公开(公告)号：US5436600A

公开(公告)日：1995-07-25

申请号：US283050

申请日：1994-07-29

申请人： John Van Heteren ,  Mitsuaki Arakawa ,  Lawrence E. Crooks ,  John C. Hoenninger, III ,  Thomas McDermott ,  Keiji Furui

发明人： John Van Heteren ,  Mitsuaki Arakawa ,  Lawrence E. Crooks ,  John C. Hoenninger, III ,  Thomas McDermott ,  Keiji Furui

IPC分类号： G01R33/36 ,  G01R33/48 ,  H03B21/02 ,  H03B28/00 ,  G01R33/24 ,  H03C1/52 ,  H03C1/60

CPC分类号： H03B21/02 ,  G01R33/3607 ,  G01R33/446 ,  H03B28/00

摘要： A local frequency generator employing a single crystal oscillator, latches and direct digital synthesizer circuits digitally produces all signals needed in the transmitter channel of a MRI system to generate MRI transmitter RF pulses. The local frequency generator is operable in both the single side band and double side band modes and has the capability of switching between the modes. The generator is constructed with a phase resetting capability for providing the plural output frequencies needed for making plural MRI slices.

摘要翻译： 使用单晶振荡器的本地频率发生器，锁存器和直接数字合成器电路数字地产生MRI系统的发射器通道中所需的所有信号，以产生MRI发射器RF脉冲。 本地频率发生器可以在单边带和双边带模式下工作，并具有在各种模式之间切换的能力。 该发生器具有相位复位功能，用于提供制作多个MRI切片所需的多个输出频率。

公开(公告)号：US20130317343A1

公开(公告)日：2013-11-28

申请号：US13523257

申请日：2012-06-14

申请人： Gordon Klimenko ,  Meir Dahan ,  Brendan Guyot ,  Labros Petropoulos ,  John Saunders ,  John Van Heteren ,  Jeff Winter ,  Hongxiang Yi

发明人： Gordon Klimenko ,  Meir Dahan ,  Brendan Guyot ,  Victoria Hornblower ,  Labros Petropoulos ,  John Saunders ,  John Van Heteren ,  Jeff Winter ,  Hongxiang Yi

IPC分类号： A61B5/00 ,  A61N5/10 ,  A61B5/055

CPC分类号： A61B5/0046 ,  A61B5/055 ,  A61B5/0555 ,  A61B5/4836 ,  A61N5/1001 ,  A61N5/1039 ,  A61N5/1077 ,  A61N2005/1055 ,  A61N2005/1063 ,  A61N2005/1094 ,  G01R33/4808

摘要： Apparatus for radiation therapy combines a patient table, an MRI and a radiation treatment apparatus mounted in a common treatment room with the MR magnet movable from a position outside a radiation shielded door to an imaging position. An RF-shielded door is movable between a position, separating part of the treatment apparatus from the magnet and an open position allowing access of the patient to the treatment apparatus. In one configuration there is a row of treatment rooms and the magnet is mounted to move along a passageway outside the row of radiation shielded doors of the rooms.

摘要翻译： 用于放射治疗的装置将安装在公共治疗室中的患者台，MRI和放射治疗装置与可从辐射屏蔽门外部的位置移动到成像位置的MR磁体组合。 射频屏蔽门可在处理装置的一部分与磁体分离的位置和允许患者进入治疗装置的打开位置之间移动。 在一个配置中，存在一排治疗室，并且磁体安装成沿着房间的辐射屏蔽门外的通道移动。

公开(公告)号：US5461314A

公开(公告)日：1995-10-24

申请号：US139177

申请日：1993-10-21

申请人： Mitsuaki Arakawa ,  Hsu Chang ,  John Van Heteren

发明人： Mitsuaki Arakawa ,  Hsu Chang ,  John Van Heteren

IPC分类号： A61B5/055 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/58 ,  G01V3/00

CPC分类号： G01R33/3628 ,  G01R33/3415 ,  G01R33/3642 ,  G01R33/3678 ,  G01R33/583

摘要： A front end unit (32) for a magnetic resonance imaging (MRI) system (20) comprises a plurality of coil attachment ports (46) to which an RF signal or tuning signal is selectively routed thereby permitting, during operation, coils (22) to remain attached to each of the plurality of ports. A signal routing controller (28, 30) selects to which of the ports the RF signal or tuning signal is to be routed. The RF front end Knit (32) is also known as the relay switchboard assembly or RSB. Each port of the RF front end is attached to a different RF coil or RF coil combination. Tuning and imaging operations can be conducted for a plurality of coils in succession, without coils having to be detached from the RF front end. The signal routing controller selectively applies the RF signal (from an RF unit) or the tuning signal (from a tuning controller) to the selected coil through a signal path unique to the selected coil. Coils not selected to be operative can be detuned.

