公开(公告)号：US06643534B2

公开(公告)日：2003-11-04

申请号：US10098013

申请日：2002-03-13

申请人： Thomas K.F. Foo ,  Vincent B. Ho ,  Rebecca A. McCann

发明人： Thomas K.F. Foo ,  Vincent B. Ho ,  Rebecca A. McCann

IPC分类号： A61B5055

CPC分类号： G01R33/563 ,  G01R33/281

摘要： A system and method for optimally imaging the peripheral vasculature is disclosed which includes defining a given number of scan stations along a patient's peripheral vasculature and initially injecting a relatively small amount of contrast agent into the patient to pass a test bolus through the patient's peripheral vasculature, and thereafter tracking the test bolus through the patient and adjusting the patient on a moveable table within the MR imaging device from one scan station to a next station to determine a maximum travel time that the test bolus takes to travel through each of the given number of scan stations. Additional contrast agent is then injected into the patient to pass an exam bolus through the patient's peripheral vasculature, and using the test bolus travel time, MR data can be acquired from each scan station while it is known that the exam bolus is present in that station to optimize image resolution. Initially, central k-space data is acquired for each scan station, and if time permits, the higher spatial frequency k-space data can be acquired. Otherwise, once the central k-space data is acquired for each station, the patient table is adjusted to the scan stations that require additional data acquisition. Similarly, if there is time remaining after all MR data is acquired for a particular scan station, the patient table can be moved to a previous scan station to acquire additional data in that station before moving to a subsequent scan station to acquire the central k-space data when the exam bolus arrives in that particular scan station.

公开(公告)号：US20100329527A1

公开(公告)日：2010-12-30

申请号：US12493600

申请日：2009-06-29

申请人： Joseph Iannotti ,  Thomas K.F. Foo ,  Steven Go ,  Kevin Dufel

发明人： Joseph Iannotti ,  Thomas K.F. Foo ,  Steven Go ,  Kevin Dufel

IPC分类号： G06K9/00 ,  G11B5/127

CPC分类号： G01R33/3621 ,  G01R33/3685

摘要： An apparatus includes a first magnetic resonance (MR) coil element configured to output a first set of MR data at a first output frequency and a first mixer coupled to the first MR coil element. The first mixer is configured to receive the first set of MR data from the first MR coil element and frequency translate the first set of MR data to a first offset frequency different from the first output frequency by a first offset value. The apparatus also includes a digitizer coupled to the first mixer and configured to convert the frequency-translated first set of MR data into a set of digital data and a transmission line coupled to the first mixer and to the digitizer, the transmission line configured to transmit the frequency-translated first set of MR data from the MR coil element to the digitizer without a balun coupled to the transmission line.

摘要翻译： 一种装置包括第一磁共振（MR）线圈元件，其被配置为以第一输出频率输出第一组MR数据，以及耦合到第一MR线圈元件的第一混频器。 第一混频器被配置为从第一MR线圈元件接收第一组MR数据，并将第一组MR数据频率平移到与第一输出频率不同的第一偏移频率第一偏移值。 该装置还包括耦合到第一混频器的数字转换器，其被配置为将经频率转换的第一组MR数据转换成一组数字数据和耦合到第一混频器和数字转换器的传输线，该传输线被配置为传输 来自MR线圈元件的数字转换器的频率转换的第一组MR数据，而不连接到传输线的平衡 - 不平衡变换器。

公开(公告)号：US20100128947A1

公开(公告)日：2010-05-27

申请号：US12323594

申请日：2008-11-26

申请人： Vivek Vaidya ,  Rakesh Mullick ,  Shekhar Dwivedi ,  Thomas K.F. Foo ,  Christopher Judson Hardy ,  Daniel James Blezek ,  Umesha Perdoor Srinivas Adiga

发明人： Vivek Vaidya ,  Rakesh Mullick ,  Shekhar Dwivedi ,  Thomas K.F. Foo ,  Christopher Judson Hardy ,  Daniel James Blezek ,  Umesha Perdoor Srinivas Adiga

IPC分类号： G06K9/00 ,  A61B5/05

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B6/032 ,  A61B6/503 ,  A61B8/14 ,  G06T7/75 ,  G06T2207/10088 ,  G06T2207/30048

