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公开(公告)号：US06275035B1
公开(公告)日：2001-08-14
申请号：US09200165
申请日：1998-11-25
IPC分类号： G01V300
CPC分类号： G01R33/54
摘要： A method and apparatus for producing an imaging plane on an image of a structure of interest, such as an anatomical structure, positioned in an MRI system. An operator interactively pages through real-time, planar sections of the structure of interest. Using an input device, the operator selects three separate points in a planar section of the structure under study. Within approximately one second of selection of the third point, the method of the present invention determines the imaging plane containing the three selected points, determines the centroid of the imaging plane centered on a triangle defined by the three selected points, sends such imaging geometry and in-plane offsets of the imaging plane directly to the MRI system to generate a new imaging plane optimally positioned with respect to the selected points on the structure of interest and displaying such new imaging plane. The operator can also selectively maneuver the imaging plane on the image of the structure of interest. The operator uses a graphical user interface in conjunction with the input device and a display screen for producing the imaging plane on the structure of interest. Such graphical user interface is referred to as a three point tool.
摘要翻译： 一种用于在诸如解剖结构的感兴趣结构的图像上产生成像平面的方法和装置，其位于MRI系统中。 操作者通过交互式浏览感兴趣的结构的实时平面部分。 使用输入设备，操作员在正在研究的结构的平面部分中选择三个独立的点。 在第三点的选择大约一秒之内，本发明的方法确定包含三个选定点的成像平面，确定以由三个选定点定义的三角形为中心的成像平面的质心，发送这样的成像几何和 成像平面的面内偏移直接到MRI系统以产生相对于感兴趣的结构上的所选点最佳定位的新成像平面并且显示这种新的成像平面。 操作者还可以选择性地操纵感兴趣的结构的图像上的成像平面。 操作者使用与输入设备结合的图形用户界面和用于在感兴趣的结构上产生成像平面的显示屏幕。 这种图形用户界面被称为三点工具。
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公开(公告)号：US5584293A
公开(公告)日：1996-12-17
申请号：US515786
申请日：1995-08-16
CPC分类号： G01R33/54
摘要： Imaging parameters, such as the location, orientation and field of view of an imaging plane are selected. These parameters are provided to a pulse sequencer of a magnetic resonance (MR) scanner which modifies an MR pulse sequence to acquire an image at the selected imaging plane. The pulse sequencer controls an RF transmitter and gradient amplifiers to cause an MR image of the subject at an imaging plane to be acquired. The MR image is displayed on a display device. An interface device receives and reduces the MR image to an image icon and saves the image icon along with the corresponding imaging parameters. The image icons are displayed on the periphery of the screen around an MR image. An operator may then view and select one of the image icons, employing the pointing device. This causes the imaging parameters corresponding to the selected image icon to be sent to the pulse sequencer thereby causing an MR image to be acquired with these imaging parameters.
摘要翻译： 选择成像参数，例如成像平面的位置，方位和视场。 这些参数被提供给磁共振（MR）扫描器的脉冲序列器，其修改MR脉冲序列以获取所选成像平面上的图像。 脉冲序列发生器控制RF发射器和梯度放大器，以获得成像平面上的对象的MR图像。 MR图像显示在显示设备上。 接口装置将MR图像接收并减少到图像图标，并将图像图标与相应的成像参数一起保存。 图像图标显示在MR图像周围的屏幕周围。 然后，操作者可以使用指示设备来查看和选择一个图像图标。 这使得与所选择的图像图标相对应的成像参数被发送到脉冲序列器，从而使得利用这些成像参数获取MR图像。
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公开(公告)号：US5512826A
公开(公告)日：1996-04-30
申请号：US458601
申请日：1995-06-02
CPC分类号： G01R33/54 , G01R33/543 , G01R33/546
摘要： An MR image of a subject is displayed on a display device. Scan-control icons are displayed over this image. An operator interacts with an interface device to select imaging plane parameters during imaging. This is performed by selecting one of the icons with a pointing device, and dragging. Interface device then provides a display which indicates the motion of the imaging plane as well as the extent of the motion. Once selected, the location and orientation information transformed to global coordinates and is provided to a pulse sequencer of a magnetic resonance (MR) imaging system. The pulse sequencer controls an RF transmitter and gradient amplifiers to cause an MR image of the subject at an imaging plane to be acquired. This allows fast, accurate imaging plane selection, which may be selected by an operator who is searching for structures within the subject, or who is simultaneously performing a medical procedure on the subject.
