公开(公告)号：US07852085B2

公开(公告)日：2010-12-14

申请号：US12350284

申请日：2009-01-08

申请人： Jian Min Wang ,  Bi Da Zhang ,  Yao Xing ,  Zeng He He

发明人： Jian Min Wang ,  Bi Da Zhang ,  Yao Xing ,  Zeng He He

IPC分类号： G01V3/00

CPC分类号： G01R33/3415 ,  G01R33/3657 ,  G01R33/5659

摘要： A receiving device for an MRI (magnetic resonance imaging) system has multiple receiving coils. In the same imaging acceleration direction, a junction region is formed between adjacent receiving coils. An additional receiving coil is arranged on the junction region. The additional receiving coil covers at least partially a line of strong phase variation in sensitivity at the boundary of said junction region. This receiving device alleviates the problem of poor sensitivity to MRI signals in the junction region in the imaging acceleration direction, so as to improve the imaging quality in the junction region, and thus improving the overall imaging quality.

摘要翻译： 用于MRI（磁共振成像）系统的接收装置具有多个接收线圈。 在相同的成像加速方向上，在相邻的接收线圈之间形成接合区域。 在接合区域上设置一个附加的接收线圈。 附加接收线圈至少部分地覆盖在所述接合区域的边界处的灵敏度的强相位变化的线。 该接收装置缓解了在成像加速方向上的结区域对MRI信号的灵敏度差的问题，以提高接合区域的成像质量，从而提高整体成像质量。

公开(公告)号：US20090186586A1

公开(公告)日：2009-07-23

申请号：US12354320

申请日：2009-01-15

申请人： Jian Min Wang ,  Wei Dong Wang ,  Yao Xing

发明人： Jian Min Wang ,  Wei Dong Wang ,  Yao Xing

IPC分类号： H04B17/00

CPC分类号： H04B1/18

摘要： A transmission circuit for radio frequency signals has a power mixer and includes a radio frequency input port, a first radio frequency output port, a second radio frequency output port, and a dummy load port. The transmission circuit also has a first switch unit and a second switch unit. The first switch unit is connected to the first radio frequency output port and outputs the radio frequency signals which are emitted from the first radio frequency output port or reflects the radio frequency signals which are emitted from the first radio frequency output port back to the first radio frequency output port. The second switch unit is connected to the second radio frequency output port and outputs the radio frequency signals which are emitted from the second radio frequency output port, or reflects the radio frequency signals which are emitted from the second radio frequency output port back to the second radio frequency output port. The radio frequency signals reflected to the radio frequency input port by the first switch unit and the radio frequency signals reflected to said radio frequency input port by the second switch unit cancel each other. The transmission circuit has reduced complexity and cost.

摘要翻译： 用于射频信号的发送电路具有功率混频器，包括射频输入端口，第一射频输出端口，第二射频输出端口和虚拟负载端口。 传输电路还具有第一开关单元和第二开关单元。 第一开关单元连接到第一射频输出端口，并输出从第一射频输出端口发射的射频信号或将从第一射频输出端口发射的射频信号反射回第一无线电 频率输出端口。 第二开关单元连接到第二射频输出端口，并输出从第二射频输出端口发射的射频信号，或将从第二射频输出端口发射的射频信号反射回第二射频信号 射频输出端口。 由第一开关单元反射到射频输入端口的射频信号和由第二开关单元反射到所述射频输入端口的射频信号彼此抵消。 传输电路具有降低的复杂性和成本。

公开(公告)号：US20090174498A1

公开(公告)日：2009-07-09

申请号：US12347348

申请日：2008-12-31

申请人： Yao Xing ,  Yang Wang ,  Yan Hong Chen ,  Hua Bin Zhu ,  Jian Min Wang

发明人： Yao Xing ,  Yang Wang ,  Yan Hong Chen ,  Hua Bin Zhu ,  Jian Min Wang

IPC分类号： H01P1/10

CPC分类号： G01R33/3664 ,  G01R33/3415

摘要： A radio frequency (RF) switch device has at least two RF switch units, each RF switch unit having an output terminal and at least two input terminals. The RF switch units select one channel of RF signals from several channels of the RF signals that are supplied as inputs to their input terminals for emission as an output from their output terminals. A magnetic resonance imaging system and an RF signal transmission method employ such an RF switch device. The use of such an RF switch device reduces the number of channels of the RF signals that need to be further transmitted, which in turn reduces the number of the corresponding long RF cable channels and the number of channels of the subsequent devices, thereby preventing waste and reducing the cost of the system. Moreover, if the subsequent devices include a receiver coil channel selector, then the complexity of the receiver coil channel selector will also be reduced as the number of RF signal channels is decreased.

摘要翻译： 射频（RF）开关装置具有至少两个RF开关单元，每个RF开关单元具有输出端和至少两个输入端。 RF开关单元从RF信号的多个通道中选择一个通道的RF信号，该信号作为输入端被提供给输入端，用于从其输出端输出。 磁共振成像系统和RF信号传输方法采用这种RF开关装置。 使用这种RF开关装置减少需要进一步传输的RF信号的信道数量，这反过来减少对应的长RF电缆信道的数量和后续设备的信道数量，从而防止浪费 并降低系统的成本。 此外，如果随后的设备包括接收器线圈通道选择器，则随着RF信号通道的数量减少，接收器线圈通道选择器的复杂度也将减小。