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1. 发明申请

WO2022198034A1 RF PULSE GENERATION FOR MULTI-BAND MAGNETIC RESONANCE IMAGING 审中-公开
公开(公告)号：WO2022198034A1
公开(公告)日：2022-09-22
申请号：PCT/US2022/020928
申请日：2022-03-18
申请人： RESONANCE RESEARCH, INC.
发明人： HETHERINGTON, Hoby P.
IPC分类号： G01R33/58 , G01R33/48 , G01R33/483 , G01R33/36 , A61B5/055
摘要： A system and method of generating Radio Frequency (RF) pulses RF(t) in a Multi-band (MB) Magnetic Resonance Imaging (MRI) system is presented. The method includes determining a dirac comb function, the period of the comb function determining the frequency separation of the excitation bands. The method further includes determining a single band frequency selective pulse, defining the envelope of a pulse of RF(t), and the shape of individual excitation frequency bands in the frequency domain. The method further includes determining the shape of RF(t) during each period, and is used to modulate uniformity and/or number of individual excitation bands in the frequency domain. RF(t) pulses are generated in the MRI system simultaneously with an MRI gradient so as to simultaneously excite multiple slices within a subject, wherein the RF(t) pulse create a spin response.

2. 发明申请

WO2022184526A1 EQUALIZATION FOR MAGNETIC RESONANCE IMAGING (MRI) SIGNALS 审中-公开
公开(公告)号：WO2022184526A1
公开(公告)日：2022-09-09
申请号：PCT/EP2022/054558
申请日：2022-02-23
申请人： KONINKLIJKE PHILIPS N.V.
发明人： RODRIGO CALDERON, Rico , KEEL, Alton , WYNN, Tracy, Allyn , REYKOWSKI, Arne , KING, Scott, Bradley
IPC分类号： G01R33/36 , G01R33/58
摘要： A magnetic resonance (MR) system includes an MR receive channel (20) including: an MR coil element (22) configured to receive MR signals in an MR frequency band; an electronic signal processing chain (24) configured to process the MR signals received by the MR coil element to produce processed MR signals, wherein the electronic signal processing chain includes an equalization filter (26); and a signal injector (8, 16, 28, 38, 38D) configured to input a reference radio frequency (RF) signal in the MR frequency band to the signal processing chain, wherein the signal processing chain processes the reference RF signal to generate a processed reference RF signal. Equalizer electronics (30) are configured to adjust the equalization filter based at least on the processed reference RF signal such that the MR receive channel has a flat frequency response over the MR frequency band.

3. 发明申请

WO2020046120A1 MAGNETIC RESONANCE IMAGING BASED ON TRANSIENT RESPONSE SIGNALS 审中-公开
公开(公告)号：WO2020046120A1
公开(公告)日：2020-03-05
申请号：PCT/NL2019/050551
申请日：2019-08-28
申请人： ERASMUS UNIVERSITY MEDICAL CENTER ROTTERDAM
发明人： KOTEK, Gyula , HERNÁNDEZ TAMAMES, Juan Antonio
IPC分类号： G01R33/50 , G01R33/56 , G01R33/44 , G01R33/58
摘要： A method for magnetic resonance imaging (MRI) comprises applying a consecutive series of MRI sequences to a target volume (V) according to experimental settings (TR, α, β). A discrete sequence of transient response signals (Sn, Sn+1,Sn+2) is measured and fitted to a fit function (F) that is continuously dependent on a sequence number (n) of the respective MRI sequence (Pn) and corresponding response signal (Sn). A shape of the fit function is determined according to an analytically modelled evolution by the experimental parameters (TR, α, β) as well as variable intrinsic parameters (r,λ3,φ,δ) to be fitted. For example, the model is based on an equivalent harmonic oscillator. The intrinsic parameters of the fit function can be related to the intrinsic properties (PD,T1,T2) of the spin systems and used for imaging the target volume (V). Various optimizations of contrast can be achieved by tuning the experimental settings according to the model.