摘要翻译： 用于磁共振成像（MRI）系统（20）的前端单元（32）包括多个线圈附接端口（46），RF信号或调谐信号被选择性地布线到所述多个线圈附接端口，从而在操作期间允许线圈（22） 以保持附接到多个端口中的每一个。 信号路由选择控制器（28,30）选择RF信号或调谐信号要路由的哪个端口。 RF前端针织（32）也称为中继配电板组件或RSB。 RF前端的每个端口连接到不同的RF线圈或RF线圈组合。 可以连续地对多个线圈进行调谐和成像操作，而不必将线圈从RF前端分离。 信号路由控制器通过所选线圈唯一的信号路径选择性地将RF信号（来自RF单元）或调谐信号（来自调谐控制器）施加到所选择的线圈。 不选择操作的线圈可能失谐。

公开(公告)号：US09138145B2

公开(公告)日：2015-09-22

申请号：US13523257

申请日：2012-06-14

申请人： Gordon Klimenko ,  Meir Dahan ,  Brendan Guyot ,  Labros Petropoulos ,  John Saunders ,  John Van Heteren ,  Jeff Winter ,  Hongxiang Yi

发明人： Gordon Klimenko ,  Meir Dahan ,  Brendan Guyot ,  Victoria Hornblower ,  Labros Petropoulos ,  John Saunders ,  John Van Heteren ,  Jeff Winter ,  Hongxiang Yi

IPC分类号： A61B5/05 ,  A61B5/00 ,  A61B5/055 ,  G01R33/48 ,  A61N5/10

CPC分类号： A61B5/0046 ,  A61B5/055 ,  A61B5/0555 ,  A61B5/4836 ,  A61N5/1001 ,  A61N5/1039 ,  A61N5/1077 ,  A61N2005/1055 ,  A61N2005/1063 ,  A61N2005/1094 ,  G01R33/4808

摘要： Apparatus for radiation therapy combines a patient table, an MRI and a radiation treatment apparatus mounted in a common treatment room with the MR magnet movable from a position outside a radiation shielded door to an imaging position. An RF-shielded door is movable between a position, separating part of the treatment apparatus from the magnet and an open position allowing access of the patient to the treatment apparatus. In one configuration there is a row of treatment rooms and the magnet is mounted to move along a passageway outside the row of radiation shielded doors of the rooms.

摘要翻译： 用于放射治疗的装置将安装在公共治疗室中的患者台，MRI和放射治疗装置与可从辐射屏蔽门外部的位置移动到成像位置的MR磁体组合。 射频屏蔽门可在处理装置的一部分与磁体分离的位置和允许患者进入治疗装置的打开位置之间移动。 在一个配置中，存在一排治疗室，并且磁体安装成沿着房间的辐射屏蔽门外的通道移动。

公开(公告)号：US20060111796A1

公开(公告)日：2006-05-25

申请号：US11287748

申请日：2005-11-28

申请人： John Van Heteren

发明人： John Van Heteren

IPC分类号： G05B11/01

CPC分类号： G01D4/004 ,  G06Q50/06 ,  Y02B90/242 ,  Y02B90/246 ,  Y04S20/322 ,  Y04S20/42

摘要： Methods and apparatus, including computer program products, implementing and using techniques for intelligent two-way telemetry. A telemetry system in accordance with the invention includes one or more telemetry units that can receive and send data The system further includes one or more controllers that includes intelligence for processing data from the one or more telemetry units and for autonomously communicating with the one or more telemetry units. The controllers are separately located from a data processing center of the telemetry system such that the controllers alleviate data congestion going to and coming from the data processing center.

摘要翻译： 方法和设备，包括计算机程序产品，实现和使用智能双向遥测技术。 根据本发明的遥测系统包括可以接收和发送数据的一个或多个遥测单元。系统还包括一个或多个控制器，其包括用于处理来自一个或多个遥测单元的数据的智能，并且用于与一个或多个 遥测单位。 控制器分别位于遥测系统的数据处理中心，使得控制器缓解来自数据处理中心的数据拥塞。

公开(公告)号：US5565779A

公开(公告)日：1996-10-15

申请号：US476586

申请日：1995-06-07

申请人： Mitsuaki Arakawa ,  Hsu Chang ,  John Van Heteren

发明人： Mitsuaki Arakawa ,  Hsu Chang ,  John Van Heteren

IPC分类号： A61B5/055 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/58 ,  G01V3/00