摘要： An apparatus, system and method to determine a coordinate system of a heart includes an imager and a computer. The computer is programmed to acquire a first set of initialization imaging data from an anatomical region of a free-breathing subject. A portion of the first set of initialization imaging data includes organ data, which includes cardiac data. The computer is further programmed to determine a location of a central region of a left ventricle of a heart, where the location is based on the organ data and a priori information. The computer is also programmed to determine a short axis of the left ventricle based on the determined location, acquire a first set of post-initialization imaging data from the free-breathing subject from an imaging plane orientation based on the determination of the short axis, and reconstruct at least one image from the first set of post-initialization imaging data.

摘要翻译： 用于确定心脏坐标系的装置，系统和方法包括成像器和计算机。 计算机被编程为从自由呼吸对象的解剖区域获取第一组初始化成像数据。 第一组初始化成像数据的一部分包括包括心脏数据的器官数据。 计算机还被编程为确定心脏左心室的中心区域的位置，其中位置基于器官数据和先验信息。 计算机还被编程为基于确定的位置来确定左心室的短轴，基于短轴的确定，从成像平面取向获取来自自由呼吸对象的第一组初始初始化后成像数据， 并且从所述第一组初始化后成像数据重建至少一个图像。

公开(公告)号：US20090256568A1

公开(公告)日：2009-10-15

申请号：US12101279

申请日：2008-04-11

申请人： Florian Wiesinger ,  Thomas K.F. Foo ,  Mika Vogel ,  Dirk Lange

发明人： Florian Wiesinger ,  Thomas K.F. Foo ,  Mika Vogel ,  Dirk Lange

IPC分类号： G01R33/48

CPC分类号： G01R33/56316 ,  G01R33/243 ,  G01R33/56518 ,  G01R33/56581

摘要： A system and method of phase contrast imaging includes a system control programmed to acquire a first set of data and a second set of data via the RF coil assembly during a scan and acquire a third set of data and a fourth set of data via the plurality of magnetic field monitoring devices during the scan. A first single data set from the first and third sets of data is formed, and a second single data set from the second and fourth sets of data is formed. The system control is also programmed to reconstruct a phase contrast image based on the first and second single data sets to correct for spatially-dependent background phase variations.

摘要翻译： 相位对比成像的系统和方法包括被编程以在扫描期间经由RF线圈组件获取第一组数据和第二组数据的系统控制，并经由多个数据采集第三组数据和第四组数据 的磁场监测装置。 形成来自第一和第三组数据的第一单个数据集，并且形成来自第二和第四组数据的第二单个数据集。 系统控制也被编程为基于第一和第二单个数据集重建相位对比图像，以校正空间相关的背景相位变化。

公开(公告)号：US20080224697A1

公开(公告)日：2008-09-18

申请号：US12098866

申请日：2008-04-07

申请人： Manojkumar Saranathan ,  Thomas K.F. Foo

发明人： Manojkumar Saranathan ,  Thomas K.F. Foo

IPC分类号： G01R33/48

CPC分类号： G01R33/54 ,  G01R33/4818 ,  G01R33/5607 ,  G01R33/563 ,  G01R33/5635

摘要： The present invention provides a system and method of enhanced magnetic preparation in MR imaging. An imaging technique is disclosed such that k-space is segmented into a number of partitions, wherein the central regions of k-space is acquired prior to the periphery of k-space. The imaging technique also includes the application of magnetic preparation pulses at a variable rate. In this regard, the rate of application of magnetic preparations pulses is varied as a function of the distance from the center of k-space. The amplitude of the magnetic preparation pulses is also varied based on the incremental distance of a partition from the center of k-space.

摘要翻译： 本发明提供了一种在MR成像中增强磁性制备的系统和方法。 公开了一种成像技术，使得k空间被分割成多个分区，其中在空间的周边之前获取k空间的中心区域。 成像技术还包括以可变速率应用磁性制备脉冲。 在这方面，磁性制剂脉冲的施加速率随着与k空间中心的距离而变化。 磁准备脉冲的幅度也根据分区与k空间中心的增量距离而变化。