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    • 4. 发明申请
    • MAGNETIC RESONANCE DEVICE AND METHOD
    • 磁共振装置及方法
    • US20090237079A1
    • 2009-09-24
    • US11721173
    • 2005-12-14
    • Marinus Johannes Adrianus Maria Van HelvoortJohannes Petrus GroenRobert Paul KleihorstCornelis Leonardus Gerardus Ham
    • Marinus Johannes Adrianus Maria Van HelvoortJohannes Petrus GroenRobert Paul KleihorstCornelis Leonardus Gerardus Ham
    • G01R33/46G01R33/36
    • G01R33/3692G01R33/3415G01R33/3621
    • The invention relates to a device (1) for magnetic resonance imaging of a body (7), comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone, a plurality of wireless receiving units (10a, 10b) placed in or near the examination zone, and sampling means (21a, 21b) operating at a variable sampling frequency for sampling the received MR signals and for converting them into digital signal samples. In order to provide an MR device (1), which is arranged to inductively energize the wireless receiving units (10a, 10b) without interference with the nuclear spin system of the examined object (7) and which does not necessarily require bulky energy storage means for the operation of the wireless receiving units (10a, 10b), the invention proposes to make provision for energizing means (17) generating an RF energizing field within the examination zone for inductively supplying electric power to the wireless receiving units (10a, 10b), wherein the frequency of the RF energizing field is an integer multiple of the sampling frequency.
    • 本发明涉及一种用于身体(7)的磁共振成像的装置(1),包括用于在检查区内产生静止且基本均匀的主磁场的主磁体(2),多个无线接收单元 10a,10b),以及以可变采样频率工作的采样装置(21a,21b),用于对接收的MR信号进行采样并将其转换成数字信号采样。 为了提供一种MR装置(1),其被布置成在不干扰检查对象(7)的核自旋系统的情况下感应地激励无线接收单元(10a,10b),并且不一定需要庞大的能量存储装置 为了无线接收单元(10a,10b)的操作,本发明提出为激励装置(17)提供在该检查区域内产生用于向无线接收单元(10a,10b)供电的电力的RF激励场, ,其中所述RF激励场的频率是所述采样频率的整数倍。
    • 7. 发明申请
    • Mri System Comprising a Scan Room Inferface for A/D-Conversion of Mr Signals Between a Receiver Coil Unit and a Remote Signal Processing Unit
    • 包含扫描室的Mri系统接收器线圈单元和远程信号处理单元之间的信号的A / D转换的表面
    • US20080191695A1
    • 2008-08-14
    • US11909164
    • 2006-03-20
    • Marinus Johannes Adrianus Maria Van HelvoortMarc Paul SaesJohan Samuel Van Den BrinkRobert Paul KleihorstPaulus Cornelius Hendrikus Adrianus Haans
    • Marinus Johannes Adrianus Maria Van HelvoortMarc Paul SaesJohan Samuel Van Den BrinkRobert Paul KleihorstPaulus Cornelius Hendrikus Adrianus Haans
    • G01R33/36
    • G01R33/3621G01R33/3415G01R33/3692
    • The present invention relates to a magnetic resonance imaging system, to a magnetic resonance imaging method for operating a magnetic resonance imaging system and to a computer program for operating a magnetic resonance imaging system. In order to considerably reduce the number of cabling in a magnetic resonance imaging system a magnetic resonance imaging system (1) is suggested, the system comprising: an examination zone (5) arranged to receive a body for examination; magnetic field generating means (9, 10, 24) for generating a magnetic field in the examination zone (5); a receiving unit (14) located in the examination zone (5) or in the vicinity of the examination zone (5); an interface unit (17) located in the examination zone (5) or in the vicinity of the examination zone (5), and arranged separately from the receiving unit (14); and a signal processing unit (21) disposed at a location (2) remote from the receiving unit (14) and the interface unit (17); wherein the receiving unit (14) comprising a receiver (15) adapted to receive a spin resonance signal generated in the examination zone (5), and a transmitter (16) adapted to transmit the spin resonance signal to the interface unit (17); and wherein the interface unit (17) comprises a receiver (20) for receiving the spin resonance signals, an analog to digital converter (19) adapted to generate a digital signal in response to the received spin resonance signal, and a transmitter (20) for transmitting the digitized signal to the signal processing unit (21).