CPC分类号： G01R33/3628 ,  G01R33/3415 ,  G01R33/3642 ,  G01R33/3678 ,  G01R33/583

摘要： A front end unit (32) for a magnetic resonance imaging (MRI) system (20) comprises a plurality of coil attachment ports (46) to which an RF signal or tuning signal is selectively routed thereby permitting, during operation, coils (22) to remain attached to each of the plurality of ports. A signal routing controller (28, 30) selects to which of the ports the RF signal or tuning signal is to be routed. The RF front end unit (32) is also known as the relay switch board assembly or RSB. Each port of the RF front end is attached to a different RF coil or RF coil combination. Tuning and imaging operations can be conducted for a plurality of coils in succession, without coils having to be detached from the RF front end. The signal routing controller selectively applies the RF signal (from an RF unit) or the tuning signal (from a tuning controller) to the selected coil through a signal path unique to the selected coil. Coils not selected to be operative can be detuned.

摘要翻译： 用于磁共振成像（MRI）系统（20）的前端单元（32）包括多个线圈附接端口（46），RF信号或调谐信号被选择性地布线到所述多个线圈附接端口，从而在操作期间允许线圈（22） 以保持附接到多个端口中的每一个。 信号路由选择控制器（28,30）选择RF信号或调谐信号要路由的哪个端口。 RF前端单元（32）也称为继电器开关板组件或RSB。 RF前端的每个端口连接到不同的RF线圈或RF线圈组合。 可以连续地对多个线圈进行调谐和成像操作，而不必将线圈从RF前端分离。 信号路由控制器通过所选线圈唯一的信号路径选择性地将RF信号（来自RF单元）或调谐信号（来自调谐控制器）施加到所选择的线圈。 不选择操作的线圈可能失谐。

公开(公告)号：US5483158A

公开(公告)日：1996-01-09

申请号：US139178

申请日：1993-10-21

申请人： John van Heteren ,  Mitsuaki Arakawa

发明人： John van Heteren ,  Mitsuaki Arakawa

IPC分类号： A61B5/055 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/58 ,  G01R33/28

CPC分类号： G01R33/3628 ,  G01R33/3415 ,  G01R33/583

摘要： An RF front end unit (32) for a magnetic resonance imaging (MRI) system (20) has transmit and receive channels to which a plurality of coils (22) can remain attached during operation (including RF coils having differing types of matching circuits), and facilitates switching between a plurality of attached coils. Methods and apparatus are additionally provided for selectively tuning differing RF coils, including both high power coils (22B, 22C) and varactor-tuned coils (22D). The tuning of a high power coil involves using a remote impedance match tuning network (RTU) (26) for a coarse tuning operation and, if necessary, a fine tuning operation. In performing the coarse tuning operation separately for In-Phase ("I") and Quadrature ("Q") channels, a tuning controller (60) determines the effective load impedance of each of the RF coil channels by quadrature demodulation of their reflected signals. The tuning controller (60) then evaluates a computerized model of the impedance match tuning network in order to determine and set coarse values for the adjustable impedances of the RTU. In tuning varactor coils, the tuning controller chooses a starting point for the varactor coil tune and then executes a two-dimensional bisection search operation to locate a candidate for the tuned point. The bisection search is followed by a starburst operation for examining the magnitude of reflected signals at points in a starburst or asterisk pattern about the candidate point.

摘要翻译： 用于磁共振成像（MRI）系统（20）的RF前端单元（32）具有在操作期间多个线圈（22）可以保持附接的发射和接收通道（包括具有不同类型的匹配电路的RF线圈） 并且便于在多个附接线圈之间切换。 还提供了用于选择性地调谐包括高功率线圈（22B，22C）和变容二极管调谐线圈（22D）的不同RF线圈的方法和装置。 大功率线圈的调谐涉及使用远程阻抗匹配调谐网络（RTU）（26）进行粗调操作，如果需要，可进行微调操作。 在对同相（“I”）和正交（“Q”）通道分别执行粗调操作时，调谐控制器（60）通过它们的反射信号的正交解调来确定每个RF线圈通道的有效负载阻抗 。 调谐控制器（60）然后评估阻抗匹配调谐网络的计算机化模型，以便确定并设置RTU的可调节阻抗的粗略值。 在调谐变容二极管线圈时，调谐控制器选择变容二极管线圈调谐的起始点，然后执行二维平分搜索操作以定位调谐点的候选。 平分搜索之后是星爆操作，用于检查关于候选点的星爆或星号图案中的点处的反射信号的大小。