公开(公告)号：US08736265B2

公开(公告)日：2014-05-27

申请号：US13063472

申请日：2009-09-10

申请人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

发明人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

IPC分类号： G01R33/34

CPC分类号： G01R33/583 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/4838 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/586

摘要： The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume.

摘要翻译： 本发明涉及一种获取MRI图像数据的方法，包括以下步骤：使用第一体素大小执行第一体积的3维B1映射，选择MRI协议，根据MRI协议执行B1-垫片， 执行MRI协议以使用第二体素尺寸获取第二体积的MRI成像数据，其中所述第一体素大小大于所述第二体素大小，其中所述第一体积大于所述第二体积，并且其中所述第二体积被包含 在第一卷内。

公开(公告)号：US20140018664A1

公开(公告)日：2014-01-16

申请号：US14007990

申请日：2012-04-04

申请人： Steffen Weiss ,  Ronaldus Frederik Johannes Holthuizen ,  Sascha Krueger ,  Peter Koken ,  Daniel Wirtz ,  Thomas Erik Amthor ,  Alk Uhlemann

发明人： Steffen Weiss ,  Ronaldus Frederik Johannes Holthuizen ,  Sascha Krueger ,  Peter Koken ,  Daniel Wirtz ,  Thomas Erik Amthor ,  Alk Uhlemann

IPC分类号： A61B5/055 ,  A61B5/00 ,  A61B5/06

CPC分类号： A61B5/055 ,  A61B5/064 ,  A61B5/6832 ,  A61B5/72 ,  G01R33/287 ,  G01R33/34084

摘要： A medical apparatus (1100) comprising a magnetic resonance imaging system and an interventional device (300) comprising a shaft (302, 1014, 1120). The medical apparatus further comprises a toroidal magnetic resonance fiducial marker (306, 600, 800, 900, 1000, 1122) attached to the shaft. The shaft passes through a center point (610, 810, 908, 1006) of the fiducial marker. The medical apparatus further comprises machine executable instructions (1150, 1152, 1154, 1156, 1158) for execution by a processor. The instructions cause the processor to acquire (100, 200) magnetic resonance data, to reconstruct (102, 202) a magnetic resonance image (1142), and to receive (104, 204) the selection of a target volume (1118, 1144, 1168). The instructions further cause the processor to repeatedly: acquire (106, 206) magnetic resonance location data (1146) from the fiducial marker and render (108, 212) a view (1148, 1162) indicating the position of the shaft relative to the target zone.

摘要翻译： 一种包括磁共振成像系统和包括轴（302,1014,1120）的介入装置（300）的医疗装置（1100）。 医疗装置还包括连接到轴的环形磁共振基准标记（306,600,800,900,1000,1122）。 轴通过基准标记的中心点（610,810,908,1006）。 医疗设备还包括用于由处理器执行的机器可执行指令（1150,1152,1154,1156,1158）。 所述指令使得所述处理器获取（100,200）磁共振数据，以重建（102,202）磁共振图像（1142），并且接收（104,204）所述目标体积（1118,1144， 1168）。 所述指令还使所述处理器重复地：从所述基准标记获取（106,206）磁共振位置数据（1146），并且渲染（108,212）指示所述轴相对于所述目标的位置的视图（1148,1162） 区。

公开(公告)号：US20100189328A1

公开(公告)日：2010-07-29

申请号：US12601530

申请日：2008-05-26

申请人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Daniel Bystrov

发明人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Daniel Bystrov

IPC分类号： G06K9/00

CPC分类号： G01R33/56375

摘要： The invention relates to a method of automatically acquiring magnetic resonance (MR) image data (500; 504) of an object located on a support (140), the support (140) being adapted to be moved to an image acquisition region of an MRI apparatus, the method comprising: specifying an area of interest (510) to be detected by the MRI apparatus, automatically moving of the support (140) in the direction towards the image acquisition region, automatically acquiring of first MR image data (500; 504) with a first resolution for identification of the area of interest (510) in the acquired image data (500; 504), automatically acquiring of second MR image data of the identified area of interest (510) with a second resolution, wherein the first resolution is lower than the second resolution.

摘要翻译： 本发明涉及一种自动获取位于支撑件（140）上的物体的磁共振（MR）图像数据（500; 504）的方法，所述支撑件（140）适于移动到MRI的图像采集区域 装置，所述方法包括：指定由MRI装置检测的感兴趣区域（510），沿着朝向图像获取区域的方向自动移动支撑件（140），自动获取第一MR图像数据（500; 504 ）具有用于识别所获取的图像数据（500; 504）中的感兴趣区域（510）的第一分辨率，以第二分辨率自动获取所识别的感兴趣区域（510）的第二MR图像数据，其中第一 分辨率低于第二分辨率。

公开(公告)号：US06466015B2

公开(公告)日：2002-10-15

申请号：US09982263

申请日：2001-10-17

申请人： Tobias Schaeffter ,  Peter Koken

发明人： Tobias Schaeffter ,  Peter Koken

IPC分类号： G01V300

CPC分类号： G01R33/56554 ,  G01R33/56518

摘要： The invention relates to an MR imaging method, notably for real-time imaging, in which the phase errors that occur in the MR signals because of inter alia eddy currents, are continuously monitored on the basis of the MR data sets acquired for imaging. To this end, MR signals that are successively acquired with different read-out gradients are related to one another in order to detect changes in the eddy current behavior on the basis of the phase differences. If necessary, calibration measurements are initiated so as to determine phase correction profiles whereby the phase errors of the MR data sets are compensated. For the imaging in accordance with the invention use can be made of Echo Planar Imaging (EPI) sequences for which individual, successively acquired echo signals are related to one another in order to monitor the phase errors. These echo signals are measured with the same phase encoding and with each time opposed read-out gradients for this purpose.