4. 发明申请

WO2019070848A1 SYSTEMS AND METHODS FOR ESTIMATING COMPLEX RADIOFREQUENCY FIELDS IN A MAGNETIC RESONANCE IMAGING 审中-公开
公开(公告)号：WO2019070848A1
公开(公告)日：2019-04-11
申请号：PCT/US2018/054154
申请日：2018-10-03
申请人： UNIVERSITY OF CINCINNATI
发明人： WANG, Jinghua
IPC分类号： G01R33/24 , A61B5/055 , G01R33/561 , G01R33/563 , G01R33/565 , G01R33/58
CPC分类号： G01R33/246 , A61B5/0042 , A61B5/055 , A61B2560/0223 , G01R33/5611 , G01R33/5659 , G01R33/583
摘要： A method and apparatus for determining spatial distribution of a complex radio frequency (RF) of both transmit field and receive sensitivity a magnetic resonance imaging (MRI) system. The method includes estimation of the absolute phase of transmit field using a reference transmit coil or array coils with minimal absolute phase. The method and apparatus include estimation of complex receive sensitivity of a transceiver coil using the complex transmit field of the transceiver coil or array coils.

5. 发明申请

WO2019053047A1 PARALLEL IMAGING WITH ARCHIVED COIL SENSITIVITY MAPS 审中-公开
公开(公告)号：WO2019053047A1
公开(公告)日：2019-03-21
申请号：PCT/EP2018/074569
申请日：2018-09-12
申请人： KONINKLIJKE PHILIPS N.V.
发明人： VAN DEN BRINK, Johan, Samuel
IPC分类号： G01R33/561 , G01R33/58
摘要： The invention provides for a magnetic resonance imaging system (100, 300, 500) comprising a radio-frequency system (114, 116) comprising multiple coil elements (114) for acquiring imaging magnetic resonance data (166) from a subject (118). The magnetic resonance imaging system further comprises a memory (150) for storing machine executable instructions (160). The memory further stores imaging pulse sequence commands (164). The imaging pulse sequence commands are configured for controlling the magnetic resonance imaging system to acquire the imaging magnetic resonance data according to a chosen parallel magnetic resonance imaging protocol. The magnetic resonance imaging system further comprises a processor (144) for controlling the magnetic resonance imaging system. Execution of the machine executable instructions causes the processor to: control (200) the magnetic resonance imaging system to acquire the imaging magnetic resonance data using the pulse sequence commands; and reconstruct (202) an imaging magnetic resonance image (168) from the imaging magnetic resonance data according to the chosen parallel magnetic resonance imaging protocol. The imaging magnetic resonance image is reconstructed by maximizing consistency between the imaging magnetic resonance data, the imaging magnetic resonance image, and an imaging coil sensitivity map (162). After reconstructing the imaging magnetic resonance image, the processor stores (202) the imaging coil sensitivity map in the memory.

6. 发明申请

WO2016184830A1 TEMPERATURE COMPENSATED NMR MAGNETIC FIELD PROBES 审中-公开
标题翻译：温度补偿NMR磁场探针
公开(公告)号：WO2016184830A1
公开(公告)日：2016-11-24
申请号：PCT/EP2016/060949
申请日：2016-05-16
申请人： EIDGENÖSSISCHE TECHNISCHE HOCHSCHULE (ETH) , UNIVERSITÄT ZÜRICH
发明人： GROSS, Simon , BARMET, Christoph
IPC分类号： G01R33/24 , G01R33/58 , G01R33/565
CPC分类号： G01R33/24 , G01R33/56563 , G01R33/58
摘要： A magnetic field probe, particularly for magnetic resonance applications, comprises: - a detector liquid that exhibits a nuclear magnetic resonance (NMR) line character- ized by a chemical shift δ; - an electrically conductive structure surrounding the detector liquid for receiving therefrom a magnetic resonance signal; and - a container containing the detector liquid; - the detector liquid containing paramagnetic dopant means dissolved therein; - said NMR transition having an observable resonance frequency ω when the field probe is placed in an external magnetic field; and has orientation means for orienting the field probe in relation to a reference direction of said external magnetic field. The concentration c D of said paramagnetic dopant means is selected in such manner that, when the field probe is placed into an external magnetic field B 0 and oriented in a predefined manner with respect to said external magnetic field at a given temperature T 0 , a temperature dependence ω'(T 0 ) of said resonance frequency is substantially zero.
摘要翻译：特别是用于磁共振应用的磁场探测器包括： - 具有由化学位移δ表征的核磁共振（NMR）线的探测器液体; - 围绕检测器液体的导电结构，用于从其接收磁共振信号; 和 - 容纳检测器液体的容器; - 含有顺磁性掺杂剂溶液的检测液体溶解于其中; - 当场探头置于外部磁场中时，所述NMR转变具有可观察到的共振频率ω; 并且具有用于相对于所述外部磁场的参考方向定向场探头的定向装置。选择所述顺磁性掺杂剂装置的浓度c D，使得当场探针被放置在外部磁场B 0中并且在给定温度T 0时相对于所述外部磁场以预定义的方式取向时，a 所述谐振频率的温度依赖性ω'（T 0）基本为零。

