公开(公告)号：EP2951603A1

公开(公告)日：2015-12-09

申请号：EP14702932.6

申请日：2014-01-31

申请人： UCL Business Plc.

发明人： OURSELIN, Sebastien ,  DAGA, Pankaj

IPC分类号： G01R33/44 ,  G01R33/56 ,  G01R33/565

CPC分类号： G01R33/565 ,  G01R33/24 ,  G01R33/5608 ,  G01R33/5616 ,  G01R33/56536 ,  G01R33/56545 ,  G06K9/00771 ,  G06T5/002 ,  G06T7/0014 ,  G06T7/30 ,  G06T2207/10088

摘要： An apparatus and method are provided for performing phase unwrapping for an acquired magnetic resonance (MR) image. The method includes modelling the MR phase in the MR image using a Markov random field (MRF) in which the true phase φ(t) and the wrapped phase φ(w) are modelled as random variables such that at voxel i of said MR image φ(t)(i)=φ(w)(i)+2πn(i), where n(i) is an unknown integer that needs to be estimated for each voxel i. The method further includes constructing a graph consisting of a set of vertices V and edges E and two special terminal vertices representing a source s and sink t, where there is a one-to-one correspondence between cuts on the graph and configurations of the MRF, a cut representing a partition of the vertices V into disjoint sets S and T such that sεS and tεT. The method further includes finding the minimum energy configuration, E(n(i)|φ(w)) of the MRF on the basis that the total cost of a given cut represents the energy of the corresponding MRF configuration, where the cost of a cut is the sum of all edges going from S to T across the cut boundary. The method further includes using the values of n(i) in the minimum energy configuration to perform the phase unwrapping from φ(w) to φ(t) for the MR image. A confidence may be computed for each voxel using dynamic graph cuts. The unwrapped phase from two MR images acquired at different times may be used to estimate a field map from the phase difference between the two MR images. The field map may be converted into a deformation field which is then used to initialize a non-rigid image registration of the acquired MR image against a reference image. The deformation field of the non-rigid registration is controlled to be smoother where the confidence is high.

摘要翻译： 提供了一种用于对获取的磁共振（MR）图像执行相位展开的装置和方法。 该方法包括使用马尔科夫随机场（MRF）对MR图像中的MR相进行建模，其中将真实相位（t）和包裹相位（w）建模为随机变量，使得在所述 （i）=＆phgr;（w）（i）+ 2＆pgr; n（i），其中n（i）是需要为每个体素i估计的未知整数。 该方法还包括构造一组由顶点V和边缘E组成的图形，以及表示源和汇点t的两个特殊终端顶点，其中在图形上的切割和MRF的配置之间存在一一对应关系 ，表示顶点V的分割成不相交集S和T，使得s和t和t。 该方法还包括基于给定切割的总成本表示对应的MRF配置的能量来找到MRF的最小能量配置E（n（i）|＆phgr（（w）），其中成本 切割是在切割边界从S到T的所有边的总和。 该方法还包括使用最小能量配置中的n（i）的值对于MR图像执行从（w）到＆phgr（t）的相位展开。 可以使用动态图形切割来计算每个体素的置信度。 来自在不同时间获取的两个MR图像的展开相位可以用于从两个MR图像之间的相位差来估计场图。 场地图可以被转换成变形场，然后使用该变形场来初始化所获取的MR图像对参考图像的非刚性图像配准。 将非刚性配准的变形场控制为在置信度高的情况下更平滑。

公开(公告)号：EP2947473A1

公开(公告)日：2015-11-25

申请号：EP15164841.7

申请日：2015-04-23

申请人： Siemens Aktiengesellschaft

发明人： Nittka, Mathias

IPC分类号： G01R33/28 ,  G01R33/36

CPC分类号： G01R33/5618 ,  G01R33/288 ,  G01R33/34046 ,  G01R33/34092 ,  G01R33/3664 ,  G01R33/385 ,  G01R33/5608

摘要： Die Erfindung betrifft ein Verfahren zur Erstellung eines MR-Bildes eines Untersuchungsobjekts mit einer MR-Bildgebungssequenz in einer MR-Anlage, mit folgenden Schritten:
- Einstrahlen von mindestens einem HF-Puls (3, 4) durch eine Ganzkörperspule (21) der MR-Anlage während der Bildgebungssequenz,
- Einstrahlen von mindestens einem HF-Puls (5) durch eine lokale Sendespule (22) der MR-Anlage während der Bildgebungssequenz
- Auslesen von MR-Signalen, die durch die eingestrahlten HF-Pulse (3, 4, 5) erzeugt werden.
- Erstellen des MR-Bildes aus den ausgelesenen MR-Signalen.