摘要翻译： 主体的MR图像显示在显示装置上。 扫描控制图标显示在此图像上。 操作者与接口设备进行交互以在成像期间选择成像平面参数。 这是通过使用指点设备选择一个图标并拖动来执行的。 然后，接口装置提供指示成像平面的运动以及运动程度的显示器。 一旦被选择，将位置和方位信息变换为全局坐标并提供给磁共振（MR）成像系统的脉冲序列器。 脉冲序列发生器控制RF发射器和梯度放大器，以获得成像平面上的对象的MR图像。 这允许快速，精确的成像平面选择，其可以由正在搜索对象内的结构的操作者选择，或者同时对该对象执行医疗程序。
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公开(公告)号：US5365927A
公开(公告)日：1994-11-22
申请号：US146345
申请日：1993-11-02
申请人： Peter B. Roemer , Samuel M. Blumenfeld , Kirby G. Vosburgh , Harvey E. Cline , William D. Barber , William E. Lorensen , Richard L. St. Peters , John F. Schenck , Charles L. Dumoulin , Robert D. Darrow , Christopher J. Hardy
发明人： Peter B. Roemer , Samuel M. Blumenfeld , Kirby G. Vosburgh , Harvey E. Cline , William D. Barber , William E. Lorensen , Richard L. St. Peters , John F. Schenck , Charles L. Dumoulin , Robert D. Darrow , Christopher J. Hardy
IPC分类号： G01R33/48 , A61B5/055 , G01R33/28 , G01R33/38 , G01R33/385 , G01R33/54 , G01R33/563
CPC分类号： G01R33/385 , G01R33/3806 , G01R33/285 , G01R33/4804 , G01R33/543 , G01R33/563
摘要： A magnetic resonance (MR) imaging system for use in a medical procedure employs an open main magnet allowing access to a portion of a patient within an imaging volume, for producing a main magnetic field over the imaging volume; a set of open gradient coils which provide magnetic fields gradients over the imaging volume without restricting access to the imaging volume; a radiofrequency coil set for transmitting RF energy into the imaging volume to nutate nuclear spins within the imaging volume and receive an MR response signal from the nuclear spins; and a pointing device for indicating the position and orientation of a plane in which an image is to be acquired; an image control means for operating power supplies for the gradient coils and the RF coils to acquire an MR signal from the desired imaging plane; and a computation unit for constructing an image of the desired imaging plane. The MR imaging system is intended to operate to provide images to a physician during medical procedures to guide the physician in his procedures.
摘要翻译： 用于医疗过程的磁共振（MR）成像系统采用打开的主磁体，其允许进入成像体积内的患者的一部分，用于在成像体积上产生主磁场; 一组开放的梯度线圈，其在成像体积上提供磁场梯度，而不限制对成像体积的访问; 射频线圈组，用于将RF能量传输到成像体积中，以在成像体积内盘旋核自旋，并从核自旋接收MR响应信号; 以及指示装置，用于指示要获取图像的平面的位置和方位; 图像控制装置，用于操作梯度线圈和RF线圈的电源，以从期望的成像平面获取MR信号; 以及用于构造所需成像平面的图像的计算单元。 MR成像系统旨在在医疗程序期间向医生提供图像以在他的程序中指导医师。
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5.发明授权
公开(公告)号：US5512827A
公开(公告)日：1996-04-30
申请号：US460018
申请日：1995-06-02
CPC分类号： G01R33/54
摘要： A newly acquired MR image of an imaging subject is displayed on a display device. An operator interactively manipulates the imaging plane during imaging, by using a button, a rocker switch, a knob, and a trackball. The button enables or disables interactive scan-plane control. The rocker switch chooses between "translate", and "rotate" modes. In "translate" mode, the knob pushes the imaging plane deeper or shallower relative to the most recently displayed image, while the trackball slides the plane sideways and/or up and down. In "rotate" mode, the knob spins the imaging plane about the center of the most recently displayed image without changing the tilt of the plane, while the trackball tumbles or tilts the imaging plane. Colored icons displayed over the image change location, size, and/or shape to indicate the direction and extent of the translation or rotation. When motion of the knob or trackball ceases, or an acquire image button is pressed, the icon reassumes its default size, shape, and location, and the location and orientation information is transformed and provided to a pulse sequencer of a magnetic resonance (MR) imaging system. The pulse sequencer controls an RF transmitter and gradient amplifiers to cause an MR image of the subject at an imaging plane to be acquired. The new imaging-plane location is then used for all subsequent images, until another change is made.
