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公开(公告)号：US06377045B1
公开(公告)日：2002-04-23
申请号：US09572994
申请日：2000-05-17
申请人： Johan Samuel Van Den Brink , Rudolf Mathias Johannes Nicolaas Lamerichs , Paulus Johannes Maria Folkers , Arianne Margarethe Corinne Van Muiswinkel , Klaas Paul Pruessmann , Markus Weiger , Ulrike Dydak
发明人： Johan Samuel Van Den Brink , Rudolf Mathias Johannes Nicolaas Lamerichs , Paulus Johannes Maria Folkers , Arianne Margarethe Corinne Van Muiswinkel , Klaas Paul Pruessmann , Markus Weiger , Ulrike Dydak
IPC分类号： G01V300
CPC分类号： G01R33/4822 , G01R33/485 , G01R33/5611
摘要： A spectroscopic magnetic resonance imaging method involves sub-sampling in the k space. For example, the SENSE technique is applied in spectroscopic MR imaging. Such sub-sampling is also applied in three-dimensional MR imaging.
摘要翻译： 光谱磁共振成像方法涉及在k空间中的二次采样。 例如，SENSE技术应用于光谱MR成像。 这种次采样也应用于三维MR成像。
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公开(公告)号：US09547060B2
公开(公告)日：2017-01-17
申请号：US14002549
申请日：2012-02-28
IPC分类号： G01R33/56 , G01R33/54 , G01R33/36 , G01R33/561 , G01R33/565 , G01R33/32 , G01R33/34
CPC分类号： G01R33/54 , G01R33/32 , G01R33/34076 , G01R33/3614 , G01R33/5605 , G01R33/5612 , G01R33/5659
摘要： The invention relates to a method of MR imaging of at least a portion of a body (110) of a patient placed in an examination volume of a MR device, the method comprising the steps of:—subjecting the portion of the body (110) to an imaging sequence comprising at least one RF pulse, the RF pulse being transmitted toward the portion of the body (110) via a RF coil arrangement (109) to which RF signals are supplied by two or more RF power amplifiers the RF power amplifiers being activated alternately during the imaging sequence in a time-multiplexed fashion, wherein the imaging sequence requires a RF duty cycle and/or a RF pulse duration exceeding the specification of at least one of the RF power amplifiers;—acquiring MR signals from the portion of the body (110); and—reconstructing a MR image from the acquired MR signals. Moreover, the invention relates to a method of MR spectroscopy involving the alternating use of RF power amplifiers in a time-multiplexed fashion.
摘要翻译： 本发明涉及放置在MR装置的检查体积中的患者的身体（110）的至少一部分的MR成像方法，该方法包括以下步骤： - 将身体部分（110） 涉及包括至少一个RF脉冲的成像序列，所述RF脉冲经由RF线圈装置（109）朝向身体（110）的部分传输，RF信号由两个或更多个RF功率放大器提供给RF功率放大器 在成像序列期间以时间复用的方式交替激活，其中所述成像序列需要超过RF功率放大器中的至少一个的规定的RF占空比和/或RF脉冲持续时间; - 从所述部分获取MR信号 的身体（110）; 并从所获取的MR信号重构MR图像。 此外，本发明涉及涉及以时分复用方式交替使用RF功率放大器的MR光谱的方法。
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公开(公告)号：US08705824B2
公开(公告)日：2014-04-22
申请号：US13320551
申请日：2010-06-03
IPC分类号： G06K9/00
CPC分类号： G06F19/321 , G06F19/00
摘要： An apparatus comprising—an imaging component for acquiring magnetic resonance images;—a storage component for storing the magnetic resonance images in a stack;—a sorting component for sorting the magnetic resonance images in the stack using machine defined meta information of the images; and—an interface for reading the ordered stack.
摘要翻译： 一种装置，包括： - 用于获取磁共振图像的成像部件; - 用于将所述磁共振图像存储在堆叠中的存储部件; - 用于使用所述图像的机器定义的元信息对所述堆叠中的所述磁共振图像进行分类的分类部件; 和 - 用于读取有序堆栈的接口。
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34.发明授权Passive shims to increase the effective B0 and B1 uniformity in a body coil 有权被动垫片可增加身体线圈中有效的B0和B1均匀度公开(公告)号：US08704516B2
公开(公告)日：2014-04-22
申请号：US12808399
申请日：2008-12-22
CPC分类号： G01R33/3873 , G01R33/34007 , G01R33/341 , G01R33/3415 , G01R33/5659
摘要： A magnetic resonance imaging system (10) includes a local coil (40) for receiving a resonance signal induced by a whole body quadrature coil (32). The local coil (40) includes a dielectric former (68) in which a plurality of receive coils (60, 74, 76, 78) and a passive B0 and B1 field shim (62, 82) are mounted. The passive shim includes a plurality of capacitively coupled elements (64) of an electrically conductive diamagnetic, paramagnetic, ferromagnetic material which passively shield and enhance the field in local regions. A surface configuration of the elements is tailored to optimize local B1 homogeneity and a mass of the elements is configured to optimize local B0 field homogeneity.