7. 发明申请

WO2016126795A1 DETECTING NERVE DAMAGE USING DIFFUSION TENSOR IMAGING 审中-公开
标题翻译：使用扩张传感器成像检测神经损伤
公开(公告)号：WO2016126795A1
公开(公告)日：2016-08-11
申请号：PCT/US2016/016331
申请日：2016-02-03
申请人： CHILDREN'S MEDICAL CENTER CORPORATION
发明人： BORSOOK, David , BORRA, Ronald , SERRANO, Paul , BECERRA, Lino
IPC分类号： A61B5/00 , A61B5/055 , G01R33/563 , G01R33/58
CPC分类号： G01R33/56341 , A61B5/055 , A61B5/4041 , A61B5/7282 , A61B5/742 , A61B2576/02
摘要： A method includes: identifying, by a processing circuit, diffusion tensor imaging (DTI) data of a peripheral nerve in a subject that is associated with an area of pain experienced by the subject; determining, by the processing circuit, one or more DTI-derived measurements from the DTI data for each of one or more nerve branches of the peripheral nerve; and detecting, by the processing circuit, potential nerve damage in a particular nerve branch of the one or more nerve branches based on the one or more DTI-derived measurements associated with the particular nerve branch.
摘要翻译：一种方法包括：通过处理电路识别与受试者经历的疼痛区域相关联的受试者中的周围神经的扩散张量成像（DTI）数据; 由所述处理电路确定来自所述DTI数据的来自所述周围神经的一个或多个神经分支中的每一个的一个或多个DTI衍生测量值; 以及基于与特定神经分支相关联的一个或多个DTI衍生的测量，通过处理电路检测所述一个或多个神经分支的特定神经分支中的神经损伤。

8. 发明申请

WO2016074059A1 METHOD, SYSTEM AND APPARATUS FOR IMAGE CAPTURE AND REGISTRATION IN IMAGE-GUIDED SURGERY 审中-公开
标题翻译：图像捕获和图像引导手术注册的方法，系统和设备
公开(公告)号：WO2016074059A1
公开(公告)日：2016-05-19
申请号：PCT/CA2014/000819
申请日：2014-11-14
申请人： SYNAPTIVE MEDICAL (BARBADOS) INC. , STAINSBY, Jeff , SELA, Gal
发明人： STAINSBY, Jeff , SELA, Gal
IPC分类号： G01R33/58 , A61B19/00 , A61B5/055
CPC分类号： A61B5/1127 , A61B5/055 , A61B34/20 , A61B2034/2055 , A61B2034/2065 , A61B2090/374 , G01R33/28 , G01R33/543 , G01R33/5608 , G01R33/58 , G06T7/0012 , G06T2207/10088
摘要： A method, system and apparatus for image capture and registration are described. The method includes: obtaining a position of an imaging device in a tracking system frame of reference; obtaining a position of a patient in the tracking system frame of reference; determining, based on the position of the imaging device and the position of the patient, a transformation for registering an imaging device frame of reference with a patient frame of reference; receiving an instruction to capture an image, the instruction including coordinates identifying a target area in the patient frame of reference; applying the transformation to convert the coordinates to the imaging device frame of reference; and controlling the imaging device to capture an image based on the converted coordinates.
摘要翻译：描述了用于图像捕获和配准的方法，系统和装置。该方法包括：在跟踪系统参考系中获得成像装置的位置; 在跟踪系统参考系中获得患者的位置; 基于所述成像装置的位置和所述患者的位置来确定用于登记具有患者参照系的成像装置参考系的变换; 接收捕获图像的指令，所述指令包括标识所述患者参照系中的目标区域的坐标; 应用变换将坐标转换成成像装置参考系; 以及控制所述成像装置以基于所转换的坐标捕获图像。