摘要翻译： 本发明涉及一种方法，用于产生检查对象与在MR系统中的MR成像序列的MR图像，包括以下步骤： - 至少一个RF脉冲照射的（3，4）通过全身的MR的线圈（21） 成像序列期间系统， - 照射至少一个RF脉冲（5）通过所述成像序列期间MR系统的本地传输线圈（22） - MR信号的读取（通过辐射RF脉冲3，4，5 ）被生成。 - 创建从MR MR图像读取信号。

公开(公告)号：EP2932470A2

公开(公告)日：2015-10-21

申请号：EP14784213.2

申请日：2014-10-14

申请人： Koninklijke Philips N.V.

发明人： KABUS, Sven ,  RUPPERTSHOFEN, Heike ,  SCHMITT, Holger

IPC分类号： G06T7/00

CPC分类号： G06T7/0024 ,  A61B5/055 ,  A61B6/032 ,  A61B6/037 ,  A61B6/469 ,  A61B6/5247 ,  A61B8/00 ,  G01R33/4812 ,  G01R33/5608 ,  G06T3/0068 ,  G06T7/0012 ,  G06T7/11 ,  G06T7/30 ,  G06T2207/20012 ,  G06T2207/20092 ,  G06T2207/20104 ,  G06T2207/30004

摘要： The invention relates to a method and an image processing device (50) for the registration of two images(I
1 , I
2 ) that may for example be provided by a CT scanner (10) and/or an MRI scanner (20). According to one embodiment of the invention, the images are first globally registered (GR) with a given registration algorithm using a first parameter vector (
p 0 ). A user may then select a region of interest ROI, and a plurality of local registrations (LR1,... LRs,... LRn) are calculated for this ROI using the same registration algorithm but different parameter vectors(
p 1 ,
p 2 , …
p n ). The results of the local registrations (LR1,... LRs,... LRn) are displayed and the user can select the best local registration(s). In a final step, the selected local registration(s) (LRs) and the global registration (GR) may be merged. Additionally or alternatively, a parameter vector for a local registration in the ROI may be determined by an automatic analysis of the ROI.

摘要翻译： 本发明涉及一种用于登记可由例如CT扫描器（10）和/或MRI扫描器（20）提供的两个图像（I1，I2）的方法和图像处理装置（50）。 根据本发明的一个实施例，使用第一参数向量（p），使用给定的注册算法首先对图像进行全局注册（GR）。 然后，用户可以选择感兴趣的区域ROI，并且使用相同的注册算法但是不同的参数向量（p，p，...）为该ROI计算多个本地注册（LR1，...，LR，...，LRn） ... p）。 显示本地注册的结果（LR1，... LRs，...，LRn），用户可以选择最佳本地注册。 在最后一步中，可以合并所选择的本地注册（LR）和全局注册（GR）。 附加地或替代地，可以通过ROI的自动分析来确定ROI中的局部注册的参数向量。

公开(公告)号：EP2915478A1

公开(公告)日：2015-09-09

申请号：EP14157778.3

申请日：2014-03-05

申请人： Siemens Aktiengesellschaft

发明人： Feiweier, Thorsten ,  Kober, Tobias ,  Krüger, Gunnar

IPC分类号： A61B5/00 ,  A61B5/11 ,  G01R33/567 ,  G01R33/565 ,  G01P13/00 ,  G01R33/563

CPC分类号： G01R33/5673 ,  A61B5/11 ,  A61B5/7207 ,  A61B5/721 ,  G01P21/00 ,  G01R33/307 ,  G01R33/5608 ,  G01R33/5616 ,  G01R33/56308 ,  G01R33/56509 ,  G01R33/5676

摘要： A computer implemented method and a medical imaging system for calibrating a motion detection system working according to a motion detection technique and configured for detecting a motion of an object during medical imaging by means of the medical imaging system, the computer-implemented method comprising an automatic calibration process for determining at least one motion threshold for said object motion detection system, said calibration process taking place for said object being in a position and place allowing its imaging by said medical imaging system, the calibration process comprising:
a. using the motion detection system working according to said motion detection technique for repeatedly acquiring motion detection data enabling object motion detection and using a motion quantification system working according to a motion quantification technique for repeatedly acquiring motion quantification data enabling object motion quantification;
b. analyzing the motion quantification data for determining if said object was mobile or immobile

