公开(公告)号：US09014781B2

公开(公告)日：2015-04-21

申请号：US13451178

申请日：2012-04-19

申请人： Ek Tsoon Tan ,  Thomas Kwok-Fah Foo ,  Vincent B. Ho

发明人： Ek Tsoon Tan ,  Thomas Kwok-Fah Foo ,  Vincent B. Ho

IPC分类号： A61B5/055 ,  A61B5/026

CPC分类号： A61B5/055 ,  A61B5/0263

摘要： Systems and methods for Magnetic Resonance Angiography (MRI) are provided. One method includes obtaining Magnetic Resonance (MR) velocity data and determining a distance map for one or more vessels to define a distance path. The method also includes calculating, using the MR velocity data, at a plurality of time intervals and for a plurality of pixels (i) a distance traveled during a current time interval as a current distance traveled, wherein a total distance traveled is incremented by the current distance traveled and (ii) a bolus signal using a bolus signal profile, the distance path and total distance traveled, wherein a current time interval is incremented by a defined time step.

摘要翻译： 提供了磁共振血管造影（MRI）的系统和方法。 一种方法包括获得磁共振（MR）速度数据并且确定一个或多个容器的距离图以限定距离路径。 该方法还包括以多个时间间隔和多个像素（i）计算使用MR速度数据在当前时间间隔内行进的距离作为行进的当前距离，其中行进的总距离增加 当前距离行进，以及（ii）使用推注信号轮廓的推注信号，所述距离路径和所行驶的总距离，其中当前时间间隔增加定义的时间步长。

公开(公告)号：US20130281829A1

公开(公告)日：2013-10-24

申请号：US13451178

申请日：2012-04-19

申请人： Ek Tsoon Tan ,  Thomas Kwok-Fah Foo ,  Vincent B. Ho

发明人： Ek Tsoon Tan ,  Thomas Kwok-Fah Foo ,  Vincent B. Ho

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0263

摘要： Systems and methods for Magnetic Resonance Angiography (MRI) are provided. One method includes obtaining Magnetic Resonance (MR) velocity data and determining a distance map for one or more vessels to define a distance path. The method also includes calculating, using the MR velocity data, at a plurality of time intervals and for a plurality of pixels (i) a distance traveled during a current time interval as a current distance traveled, wherein a total distance traveled is incremented by the current distance traveled and (ii) a bolus signal using a bolus signal profile, the distance path and total distance traveled, wherein a current time interval is incremented by a defined time step.

摘要翻译： 提供了磁共振血管造影（MRI）的系统和方法。 一种方法包括获得磁共振（MR）速度数据并且确定一个或多个容器的距离图以限定距离路径。 该方法还包括以多个时间间隔和多个像素（i）计算使用MR速度数据在当前时间间隔内行进的距离作为行进的当前距离，其中行进的总距离增加 当前距离行进，以及（ii）使用推注信号轮廓的推注信号，所述距离路径和所行驶的总距离，其中当前时间间隔增加定义的时间步长。

公开(公告)号：US6057680A

公开(公告)日：2000-05-02

申请号：US991820

申请日：1997-12-17

申请人： Thomas Kwok-Fah Foo ,  Vincent B. Ho

发明人： Thomas Kwok-Fah Foo ,  Vincent B. Ho

IPC分类号： G01R33/48 ,  A61B5/055 ,  G01R33/567 ,  G01V3/00

CPC分类号： G01R33/4833 ,  G01R33/5673

摘要： A method is provided for acquiring MR image data pertaining to a coronary artery which is in motion between end-diastolic and end-systolic maximum excursion positions, respectively, during a cardiac cycle. The method comprises the step of tracking the location of the artery during the cardiac cycle as the artery moves between the positions of maximum excursion. The method further comprises acquiring MR data at a number of locations during the cardiac cycle in a region lying between the maximum excursion positions, each having the excitation or acquisition scan locations adjusted during the MR scan so as to substantially coincide with the location of said artery at the time of data acquisition.