9. 发明申请

WO2015161386A1 SYSTEMS AND METHODS FOR FIELD MAPPING IN MAGNETIC RESONANCE IMAGING 审中-公开
标题翻译：磁共振成像中场地映射的系统与方法
公开(公告)号：WO2015161386A1
公开(公告)日：2015-10-29
申请号：PCT/CA2015/050344
申请日：2015-04-24
申请人： LIU, Junmin , DRANGOVA, Maria
发明人： LIU, Junmin , DRANGOVA, Maria
IPC分类号： G01R33/58
CPC分类号： G01R33/443 , A61B5/055 , A61B5/4872 , G01R33/243 , G01R33/4828 , G01R33/50 , G01R33/56563
摘要： Various embodiments of the present disclosure present unwrapping– based B0 mapping systems and methods. An initial B0 map is obtained by unwrapping a pseudo-in-phase complex data that is generated from selected echoes of multi-echo gradient echo image data. Global and local phase errors that are present in the initial B0 map are corrected to produce a phase-error- corrected B0 map. A bias frequency shift is employed to produce a corrected fat-fraction map based on the phase-error-corrected B0 map. The corrected fat-fraction map is employed to generate a final B0 map.
摘要翻译：本公开的各种实施例提供了基于解缠绕的B0映射系统和方法。通过展开从多回波梯度回波图像数据的选定回波产生的伪同相复数数据来获得初始B0图。在初始B0映射中存在的全局和局部相位误差被校正以产生相位误差校正的B0映射。采用偏移频率偏移来基于相位误差校正的B0图产生校正的脂肪分数图。采用校正的脂肪分数图生成最终的B0图。

10. 发明申请

WO2015092776A1 UNIVERSAL PHANTOM STRUCTURE FOR QUALITY INSPECTIONS BOTH ON COMPUTERIZED TOMOGRAPHY AND ON MAGNETIC RESONANCE TOMOGRAPHY 审中-公开
标题翻译：通用计算机图像和磁共振成像质量检查的结构
公开(公告)号：WO2015092776A1
公开(公告)日：2015-06-25
申请号：PCT/IB2014/067215
申请日：2014-12-22
申请人： I.R.C.C.S. CENTRO NEUROLESI "BONINO-PULEJO"
发明人： VERMIGLIO, Giuseppe , ACRI, Giuseppe , TESTAGROSSA, Barbara , BRAMANTI, Placido , BRAMANTI, Alessia
IPC分类号： A61B6/00 , A61B6/03 , A61B5/055 , G01R33/58
CPC分类号： G01R33/58 , A61B5/055 , A61B6/032 , A61B6/583
摘要： The present invention relates to a phantom for periodical measurements of parameters allowing to ensure that performance of equipment for computed tomography and/or magnetic resonance tomography are compliant to established acceptability criteria, that is performance are constant in time. The main characteristic of such phantom is that the same phantom may be used for measurements of different physical parameters and for different machines, even of different type, such as machines for CT and/or MRT. The universal phantom described is made of a rectangular parallelepiped in PMMA made of different sections that may be filled with an appropriate liquid and/or contain different inserts according to the measurements to be performed, such as for example noise and uniformity, CT number linearity, high contrast spatial resolution, low contrast spatial resolution, layer thickness, etc.
摘要翻译：本发明涉及用于周期性测量参数的体模，其允许确保用于计算机断层摄影和/或磁共振断层摄影的设备的性能符合建立的可接受性标准，即性能在时间上是恒定的。这种幻影的主要特征是，相同的体模可以用于不同物理参数的测量，也可以用于不同类型的机器，例如用于CT和/或MRT的机器。所描述的通用体模由根据要执行的测量的不同部分制成的可能填充有适当液体和/或包含不同插入物的PMMA形成的长方体形成，例如噪声和均匀性，CT数线性，高对比度空间分辨率，低对比度空间分辨率，层厚度等

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