    • 磁共振成像系统技术领域本发明涉及一种用于操作磁共振成像系统的磁共振成像方法和用于操作磁共振成像系统的计算机程序的磁共振成像系统。 为了大大减少磁共振成像系统中的电缆数量,建议使用磁共振成像系统(1),该系统包括:检查区域(5),布置成接收检查体; 用于在检查区(5)中产生磁场的磁场产生装置(9,10,24); 位于检查区(5)或检查区(5)附近的接收单元(14); 位于所述检查区域(5)中或所述检查区域(5)附近的接口单元(17),并且与所述接收单元(14)分开布置; 以及设置在远离所述接收单元(14)和所述接口单元(17)的位置(2)处的信号处理单元(21)。 其中所述接收单元(14)包括适于接收在所述检查区(5)中产生的自旋共振信号的接收器(15)和适于将所述自旋共振信号传输到所述接口单元(17)的发射器(16)。 并且其中所述接口单元(17)包括用于接收所述自旋谐振信号的接收器(20),适于响应于所接收的自旋谐振信号产生数字信号的模数转换器(19),以及发射器(20) 用于将数字化信号发送到信号处理单元(21)。
    • 8. 发明授权
    • MRI system comprising a scan room interface for A/D-conversion of MR signals between a receiver coil unit and a remote signal processing unit
    • MRI系统包括用于在接收器线圈单元和远程信号处理单元之间进行MR信号的A / D转换的扫描室接口
    • US07746072B2
    • 2010-06-29
    • US11909164
    • 2006-03-20
    • Marinus Johannes Adrianus Maria Van HelvoortMarc Paul SaesJohan Samuel Van Den BrinkRobert Paul KleihorstPaulus Cornelius Hendrikus Adrianus Haans
    • Marinus Johannes Adrianus Maria Van HelvoortMarc Paul SaesJohan Samuel Van Den BrinkRobert Paul KleihorstPaulus Cornelius Hendrikus Adrianus Haans
    • G01V3/00
    • G01R33/3621G01R33/3415G01R33/3692
    • The present invention relates to a magnetic resonance imaging system, to a magnetic resonance imaging method for operating a magnetic resonance imaging system and to a computer program for operating a magnetic resonance imaging system. In order to considerably reduce the number of cabling in a magnetic resonance imaging system a magnetic resonance imaging system (1) is suggested, the system comprising: an examination zone (5) arranged to receive a body for examination; magnetic field generating means (9, 10, 24) for generating a magnetic field in the examination zone (5); a receiving unit (14) located in the examination zone (5) or in the vicinity of the examination zone (5); an interface unit (17) located in the examination zone (5) or in the vicinity of the examination zone (5), and arranged separately from the receiving unit (14); and a signal processing unit (21) disposed at a location (2) remote from the receiving unit (14) and the interface unit (17); wherein the receiving unit (14) comprising a receiver (15) adapted to receive a spin resonance signal generated in the examination zone (5), and a transmitter (16) adapted to transmit the spin resonance signal to the interface unit (17); and wherein the interface unit (17) comprises a receiver (20) for receiving the spin resonance signals, an analog to digital converter (19) adapted to generate a digital signal in response to the received spin resonance signal, and a transmitter (20) for transmitting the digitized signal to the signal processing unit (21).
    • 磁共振成像系统技术领域本发明涉及一种用于操作磁共振成像系统的磁共振成像方法和用于操作磁共振成像系统的计算机程序的磁共振成像系统。 为了大大减少磁共振成像系统中的电缆数量,建议使用磁共振成像系统(1),该系统包括:检查区域(5),布置成接收检查体; 用于在检查区(5)中产生磁场的磁场产生装置(9,10,24); 位于检查区(5)或检查区(5)附近的接收单元(14); 位于所述检查区域(5)中或所述检查区域(5)附近的接口单元(17),并且与所述接收单元(14)分开布置; 以及设置在远离所述接收单元(14)和所述接口单元(17)的位置(2)处的信号处理单元(21)。 其中所述接收单元(14)包括适于接收在所述检查区(5)中产生的自旋共振信号的接收器(15)和适于将所述自旋共振信号传输到所述接口单元(17)的发射器(16)。 并且其中所述接口单元(17)包括用于接收所述自旋谐振信号的接收器(20),适于响应于所接收的自旋谐振信号产生数字信号的模数转换器(19),以及发射器(20) 用于将数字化信号发送到信号处理单元(21)。
    • 9. 发明授权
    • System of electric coils for transmitting and receiving radio-frequency magnetic fields in a magnetic-resonance imaging apparatus, and magnetic-resonance imaging apparatus provided with such a system of electric coils
    • 用于在磁共振成像装置中发射和接收射频磁场的电线圈系统和具有这种电线圈系统的磁共振成像装置
    • US07602188B2
    • 2009-10-13
    • US11572714
    • 2005-07-12
    • Cecilia PossanziniMarinus Johannes Adrianus Maria Van HelvoortJan Bertus Marten WarntjesRobert Paul Kleihorst