摘要翻译： 一种计算机实现的方法和用于校准的运动检测系统的工作雅丁用于通过医学成像系统来检测医疗成像过程中的物体的运动的运动检测技术和配置的医疗成像系统，所述计算机实现的方法的自动包括 用于所述物体运动检测系统的确定性挖掘的至少一个运动阈值校准过程中，发生用于在位置和地点所述目的是允许由所述医学成像系统其成像所述校准过程中，校准过程包括：a。 使用运动检测系统的工作gemäß到所述运动检测技术的用于重复地获取运动检测数据，使物体检测和使用运动的运动定量系统工作gemäß到运动定量技术，用于获取运动反复量化数据，使对象运动量化; 湾 分析所述运动数据量化为确定性挖掘如果所述对象哪个移动或不动的

公开(公告)号：EP2901954A1

公开(公告)日：2015-08-05

申请号：EP15152096.2

申请日：2008-11-26

申请人： Covidien LP

发明人： Bonn, Kenlyn S.

IPC分类号： A61B18/18 ,  A61B18/12 ,  A61B5/055 ,  G01R33/54 ,  G01R33/56 ,  G01R33/48 ,  A61B18/00 ,  A61B19/00

CPC分类号： A61B18/1206 ,  A61B5/055 ,  A61B18/18 ,  A61B18/1815 ,  A61B2018/00577 ,  A61B2018/00636 ,  A61B2018/00738 ,  A61B2034/101 ,  A61B2090/374 ,  G01R33/4808 ,  G01R33/5608

摘要： A system for determining field of ablation is disclosed. The system includes a power source configured to generate electromagnetic energy and an energy applicator coupled to the power source. The energy applicator is configured to be inserted into tissue and to provide electromagnetic energy to a target volume. The system also includes an imaging apparatus configured to generate a uniform magnetic field and at least one variable magnetic field around the tissue. The imaging apparatus obtains an image of a field of ablation within the target volume in response to a trace RF pulse supplied by the power source through the energy applicator to the target volume simultaneously with an excitation RF pulse generated by the imaging apparatus and the at least one variable magnetic field.

摘要翻译： 公开了一种用于确定消融场的系统。 该系统包括配置成产生电磁能的电源和耦合到电源的能量施加器。 能量施加器被构造成插入组织中并且向目标体积提供电磁能量。 该系统还包括成像装置，该成像装置被配置成在组织周围产生均匀磁场和至少一个可变磁场。 成像装置响应于由电源通过能量施加器提供给目标体积的迹线RF脉冲，与由成像装置产生的激励RF脉冲同时获得目标体积内的消融场的图像，并且至少 一个可变磁场。

公开(公告)号：EP2875368A2

公开(公告)日：2015-05-27

申请号：EP13762253.6

申请日：2013-07-03

申请人： Koninklijke Philips N.V.

发明人： HAUTVAST, Guillaume Leopold Theodorus Frederik

IPC分类号： G01R33/56 ,  G01R33/563

CPC分类号： G06T7/20 ,  G01R33/546 ,  G01R33/5608 ,  G01R33/56308 ,  G06F19/00 ,  G06T7/0016 ,  G06T15/06 ,  G06T2200/24 ,  G06T2207/10072 ,  G06T2207/10081 ,  G06T2207/10136 ,  G06T2207/20101 ,  G06T2207/30048 ,  G06T2210/41 ,  G16H50/20 ,  G16H50/30 ,  G16H50/50

摘要： A system (10) for quantification of uncertainty of contours includes a display (48) which displays a portion of a 4D image of at least a left ventricle over a plurality of cardiac phases. A measurement device (16) includes at least one processor (42) programmed to receive the 4D image (18) from an imaging device (12), receive a selected location on the myocardial wall of the left ventricle, cast a ray perpendicular to at least one of the myocardial wall or center of the left ventricle through the selected location, calculate a thickness the myocardial wall along the cast ray, evaluate myocardial wall motion over the range of the cardiac phases, calculate a quantification of the myocardial contractile function, and display the calculate a quantification of the myocardial contractile function on the display device (48).