摘要翻译： 在显示装置上显示摄像对象的新获取的MR图像。 操作者通过使用按钮，摇杆开关，旋钮和轨迹球在成像期间交互地操纵成像平面。 该按钮启用或禁用交互式扫描平面控制。 摇杆开关在“平移”和“旋转”模式之间进行选择。 在“翻译”模式中，旋钮将成像平面相对于最近显示的图像更深或更浅，同时轨迹球横向滑动平面和/或上下滑动。 在“旋转”模式下，旋钮将成像平面围绕最近显示的图像的中心旋转，而不会改变平面的倾斜，而轨迹球会翻转或倾斜成像平面。 在图像上显示的彩色图标更改位置，大小和/或形状，以指示翻译或旋转的方向和范围。 当旋钮或轨迹球的运动停止或按下获取的图像按钮时，图标重新确定其默认尺寸，形状和位置，并且将位置和方向信息变换并提供给磁共振（MR）的脉冲序列器， 成像系统。 脉冲序列发生器控制RF发射器和梯度放大器，以获得成像平面上的对象的MR图像。 然后将新的成像平面位置用于所有后续图像，直到进行另一个改变。
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6.发明授权Method for blood flow acceleration and velocity measurement using MR catheters 失效使用MR导管进行血流加速和速度测量的方法
公开(公告)号：US5445151A
公开(公告)日：1995-08-29
申请号：US264281
申请日：1994-06-23
CPC分类号： A61B5/0263 , G01F1/716 , G01P5/18 , G01R33/285 , G01R33/34084 , G01R33/56308
摘要： A method of magnetic resonance (MR) fluid flow measurement within a subject employs an invasive device with an RF transmit/receive coil and an RF transmit coil spaced a known distance apart. The subject is positioned in a static magnetic field. The invasive device is positioned in a vessel of a subject in which fluid flow is desired to be determined. A regular pattern of RF transmission pulses are radiated through the RF transmit/receive coil causing it to cause a steady-state MR response signal. Intermittently a second RF signal is transmitted from the RF coil positioned upstream which causes a change in the steady-state MR response signal sensed by the downstream transmit/receive coil. This is detected a short delay time later at the RF receive coil. The time delay and the distance between the RF coils leads directly to a fluid velocity. By exchanging the position of the RF transmit and transmit/receive coils, retrograde velocity may be measured. In another embodiment, more RF coils are employed. The changed MR response signal may be sensed at a number of locations at different times, leading to a measured change in velocity, or acceleration of the fluid.
摘要翻译： 在受试者内的磁共振（MR）流体流量测量的方法使用具有RF发射/接收线圈和间隔已知距离的RF发射线圈的侵入性装置。 被摄体位于静态磁场中。 将侵入性装置定位在需要确定流体流动的受试者的血管中。 通过RF发射/接收线圈辐射RF传输脉冲的规则图案，使其产生稳态MR响应信号。 间歇地从位于上游的RF线圈发送第二RF信号，引起下游发射/接收线圈感测到的稳态MR响应信号的变化。 在RF接收线圈之后检测到短时间延迟时间。 时间延迟和RF线圈之间的距离直接导致流体速度。 通过交换RF发射和发射/接收线圈的位置，可以测量逆行速度。 在另一个实施例中，采用更多的RF线圈。 可以在不同时间的多个位置处感测改变的MR响应信号，导致测量的流体变化或流体的加速度。
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7.发明授权Display system for enhancing visualization of body structures during medical procedures 失效用于增强医疗过程中身体结构可视化的显示系统
公开(公告)号：US5526812A
公开(公告)日：1996-06-18
申请号：US549320
申请日：1995-10-27
CPC分类号： G06F3/013 , A61B90/36 , G06F19/3406 , A61B2090/371 , A61B2090/372 , G06F19/3481
摘要： An interactive display system superimposes images of internal structures on a semi-transparent screen through which a surgeon views a patient during a medical procedure. The superimposed image is derived from image data obtained with an imaging system. An invasive device is also tracked and displayed on the semi-transparent screen. A ray extending through the invasive device can also be displayed which shows the intended path of the invasive device. The image is registered with the surgeon's view of the patient and displayed in real-time during a medical procedure. This allows the surgeon to view internal and external structures, the relation between them, the proposed path of the invasive device, and adjust the procedure accordingly. A second embodiment employs stereoscopic viewing methods to provide three-dimensional representations of the radiological images superimposed on the semi-transparent screen through which the surgeon views the patient.