公开(公告)号：US08131040B2

公开(公告)日：2012-03-06

申请号：US12377915

申请日：2007-07-24

申请人： Thomas Koehler ,  Peter Koken

发明人： Thomas Koehler ,  Peter Koken

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/541

摘要： A diagnostic imaging system (8) images a subject at a preselected phase point (46) which occurs in one or more successive pulmonary cycles. A breathing monitor (44) monitors a cyclic physiological parameter in the pulmonary cycle and generates a cyclic pulmonary phase indicative signal. A CT scanner (12) is disposed adjacent an examination region (28) to generate transmission radiation data. A data processor (60) reconstructs an attenuation map (96) from the transmission data by weighting the transmission radiation data such that each of the pulmonary phases contributes substantially equally to the attenuation map.

摘要翻译： 诊断成像系统（8）在一个或多个连续肺循环中发生的预选相位点（46）对受试者进行成像。 呼吸监测器（44）监测肺循环中的循环生理参数并产生循环肺动脉指示信号。 CT扫描器（12）邻近检查区域（28）设置以产生透射辐射数据。 数据处理器（60）通过对发射辐射数据进行加权来重建来自发射数据的衰减图（96），使得每个肺相位基本上等于衰减图。

公开(公告)号：US20100239134A1

公开(公告)日：2010-09-23

申请号：US12377915

申请日：2007-07-24

申请人： Thomas Koehler ,  Peter Koken

发明人： Thomas Koehler ,  Peter Koken

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/541

摘要： A diagnostic imaging system (8) images a subject at a preselected phase point (46) which occurs in one or more successive pulmonary cycles. A breathing monitor (44) monitors a cyclic physiological parameter in the pulmonary cycle and generates a cyclic pulmonary phase indicative signal. A CT scanner (12) is disposed adjacent an examination region (28) to generate transmission radiation data. A data processor (60) reconstructs an attenuation map (96) from the transmission data by weighting the transmission radiation data such that each of the pulmonary phases contributes substantially equally to the attenuation map.

摘要翻译： 诊断成像系统（8）在一个或多个连续肺循环中发生的预选相位点（46）对受试者进行成像。 呼吸监测器（44）监测肺循环中的循环生理参数并产生循环肺动脉指示信号。 CT扫描器（12）邻近检查区域（28）设置以产生透射辐射数据。 数据处理器（60）通过对发射辐射数据进行加权来重建来自发射数据的衰减图（96），使得每个肺相位基本上等于衰减图。

公开(公告)号：US20090268863A1

公开(公告)日：2009-10-29

申请号：US11913821

申请日：2006-05-03

申请人： Thomas Koehler ,  Claas Bontus ,  Peter Koken

发明人： Thomas Koehler ,  Claas Bontus ,  Peter Koken

IPC分类号： H05G1/60 ,  G06K9/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421

摘要： The invention relates to a method and a system for the reconstruction of an object function (f(x)) based on projections acquired during the motion of a radiation source on a helical trajectory (17). The method is particularly suited for an n-PI+ acquisition which by definition completely comprises an n-PI and additionally some overscan data from the (n+2)−PI window. According to the method, two sets (Σ≧m, Σ≧m) of filtered projections are generated from the measuring values and separately back-projected to yield two absorption functions. The first absorption function (flf(x)) is based on contributions of Radon-planes with at most m intersections with the source trajectory (17), while the second absorption function (fhf(x)) is based on Radon-planes with more than m intersections with the source trajectory (17). The two absorption functions are added to yield the final absorption function (f(x)) of an object in the examination zone. In an approximative version of the method, the sets (Σ≧m, Σ≧m) of filtered projections are first added and then back-projected.

摘要翻译： 本发明涉及一种用于基于在螺旋轨迹（17）上的辐射源的运动期间获取的投影来重建对象函数（f（x））的方法和系统。 该方法特别适用于n-PI +采集，其通过定义完全包括n-PI，并且另外还包括来自（n + 2）-PI窗口的一些过扫描数据。 根据该方法，从测量值产生经滤波的投影的两组（Sigma> = m，Sigma> = m），并单独反投影以产生两个吸收函数。 第一吸收函数（flf（x））基于与源轨迹（17）最多m个交点的氡面的贡献，而第二吸收函数（fhf（x））基于具有更多的氡面 而不是与源轨迹（17）的交点。 添加两个吸收函数以产生检查区中物体的最终吸收函数（f（x））。 在该方法的近似版本中，首先添加滤波投影的集合（Sigma> = m，Sigma> = m），然后反投影。