摘要翻译： 提供了一种用于在心动周期期间分别获取与冠状动脉相关的MR图像数据的方法，该冠状动脉在舒张末期和收缩期最大偏移位置之间运动。 该方法包括当动脉在最大偏移的位置之间移动时跟踪心动周期期间动脉的位置的步骤。 该方法还包括在位于最大偏移位置之间的区域中的心脏周期的多个位置处获取MR数据，每个位置具有在MR扫描期间调整的激发或采集扫描位置，以便与所述动脉的位置基本一致 在数据采集时。

公开(公告)号：US09554707B2

公开(公告)日：2017-01-31

申请号：US13539240

申请日：2012-06-29

申请人： Thomas Kwok-Fah Foo ,  Christopher Judson Hardy ,  Manjeshwar Mohan Ravindra

发明人： Thomas Kwok-Fah Foo ,  Christopher Judson Hardy ,  Manjeshwar Mohan Ravindra

IPC分类号： A61B5/00 ,  A61B5/055 ,  G01R33/483 ,  G01R33/48 ,  A61B6/03 ,  A61B6/00 ,  G01R33/54 ,  G01R33/563

CPC分类号： A61B5/0035 ,  A61B5/055 ,  A61B6/037 ,  A61B6/4417 ,  G01R33/481 ,  G01R33/4824 ,  G01R33/483 ,  G01R33/546 ,  G01R33/56383

摘要： Exemplary embodiments are directed to acquiring multiple sets of positron emission tomography (PET) data for different areas of a subject concurrently with acquiring portions of a single magnetic resonance field of view. Positron emission tomography (PET) images and magnetic resonance (MR) images can be acquired using a combined PET-MRI scanner, wherein, for example, a first portion of MR data from a MR field of view can be acquired concurrently with a first acquisition of PET data, a position of the MR field of view can be adjusted in response to a change in a location of a bed in the combined PET-MRI scanner, and a second portion of MR data from the MR field of view can be acquired concurrently with a second acquisition of PET data.

摘要翻译： 示例性实施例涉及在获取单个磁共振视野的部分的同时获取对象的不同区域的多组正电子发射断层摄影（PET）数据。 可以使用组合的PET-MRI扫描仪获取正电子发射断层摄影（PET）图像和磁共振（MR）图像，其中，例如，可以与第一次采集同时获取来自MR视野的MR数据的第一部分 的PET数据，可以响应于组合的PET-MRI扫描仪中的床的位置的变化来调整MR视场的位置，并且可以获取来自MR视场的MR数据的第二部分 同时第二次获取PET数据。

公开(公告)号：US20140079304A1

公开(公告)日：2014-03-20

申请号：US13618079

申请日：2012-09-14

申请人： Thomas Kwok-Fah Foo ,  Christopher Judson Hardy ,  Albert Henry Roger Lonn ,  Ravindra Mohan Manjeshwar ,  Dattesh Dayanand Shanbhag ,  Sheshadri Thiruvenkadam

发明人： Thomas Kwok-Fah Foo ,  Christopher Judson Hardy ,  Albert Henry Roger Lonn ,  Ravindra Mohan Manjeshwar ,  Dattesh Dayanand Shanbhag ,  Sheshadri Thiruvenkadam

IPC分类号： G06K9/00

CPC分类号： G06T11/008 ,  G06T7/11 ,  G06T7/12 ,  G06T2207/10088 ,  G06T2207/10104 ,  G06T2207/20221 ,  G06T2207/30061

摘要： Exemplary embodiments of the present disclosure are directed to correcting lung density variations in positron emission tomography (PET) images of a subject using a magnetic resonance (MR) image. A pulmonary vasculature and an outer extent of a lung cavity can be identified in a MR image corresponding to a thoracic region of the subject in response to an intensity associated with pixels in the MR image. The pixels within the outer extent of the lung cavity are classified as corresponding to the pulmonary vasculature or the lung tissue. Exemplary embodiments of the present disclosure can apply attenuation coefficients to a reconstruction of the PET image based on the classification of the pixels within the outer extent of the lung cavity.