摘要翻译： 交互式显示系统将内部结构的图像叠加在半透明屏幕上，外科医生通过该半透明屏幕在医疗过程期间观察患者。 叠加的图像是从用成像系统获得的图像数据导出的。 还会在半透明屏幕上跟踪并显示有创设备。 还可以显示延伸穿过侵入性装置的射线，其显示侵入性装置的预期路径。 图像被注册到外科医生对病人的看法，并在医疗过程中实时显示。 这允许外科医生查看内部和外部结构，它们之间的关系，所建议的侵入性装置的路径，并相应地调整程序。 第二实施例采用立体观看方法来提供叠加在外科医生通过该半透明屏幕观察病人的半透明屏幕上的放射学图像的三维表示。
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8.发明授权
公开(公告)号：US5318025A
公开(公告)日：1994-06-07
申请号：US861690
申请日：1992-04-01
IPC分类号： A61B5/055 , A61B5/06 , A61B19/00 , G01R33/28 , G01R33/32 , G01R33/561 , G01R33/563
CPC分类号： A61B5/06 , A61B5/055 , G01R33/285 , G01R33/563 , A61B2090/3958 , G01R33/5617
摘要： A tracking system employs magnetic resonance signals to monitor the position and orientation of at least one device such as a catheter within a subject. The device has a plurality of receiver coils which are sensitive to magnetic resonance signals generated in the subject. These signals are detected in the presence of magnetic field gradients and thus have frequencies which are substantially proportional to the location of the coil along the direction of the applied gradient. Signals are detected responsive to sequentially applied mutually orthogonal magnetic gradients to determine the device's position and orientation in several dimensions. The position and orientation of the device as determined by the tracking system is superimposed upon independently acquired medical diagnostic images. One or more devices can be simultaneously tracked.
摘要翻译： 跟踪系统采用磁共振信号来监测至少一个装置（例如对象内的导管）的位置和取向。 该装置具有对受试者中产生的磁共振信号敏感的多个接收线圈。 在存在磁场梯度的情况下检测这些信号，因此具有与沿施加的梯度方向的线圈位置基本成比例的频率。 响应于顺序施加的相互正交的磁梯度来检测信号，以在几个维度中确定装置的位置和取向。 由跟踪系统确定的设备的位置和方向被叠加在独立获取的医学诊断图像上。 可以同时跟踪一个或多个设备。
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公开(公告)号：US5255680A
公开(公告)日：1993-10-26
申请号：US753567
申请日：1991-09-03
CPC分类号： A61B5/06 , A61B34/20 , A61B6/12 , A61B6/4476 , A61B2034/2051 , A61B2090/365 , A61B90/37
摘要： A tracking system which measures the position and orientation of invasive devices is used to automatically control the location of the X-ray imaging system gantry and/or patient table. The position and orientation of the invasive device, such as a catheter, are measured by detection of a radiofrequency field generated by the invasive device. The invasive device has at least one transmit coil attached near its end and is driven by a low power RF source to produce a dipole electromagnetic field that can be detected by an array of receive coils distributed around a region of interest. Automatic gantry placement facilitates medical diagnostic and therapeutic X-ray procedures and in some instances can reduce the number of personnel required to perform these procedures.
摘要翻译： 用于测量侵入性装置的位置和方向的跟踪系统用于自动控制X射线成像系统机架和/或患者台的位置。 侵入性装置（例如导管）的位置和取向通过检测由侵入性装置产生的射频场来测量。 侵入性装置具有附近的至少一个发射线圈，并且由低功率RF源驱动，以产生偶极电磁场，该偶极电磁场可通过分布在感兴趣区域周围的接收线圈阵列来检测。 自动龙门架放置有助于医疗诊断和治疗X射线程序，并且在某些情况下可以减少执行这些程序所需的人员数量。
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10.发明申请TECHNIQUES FOR CORRECTING TEMPERATURE MEASUREMENT IN MAGNETIC RESONANCE THERMOMETRY 审中-公开用于校正磁共振热分析中温度测量的技术公开(公告)号：US20110046475A1
公开(公告)日：2011-02-24
申请号：US12546269
申请日：2009-08-24
IPC分类号： A61B5/055
CPC分类号： G01R33/4804 , G01R33/24 , G01R33/243 , G01R33/4814 , G01R33/565 , G01R33/56509 , G01R33/56563 , G01R33/58
摘要： Techniques for correcting temperature measurement in MR thermometry are disclosed. In particular, phase shifts that arise from factors other than temperature changes are detected, facilitating correction of temperature measurements.
摘要翻译： 公开了用于校正MR测温中的温度测量的技术。 特别地，检测出由温度变化以外的因素引起的相移，便于校正温度测量。
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