摘要翻译： 用于量化轮廓不确定度的系统（10）包括显示器（48），其显示多个心脏相位上的至少左心室的4D图像的一部分。 测量装置（16）包括被编程为从成像装置（12）接收4D图像（18）的至少一个处理器（42），在左心室的心肌壁上接收所选择的位置，将射线垂直于 通过所选位置的心肌壁或左心室中心的至少一个，计算沿着铸造射线的心肌壁的厚度，评估心脏相位范围上的心肌壁运动，计算心肌收缩功能的量化，以及 显示计算显示设备上心肌收缩功能的量化（48）。

公开(公告)号：EP2787883A4

公开(公告)日：2015-05-06

申请号：EP12856038

申请日：2012-12-10

申请人： RESONANCE HEALTH ANALYSIS SERVICES PTY LTD

发明人： ST PIERRE TIMOTHY GUY ,  BANGMA SANDER JONATHAN ,  HOUSE MICHAEL J

IPC分类号： A61B5/055 ,  G01R33/48 ,  G06K9/00

CPC分类号： A61B5/4872 ,  A61B5/055 ,  A61B5/4244 ,  G01R33/4828 ,  G01R33/5608 ,  G01R33/565

公开(公告)号：EP2847605A1

公开(公告)日：2015-03-18

申请号：EP13786941.8

申请日：2013-05-09

申请人： Laboratoires Bodycad Inc.

发明人： RIVET-SABOURIN, Geoffroy

IPC分类号： G01R33/54 ,  G06T7/00

CPC分类号： G06T7/77 ,  G01R33/5608 ,  G06T7/12 ,  G06T7/136 ,  G06T7/149 ,  G06T7/155 ,  G06T17/20 ,  G06T19/20 ,  G06T2207/10028 ,  G06T2207/10088 ,  G06T2207/20116 ,  G06T2207/30008

摘要： There is described herein an image segmentation technique using an iterative process. A contour, which begins with a single point that expands into a hollow shape, is iteratively deformed into a defined structure. As the contour is deformed, various constraints are applied to points along the contour to dictate its rate of change and direction of change are modified dynamically. The constraints may be modified after one or more iterations, at each point along the contour, in accordance with newly measured or determined data.

摘要翻译： 这里描述了使用迭代过程的图像分割技术。 从扩展成中空形状的单个点开始的轮廓被迭代地变形为限定的结构。 当轮廓变形时，沿着轮廓的点应用各种约束，以决定其变化速率和动态方向的动态变化。 根据新测量或确定的数据，可以在沿着轮廓的每个点的一个或多个迭代之后修改约束。

公开(公告)号：EP2791907A1

公开(公告)日：2014-10-22

申请号：EP12824690.7

申请日：2012-12-11

申请人： Université de Lorraine ,  Centre Hospitalier Regional de Nancy

发明人： MENINI, Anne ,  FELBLINGER, Jacques ,  ODILLE, Freddy ,  VUISSOZ, Pierre-André

IPC分类号： G06T11/00 ,  G01R33/56

CPC分类号： G01R33/56509 ,  G01R33/5608 ,  G06T7/20 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/10088 ,  G06T2207/10104 ,  G06T2207/10108 ,  G06T2211/424

摘要： The present invention relates to a method of reconstructing imaging signals (6) in a biological medium on the basis of experimental measurements (1) perturbed by movements, implementing measurements representative of said movements (2), at least one model of movement comprising movement parameters (13, 14), and an imaging sampling grid (21), which method furthermore comprises steps of (i) constructing a movement sampling grid by selecting a restricted set of points on the basis of the imaging sampling grid, and (ii) calculation of movement parameters (12) by inverting a linear system (10) at the points of said movement sampling grid. The invention also relates to devices implementing the method.

公开(公告)号：EP2689261A1

公开(公告)日：2014-01-29

申请号：EP12708953.0

申请日：2012-02-28

申请人： Koninklijke Philips N.V. ,  Philips Intellectual Property & Standards GmbH

发明人： DONEVA, Mariya Ivanova ,  REMMELE, Stefanie ,  BÖRNERT, Peter ,  MAZURKEWITZ, Peter ,  SENEGAS, Julien ,  KEUPP, Jochen ,  NEHRKE, Kay

IPC分类号： G01R33/56 ,  G01R33/561 ,  G01R33/567 ,  G01R33/48

CPC分类号： G01R33/56 ,  G01R33/4824 ,  G01R33/5608 ,  G01R33/5611 ,  G01R33/56509

摘要： The invention relates to a method of MR imaging of at least a portion of a body (10) of a patient placed in an examination volume of a MR device (1), the method comprising the steps of: - subjecting the portion of the body (10) to a first imaging sequence for acquiring a first signal data set (21); - subjecting the portion of the body (10) to a second imaging sequence for acquiring a second signal data set (23), wherein the imaging parameters of the second imaging sequence differ from the imaging parameters of the first imaging sequence; - reconstructing a MR image from the second signal data set (23) by means of regularization using the first signal data set (21) as prior information. Moreover, the invention relates to a MR device (1) and to a computer program for a MR device (1).