摘要翻译： 磁共振成像系统（10）包括用于接收由全身正交线圈（32）感应的谐振信号的局部线圈（40）。 局部线圈（40）包括电介质成形器（68），其中安装有多个接收线圈（60,74,76,78）和无源B0和B1场垫片（62,82）。 被动垫片包括多个电容耦合元件（64），其导电的抗磁性，顺磁性的铁磁材料被动地屏蔽和增强局部区域中的场。 元件的表面配置被定制以优化局部B1均匀性，并且元件的质量被配置为优化局部B0场均匀性。
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公开(公告)号：US20130342207A1
公开(公告)日：2013-12-26
申请号：US14002549
申请日：2012-02-28
CPC分类号： G01R33/54 , G01R33/32 , G01R33/34076 , G01R33/3614 , G01R33/5605 , G01R33/5612 , G01R33/5659
摘要： The invention relates to a method of MR imaging of at least a portion of a body (110) of a patient placed in an examination volume of a MR device, the method comprising the steps of:—subjecting the portion of the body (110) to an imaging sequence comprising at least one RF pulse, the RF pulse being transmitted toward the portion of the body (110) via a RF coil arrangement (109) to which RF signals are supplied by two or more RF power amplifiers the RF power amplifiers being activated alternately during the imaging sequence in a time-multiplexed fashion, wherein the imaging sequence requires a RF duty cycle and/or a RF pulse duration exceeding the specification of at least one of the RF power amplifiers;—acquiring MR signals from the portion of the body (110); and—reconstructing a MR image from the acquired MR signals. Moreover, the invention relates to a method of MR spectroscopy involving the alternating use of RF power amplifiers in a time-multiplexed fashion.
摘要翻译： 本发明涉及放置在MR装置的检查体积中的患者的身体（110）的至少一部分的MR成像方法，该方法包括以下步骤： - 将身体部分（110） 涉及包括至少一个RF脉冲的成像序列，所述RF脉冲经由RF线圈装置（109）朝向身体（110）的部分传输，RF信号由两个或更多个RF功率放大器提供给RF功率放大器 在成像序列期间以时间复用的方式交替激活，其中所述成像序列需要超过RF功率放大器中的至少一个的规定的RF占空比和/或RF脉冲持续时间; - 从所述部分获取MR信号 的身体（110）; 并从所获取的MR信号重构MR图像。 此外，本发明涉及涉及以时分复用方式交替使用RF功率放大器的MR光谱的方法。
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公开(公告)号：US20130088229A1
公开(公告)日：2013-04-11
申请号：US13700137
申请日：2011-05-19
IPC分类号： G01R33/385 , G01R33/54
CPC分类号： G01R33/3852 , G01R33/285 , G01R33/288 , G01R33/54 , G01R33/5613
摘要： An magnetic resonance examination system for examination of an object comprises an RF system to generate an RF transmission field and gradient system to generate temporary magnet gradient fields. A control module includes a sequence controller to control the RF system and the gradient system to produce acquisition sequences including RF pulses and magnetic gradient pulses to generate magnetic resonance signals. The sequence controller is configured to produce an detection scan including a steady state gradient echo acquisition sequence to generate steady state gradient echo signals and an RF spoiled echo acquisition sequence to produce RF spoiled echo signals. The control module further including an analysis unit to compare the gradient echo signals to the RF spoiled echo signals and for detection of an instrument in the object from the comparison of the gradient echoes and the RF spoiled echoes.
摘要翻译： 用于检查物体的磁共振检查系统包括用于产生RF传输场的RF系统和用于产生临时磁体梯度场的梯度系统。 控制模块包括用于控制RF系统和梯度系统以产生包括RF脉冲和磁梯度脉冲的采集序列以产生磁共振信号的序列控制器。 序列控制器被配置为产生包括稳态梯度回波采集序列的检测扫描，以产生稳态梯度回波信号和RF损坏的回波采集序列以产生RF损坏回波信号。 控制模块还包括分析单元，用于将梯度回波信号与RF损坏的回波信号进行比较，并且用于通过梯度回波和RF损坏回波的比较来检测物体中的仪器。
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公开(公告)号：US20120070048A1
公开(公告)日：2012-03-22
申请号：US13320551
申请日：2010-06-03
IPC分类号： G06K9/00
CPC分类号： G06F19/321 , G06F19/00
摘要： An apparatus comprising—an imaging component for acquiring magnetic resonance images;—a storage component for storing the magnetic resonance images in a stack;—a sorting component for sorting the magnetic resonance images in the stack using machine defined meta information of the images; and—an interface for reading the ordered stack.