摘要翻译： 本公开的示例性实施例涉及使用磁共振（MR）图像校正受试者的正电子发射断层摄影（PET）图像中的肺密度变化。 响应于与MR图像中的像素相关联的强度，可以在对应于受试者的胸部区域的MR图像中识别肺部脉管系统和肺腔的外部范围。 肺腔外部范围内的像素被分类为对应于肺血管或肺组织。 本公开的示例性实施例可以基于肺腔外部范围内的像素的分类，将衰减系数应用于PET图像的重建。

公开(公告)号：US20130320981A1

公开(公告)日：2013-12-05

申请号：US13484816

申请日：2012-05-31

申请人： Selaka Bandara Bulumulla ,  Thomas Kwok-Fah Foo ,  Christopher Judson Hardy

发明人： Selaka Bandara Bulumulla ,  Thomas Kwok-Fah Foo ,  Christopher Judson Hardy

IPC分类号： G01R33/44 ,  H01F7/06

CPC分类号： G01R33/34084 ,  G01R33/34007 ,  G01R33/3415 ,  H01F5/003 ,  H01F2017/006 ,  Y10T29/49073

摘要： An imaging system is presented. The imaging system includes a cradle, and a first sheet of coils disposed inside of the cradle such that a first end of the first sheet of coils protrudes out of the cradle and a second end of the first sheet of coils is coupled to a structure, wherein a requisite expanse of the first sheet of coils is flexibly pulled out from the cradle by pulling the first end.

摘要翻译： 提出了一种成像系统。 成像系统包括支架，以及布置在托架内部的第一片线圈，使得第一片线圈的第一端突出到支架之外，并且第一片线圈的第二端联接到结构， 其中通过拉动所述第一端部将所述第一片线圈的必要的宽度从所述支架中灵活地拉出。

公开(公告)号：US20120306494A1

公开(公告)日：2012-12-06

申请号：US13149760

申请日：2011-05-31

申请人： Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

发明人： Xing Yang ,  Teck Beng Desmond Yeo ,  Xu Chu ,  Thomas Kwok-Fah Foo ,  Jing Wu

IPC分类号： G01R33/44

CPC分类号： G01R33/3664 ,  G01R33/3415 ,  G01R33/4804 ,  G01R33/4808

摘要： A system including a plurality of coil elements is provided. Each coil element is arranged with a first switch and a second switch. In a first mode, the first switch and the second switch are turned off to split each coil element into a first coil portion and a second coil portion, to transmit first radio frequency signals. In a second mode, the first switch and second switch are turned on to transform each coil element into a loop coil to simultaneously transmit or receive multiple second radio frequency signals.

摘要翻译： 提供一种包括多个线圈元件的系统。 每个线圈元件配置有第一开关和第二开关。 在第一模式中，关闭第一开关和第二开关，以将每个线圈元件分成第一线圈部分和第二线圈部分，以发射第一射频信号。 在第二模式中，第一开关和第二开关导通，以将每个线圈元件变换成环形线圈，以同时发送或接收多个第二射频信号。

公开(公告)号：US08311641B2

公开(公告)日：2012-11-13

申请号：US12328444

申请日：2008-12-04

申请人： Yudong Zhu ,  Thomas Kwok-Fah Foo

发明人： Yudong Zhu ,  Thomas Kwok-Fah Foo

IPC分类号： A61F2/00

CPC分类号： A61B5/055 ,  A61N1/403

摘要： A method and apparatus for generating a localized heating are provided, the method comprising: transmitting a spatially localized or shaped electromagnetic field via a plurality of coils to a subject and generating magnetic resonance signals; performing magnetic resonance imaging based on the magnetic resonance signals to generate an image of a region of interest of the subject; and controlling the plurality of the same imaging coils to radiate radio frequency (rf) energy to generate the localized heating on a region of interest. The invention provide a more efficient manner for generating localized heating and means for verifying the heating pattern without the need to measure temperature rises in the patient. This is useful to check the localization prior to the application of hyperthermia.

