（32）产生并操纵第一和第二子区域内的磁共振信号。 在其他实施例中，多个发射器（401,402 ...）将RF信号传送到表面线圈，使得表面线圈在发射和接收模式中都工作。 不管使用单个发射机还是一系列发射机，序列控制（44）控制发射机和梯度控制（42）以在两个子区域协调地进行常规磁共振成像序列。