摘要翻译： 一种装置，包括： - 用于获取磁共振图像的成像部件; - 用于将所述磁共振图像存储在堆叠中的存储部件; - 用于使用所述图像的机器定义的元信息对所述堆叠中的所述磁共振图像进行分类的分类部件; 和 - 用于读取有序堆栈的接口。
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公开(公告)号：US07477054B2
公开(公告)日：2009-01-13
申请号：US11568280
申请日：2005-04-22
IPC分类号： G01V3/00
CPC分类号： G01R33/4828 , G01R33/287
摘要： A magnetic resonance imaging system comprises a receiver system to acquire magnetic resonance signals. A control system controls the receiver system to reform an acquisition sequence to acquire the magnetic resonance signals in several acquisition segments. Respective groups of acquisition segments involve acquisition of magnetic resonance signals in different RF-receiver frequency bands. In the respective groups of acquisition segments, magnetic resonance signals are acquired from different nuclei having different gyromagnetic ratios. According to the invention, reconstruction of different types of information carried by the respective nuclei is made possible. For example, imaging of the anatomy of a patient to be examined is performed on the basis of proton magnetic resonance imaging. Imaging of a targeted contrast agent is achieved on the basis of 19F magnetic resonance imaging. Localisation of a invasive device, such as a catheter, is also performed on the basis of e.g. 19F magnetic resonance imaging.
摘要翻译： 磁共振成像系统包括用于获取磁共振信号的接收器系统。 控制系统控制接收机系统改造采集序列以获取几个采集段中的磁共振信号。 获取段的各组涉及在不同的RF接收机频带中获取磁共振信号。 在相应的采集段组中，从具有不同回旋磁比的不同核获取磁共振信号。 根据本发明，由各个核承载的不同类型的信息的重构成为可能。 例如，基于质子磁共振成像进行被检查患者的解剖结构的成像。 在19F磁共振成像的基础上实现靶向造影剂的成像。 侵入性装置（例如导管）的定位也基于例如导管进行。 19F磁共振成像。
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公开(公告)号：US07417429B2
公开(公告)日：2008-08-26
申请号：US10547196
申请日：2004-02-18
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , G01R33/5611
摘要： A novel magnetic resonance imaging method is described, for forming an image of an object from a plurality of signals sampled in a restricted homogeneity region of a main magnet field of a magnetic resonance imaging apparatus. A patient disposed on a table is moved continuously through the bore of the main magnet and spins in a predetermined area of the patient are excited by an excitation pulse from a transmitter antenna, such that an image is formed over a region exceeding largely the restricted region. Data is undersampled in the restricted region by means off at least one receiver antenna in a plurality of receive situations being defined as a block of measurements contiguous in time having preserved magnetisation and presaturation conditions within the excited area of the patient. Fold-over artefacts due to said undersampling are unfolded by means of the known sensitivity pattern of the receiver antenna and/or the properties of selected factors determining said receive situations.
摘要翻译： 描述了一种新颖的磁共振成像方法，用于从在磁共振成像装置的主磁场的受限同质区域中采样的多个信号形成物体的图像。 设置在桌子上的患者连续移动通过主磁体的孔并且在患者的预定区域中的旋转被来自发射器天线的激励脉冲激发，使得在超过大部分限制区域的区域上形成图像 。 通过在多个接收情况中的至少一个接收机天线被限定为在时间上相邻的测量块，其在患者的激动区域内保持了磁化和预饱和状态，因此在受限区域中数据被欠采样。 由于所述欠采样引起的折叠伪影通过接收机天线的已知灵敏度图案和/或确定所述接收情况的选定因素的特性而展开。
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公开(公告)号：US07310548B2
公开(公告)日：2007-12-18
申请号：US10551068
申请日：2004-03-23
IPC分类号： A61B5/05
CPC分类号： G01R33/56341
摘要： The present invention relates to a method of perfusion imaging comprising: performing a first magnetic resonance data acquisition (A) at a first sensitivity (b) value, performing a set of at least six second magnetic resonance data acquisitions (B1, B2, . . . B6) with gradiant encodings in different directions at second sensitivity (b) values, determining a perfusion tensor based on the magnetic resonance data acquisitions, performing a perfusion tensor visualitation step.
摘要翻译： 本发明涉及一种灌注成像方法，包括：以第一灵敏度（b）值执行第一磁共振数据采集（A），执行一组至少六次第二磁共振数据采集（B < 在第二灵敏度（b）值下，以不同方向的梯度编码，确定基于磁共振的灌注张量（B），确定基于磁共振的灌注张量 数据采集，执行灌注张量视觉步骤。
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