摘要翻译： 提供了一种用于产生局部加热的方法和装置，所述方法包括：经由多个线圈将空间局部或成形的电磁场传送到对象并产生磁共振信号; 基于所述磁共振信号执行磁共振成像以产生所述对象的感兴趣区域的图像; 并且控制多个相同的成像线圈以辐射射频（rf）能量以在感兴趣的区域上产生局部加热。 本发明提供了用于产生局部加热的更有效的方式和用于验证加热图案的装置，而不需要测量患者的温度升高。 这对于检查应用热疗之前的定位是有用的。

公开(公告)号：US20110210734A1

公开(公告)日：2011-09-01

申请号：US12713924

申请日：2010-02-26

申请人： Robert David Darrow ,  Thomas Kwok-Fah Foo ,  Rakesh Mullick ,  Vivek Prabhakar Vaidya

发明人： Robert David Darrow ,  Thomas Kwok-Fah Foo ,  Rakesh Mullick ,  Vivek Prabhakar Vaidya

IPC分类号： G01R33/48 ,  G06K9/62

CPC分类号： G01R33/543 ,  G06K9/6284

摘要： A system and method for MR image scan and analysis include an MRI apparatus that includes a magnetic resonance imaging (MRI) system and a computer programmed to automatically prescribe a first scanning protocol based on the selected examination, acquire a first set of MR data of an imaging object via application of the first scanning protocol, and reconstruct a first image from the first set of MR data. The computer is also programmed to automatically prescribe a second scanning protocol based on the first image, acquire a second set of MR data of the imaging object via application of the second scanning protocol, reconstruct a second image from the second set of MR data, and quantify a first parameter of the imaging object based on the second image.

摘要翻译： 用于MR图像扫描和分析的系统和方法包括MRI装置，其包括磁共振成像（MRI）系统和被编程为基于所选择的检查自动规定第一扫描协议的计算机，获取第一组MR数据 通过应用第一扫描协议的成像对象，并且从第一组MR数据重建第一图像。 计算机还被编程为基于第一图像自动规定第二扫描协议，通过应用第二扫描协议获取成像对象的第二组MR数据，从第二组MR数据重建第二图像，以及 基于第二图像量化成像对象的第一参数。

公开(公告)号：US08942931B2

公开(公告)日：2015-01-27

申请号：US13174010

申请日：2011-06-30

申请人： Selaka Bandara Bulumulla ,  Laura Sacolick ,  Desmond Teck Beng Yeo ,  Seung-Kyun Lee ,  Thomas Kwok-Fah Foo ,  William Dixon

发明人： Selaka Bandara Bulumulla ,  Laura Sacolick ,  Desmond Teck Beng Yeo ,  Seung-Kyun Lee ,  Thomas Kwok-Fah Foo ,  William Dixon

IPC分类号： G01R15/00 ,  G01R33/24 ,  G01R33/28

CPC分类号： G01R33/246 ,  G01R33/288

摘要： A system and method for determining electrical properties using Magnetic Resonance Imaging (MRI) are provided. One method includes determining a magnitude of an MRI B1+ field applied to an object, determining a phase of the MRI B1+ field applied to the object and combining the determined magnitude and phase to determine a complex B1+ field estimate. The method further includes estimating one or more electrical properties of the object using the complex B1+ field estimate by directly solving at least one difference equation.

摘要翻译： 提供了使用磁共振成像（MRI）来确定电性能的系统和方法。 一种方法包括确定施加到对象的MRI B1 +场的大小，确定施加到对象的MRI B1 +场的相位，并组合确定的幅度和相位以确定复合B1 +场估计。 该方法还包括通过直接求解至少一个差分方程，使用复数B1 +场估计来估计物体的一个或多个电特性。