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公开(公告)号：US20120001630A1
公开(公告)日：2012-01-05
申请号：US13221999
申请日：2011-08-31
申请人： Jeffrey L. DUERK , Jeffrye L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
发明人： Jeffrey L. DUERK , Jeffrye L. Sunshine , Mark A. Griswold , Jamal J. Derakhshan , Sherif G. Nour
IPC分类号： G01R33/30
CPC分类号： G01R33/5613 , G01R33/5607 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and spoiling residual transverse magnetization are described. The example systems, methods, and other embodiments are also associated with acquiring a dark blood image in response to the bSSFP technique. A dark blood image is one in which NMR signal acquired from an object subjected to the bSSFP technique and magnetization preparation includes NMR signal from flowing spins and NMR signal from non-flowing spins in a desired ratio.
摘要翻译： 描述了与控制磁共振成像（MRI）装置执行平衡的稳态自由进动（bSSFP）技术相关联的系统，方法和其他实施例，其包括具有差分速度编码和破坏残余横向磁化的磁化准备。 示例系统，方法和其他实施例也与响应于bSSFP技术获取深色血液图像相关联。 深色血液图像是其中从经受bSSFP技术和磁化制备的物体获得的NMR信号包含来自流动自旋的NMR信号和来自非流动自旋的NMR信号以期望的比例。
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公开(公告)号：US20090264730A1
公开(公告)日：2009-10-22
申请号：US12423932
申请日：2009-04-15
CPC分类号： A61B90/37 , A61B18/20 , A61B2090/374
摘要： Systems, methods, and other embodiments associated with tracking an ablative device and monitoring an ablation produced by the ablative device are described. One example method includes acquiring a magnetic resonance (MR) image of an ablative device inserted in a body and selectively controlling positioning of the ablative device based, at least in part on the MR image. The MR image may be continuously provided in real-time by an interventional MR imaging apparatus programmed to image using a tri-orthogonal plane sequence. The method may also include acquiring an MR image of an ablation performed by the ablative device, and selectively controlling the ablative device based, at least in part, on the MR image. The MR image may also be provided by the IMRI apparatus operating according to a tri-orthogonal plane sequence. In one example, the ablation may treat hypopharyngeal obstructive sleep apnea by reducing tongue base volume.
摘要翻译： 描述了跟踪消融装置并监测消融装置产生的消融的系统，方法和其它实施例。 一个示例性方法包括：至少部分地基于MR图像获取插入到体内的消融装置的磁共振（MR）图像，并选择性地控制消融装置的定位。 可以通过编程为使用三正交平面序列成像的介入MR成像设备来实时地连续提供MR图像。 该方法还可以包括获取消融装置进行的消融的MR图像，以及至少部分地基于MR图像选择性地控制消融装置。 MR图像也可以由根据三正交平面序列操作的IMRI设备提供。 在一个实例中，消融可以通过减少舌根体积来治疗下咽阻塞性睡眠呼吸暂停。
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公开(公告)号：US20090261825A1
公开(公告)日：2009-10-22
申请号：US12423941
申请日：2009-04-15
申请人： Jeffrey L. DUERK , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakshan , Sherif G. Nour
发明人： Jeffrey L. DUERK , Jeffrey L. Sunshine , Mark A. Griswold , Jamal J. Derakshan , Sherif G. Nour
CPC分类号： G01R33/5613 , G01R33/5607 , G01R33/5614
摘要： Systems, methods, and other embodiments associated with controlling a magnetic resonance imaging (MRI) apparatus to perform a balanced steady state free precession (bSSFP) technique that includes magnetization preparation with differentiated velocity encoding and spoiling residual transverse magnetization are described. The example systems, methods, and other embodiments are also associated with acquiring a dark blood image in response to the bSSFP technique. A dark blood image is one in which NMR signal acquired from an object subjected to the bSSFP technique and magnetization preparation includes NMR signal from flowing spins and NMR signal from non-flowing spins in a desired ratio.
摘要翻译： 描述了与控制磁共振成像（MRI）装置执行平衡的稳态自由进动（bSSFP）技术相关联的系统，方法和其他实施例，其包括具有差分速度编码和破坏残余横向磁化的磁化准备。 示例系统，方法和其他实施例也与响应于bSSFP技术获取深色血液图像相关联。 深色血液图像是其中从经受bSSFP技术和磁化制备的物体获得的NMR信号包含来自流动自旋的NMR信号和来自非流动自旋的NMR信号以期望的比例。
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4.发明申请公开(公告)号：US20090261827A1
公开(公告)日：2009-10-22
申请号：US12423952
申请日：2009-04-15
IPC分类号： G01R33/44
CPC分类号： G01R33/5613 , G01R33/4818 , G01R33/5614 , G01R33/56518
摘要： Systems methods, and other embodiments associated with acquiring intersecting TrueFISP images using grouped reverse centric phase encoding are described. One example method includes controlling an MRI apparatus to produce a TrueFISP sequence that delays acquisition of the center of k-space to reduce saturation banding artifacts. The example method also includes controlling the MRI apparatus to produce a TrueFISP sequence that reduces eddy current artifacts by grouping (e.g., pairing) lines in k-space. The method concludes by acquiring NMR signal in response to the TrueFISP sequence.