    • Cecilia PossanziniMarinus Johannes Adrianus Maria Van HelvoortJan Bertus Marten WarntjesRobert Paul Kleihorst
    • G01V3/00
    • G01R33/341
    • The invention relates to a magnetic-resonance imaging (MRI) apparatus comprising an electrical coil system (17) for transmitting and receiving a radio-frequency (RF) magnetic field from an examination volume (3) of the MRI apparatus. The electrical coil system (17) comprises at least one surface coil (35) which extends substantially in a plane. The surface coil is used for transmitting and/or receiving a RF magnetic field which is oriented substantially perpendicularly to the plane of the surface coil (35). The surface coil (35) has a main coil axis (37). When the MRI apparatus is in use, the main coil axis (37) extends substantially parallel to a main magnetic field in the examination volume (3) of the MRI apparatus. On both sides of the main coil axis (37), the surface coil (35) comprises an electrically conducting element (39) which extends substantially parallel to the main coil axis (37). To provide a surface coil (35) which transmits more homogeneous RF magnetic fields and/or has a more homogeneous sensitivity for received RF magnetic fields than known surface coils, at least one of the electrically conducting elements (39) of the surface coil (35) comprises at least two electric conductors (41). With respect to their distance to the main coil axis (37), these electric conductors (41) are positioned at a relatively short distance from each other. In the plane of the surface coil (35), the electric conductors (41)extend substantially parallel to the main coil axis (37) of the surface coil (35).
    • 本发明涉及一种磁共振成像(MRI)装置,其包括用于从MRI装置的检查体积(3)发射和接收射频(RF)磁场的电线圈系统(17)。 电线圈系统(17)包括基本上在平面中延伸的至少一个表面线圈(35)。 表面线圈用于传输和/或接收基本上垂直于表面线圈(35)的平面定向的RF磁场。 表面线圈(35)具有主线圈轴(37)。 当使用MRI装置时,主线圈轴线(37)基本上平行于MRI装置的检查体积(3)中的主磁场延伸。 在主线圈轴线(37)的两侧,表面线圈(35)包括基本上平行于主线圈轴线(37)延伸的导电元件(39)。 为了提供表面线圈(35),所述表面线圈(35)传递更均匀的RF磁场和/或对已接收的RF磁场具有比已知表面线圈更均匀的灵敏度,表面线圈(35)的至少一个导电元件(39) )包括至少两个电导体(41)。 对于它们到主线圈轴线(37)的距离,这些电导体(41)位于彼此相对短的距离处。 在表面线圈(35)的平面中,电导体(41)基本上平行于表面线圈(35)的主线圈轴线(37)延伸。
    • 10. 发明授权
    • Reduction of peak electrical power consumption in magnetic resonance imaging systems
    • 降低磁共振成像系统中的峰值功耗
    • US09594132B2
    • 2017-03-14
    • US14006127
    • 2012-03-23
    • Marinus Johannes Adrianus Maria Van Helvoort
    • Marinus Johannes Adrianus Maria Van Helvoort
    • G01V3/00G01R33/34G01R33/385
    • G01R33/34023G01R33/3856
    • A magnetic resonance imaging system (402, 500) includes magnetic field gradient coils (516), a gradient coil power supply (320, 424, 518), a processor (540), and a chiller (308, 526) for providing the coolant to the gradient coils. The magnetic resonance imaging system further includes a memory (546) for storing machine executable instructions (580, 582, 584, 586, 588, 590, 592). The instructions cause the processor to receive (100, 200) a pulse sequence (550), to generate (102, 202) the chiller control signals using the pulse sequence and a chiller thermal model (582) of the gradient coils and the coolant reservoir, and to send (104, 206) the chiller control signals to the chiller. The chiller control signals cause the chiller to halt chilling at least a portion of the time when the gradient coil power supply supplies current to the magnetic field gradient coils.
    • 磁共振成像系统(402,500)包括磁场梯度线圈(516),梯度线圈电源(320,424,518),处理器(540)和用于提供冷却剂的冷却器(308,526) 到梯度线圈。 磁共振成像系统还包括用于存储机器可执行指令(580,582,584,586,58,590,592)的存储器(546)。 指令使得处理器接收(100,200)脉冲序列(550),以使用脉冲序列和梯度线圈的冷却器热模型(582)和冷却剂储存器(582)产生(102,202)冷却器控制信号 ,并将冷却器控制信号(104,206)发送到冷却器。 当梯度线圈电源向磁场梯度线圈提供电流时,冷却器控制信号使冷却器停止至少一部分时间的冷却。