摘要翻译： 描述了使用分组反向中心相位编码获取相交的TrueFISP图像相关联的系统方法和其他实施例。 一个示例性方法包括控制MRI装置以产生延迟获取k空间的中心以减少饱和带状伪影的TrueFISP序列。 该示例性方法还包括控制MRI装置以产生通过在k空间中分组（例如，配对）线来减少涡流伪像的TrueFISP序列。 该方法通过响应于TrueFISP序列获得NMR信号得出结论。
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公开(公告)号：US20100066365A1
公开(公告)日：2010-03-18
申请号：US12624860
申请日：2009-11-24
IPC分类号： G01R33/48
CPC分类号： G01R33/5614 , G01R33/4828 , G01R33/5607 , G01R33/5613
摘要： The present invention is directed to methods for chemical species signal suppression in magnetic resonance imaging procedures, wherein Dixon techniques are enhanced by continuously sampling techniques. In the invention, k-space data is acquired during the entire period of read gradient associated with a gradient echo pulse acquisition scheme. The invention utilizes a total sampling time (TST) acquisition during the entire read gradient, using three echoes of a TST data set to achieve chemical species separation in both homogenous fields as well as areas of field inhomogeneity. As an example, a continuously sampled rectilinearly FLASH pulse sequence is modified such that the time between echoes was configured to be 2.2 milliseconds, with TE selected to allow 180° phase variation in the fat magnetization between each of the three TE's (TE1, TE2, and TE3). Data collected during the dephase and rephase gradient lobes are defined as a first Dixon acquisition, with data collected by the read gradient lobe being defined as a second Dixon acquisition. Two point Dixon reconstruction techniques are used to form images for each chemical species, such as for generating water and fat images of the scanned object region. Other corrections, such as off-resonance correction may be applied on the image data.
摘要翻译： 本发明涉及磁共振成像过程中化学物质信号抑制的方法，其中通过连续采样技术增强狄克逊技术。 在本发明中，在与梯度回波脉冲获取方案相关联的读取梯度的整个周期期间获取k空间数据。 本发明利用在整个读取梯度期间的总采样时间（TST）采集，使用TST数据集的三个回波来实现均匀场中的化学物质分离以及场不均匀性的区域。 作为示例，修改连续采样的直线FLASH脉冲序列，使得回波之间的时间被配置为2.2毫秒，其中TE被选择为允许三个TE（TE1，TE2，TE2，...中的每一个之间的脂肪磁化的180°相位变化） 和TE3）。 在去除和重新形成梯度波瓣期间收集的数据被定义为第一次Dixon采集，由读取梯度波段收集的数据被定义为第二次Dixon采集。 两点Dixon重建技术用于形成每个化学物种的图像，例如用于产生被扫描物体区域的水和脂肪图像。 可以对图像数据应用诸如非共振校正的其他校正。
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公开(公告)号：US20110158477A1
公开(公告)日：2011-06-30
申请号：US12890963
申请日：2010-09-27
CPC分类号： A61B5/055 , A61B5/7207 , G01R33/56509
摘要： A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided. The object is associated with a fiducial mark. The method provides a computer executable methodology for detecting a rotation and selectively reordering, deleting and/or reacquiring projection data.
摘要翻译： 提供了一种通过校正由成像对象的旋转运动引入的误差来提高图像质量的方法和系统。 对象与基准标记相关联。 该方法提供了用于检测旋转和选择性重排序，删除和/或重新获取投影数据的计算机可执行方法。
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公开(公告)号：US20100076301A1
公开(公告)日：2010-03-25
申请号：US12624903
申请日：2009-11-24
IPC分类号： A61B5/055
CPC分类号： G01R33/54
摘要： Systems, methodologies, media, and other embodiments associated with automatically adapting MRI controlling parameters are described. One exemplary method embodiment includes configuring an MRI apparatus to acquire MR signal data using a non-rectilinear trajectory. The example method may also include acquiring MR signals, transforming the MR signals into image data, and selectively adapting the MRI controlling parameters based, at least in part, on information associated with the MR signals.
摘要翻译： 描述了与自动适应MRI控制参数相关联的系统，方法，介质和其他实施例。 一个示例性方法实施例包括配置MRI装置以使用非直线轨迹来获取MR信号数据。 该示例性方法还可以包括获取MR信号，将MR信号变换为图像数据，以及至少部分地基于与MR信号相关联的信息来选择性地调整MRI控制参数。
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