公开(公告)号：US20150035530A1

公开(公告)日：2015-02-05

申请号：US14449297

申请日：2014-08-01

申请人： Matthew Tisdall ,  Andre van der Kouwe

发明人： Matthew Tisdall ,  Andre van der Kouwe

IPC分类号： G01R33/567 ,  A61B5/00 ,  A61B5/0402 ,  G01R33/561 ,  A61B5/08

CPC分类号： A61B5/7285 ,  A61B5/055 ,  A61B5/0816 ,  A61B5/7203 ,  G01R33/5616 ,  G01R33/565 ,  G01R33/56509 ,  G01R33/56518 ,  G01R33/56563

摘要： Systems and methods for estimating frequency drifts in magnetic resonance signals acquired with a magnetic resonance imaging (“MRI”) system are provided. In one example, the frequency drifts are estimated from phase-correction data that are obtained during an echo-planar imaging (“EPI”), or other multiecho imaging, scan. The systems and methods of the present invention provide for efficiently and accurately computing frequency drift values that can be used for real-time, prospective frequency drift correction.

摘要翻译： 提供用于估计用磁共振成像（“MRI”）系统获取的磁共振信号中的频率漂移的系统和方法。 在一个示例中，通过在回波平面成像（“EPI”）或其他多重成像扫描期间获得的相位校正数据来估计频率漂移。 本发明的系统和方法提供了有效和准确地计算可用于实时，预期频率漂移校正的频率漂移值。

公开(公告)号：US20120197104A1

公开(公告)日：2012-08-02

申请号：US13322332

申请日：2010-10-24

申请人： Stefan Posse ,  Andre Van Der Kouwe ,  Kunxiu Gao ,  Weili Zheng

发明人： Stefan Posse ,  Andre Van Der Kouwe ,  Kunxiu Gao ,  Weili Zheng

IPC分类号： A61B5/055

CPC分类号： G01R33/4838 ,  G01R33/4833 ,  G01R33/4835 ,  G01R33/5607

摘要： A system and methods for imaging a patient organ. The system includes a MRI imaging apparatus communicating with a memory and processor. The method aligns the organ with a standardized organ, and includes a step of spatially normalizing the standardized organ to the patient organ. The method also provides optimized slices of the standardized organ and translates optimized slices of standardized organ into optimized slices of the patient organ. The method images the patient organ according to the optimized slices of the patient organ.

摘要翻译： 用于成像患者器官的系统和方法。 该系统包括与存储器和处理器通信的MRI成像设备。 该方法使器官与标准化器官对齐，并且包括将标准化器官空间归一化到患者器官的步骤。 该方法还提供了标准化器官的优化切片，并将优化的标准化器官切片转化为患者器官的优化切片。 该方法根据患者器官的优化切片对患者器官进行成像。

公开(公告)号：US07602179B2

公开(公告)日：2009-10-13

申请号：US11562879

申请日：2006-11-22

申请人： Andre van der Kouwe ,  Bruce Fischl

发明人： Andre van der Kouwe ,  Bruce Fischl

IPC分类号： G01V3/00

CPC分类号： G01R33/561 ,  G01R33/5616

摘要： A system and method for medical imaging includes an improvement to the MP-RAGE pulse sequence that enables the readout bandwidth thereof to be matched to that of other pulse sequences used in the same examination without a significant loss in SNR. More specifically, the present invention includes using a multi-echo MP-RAGE pulse sequence in which multiple gradient-recalled NMR signals are acquired at the desired “matching” bandwidth and combining selected ones of the NMR signals to reconstruct an image. By selecting and combining NMR signals acquired at each phase encoding, the SNR of the resulting reconstructed image can be maintained.

摘要翻译： 用于医学成像的系统和方法包括对MP-RAGE脉冲序列的改进，其使得其读出带宽与在相同检查中使用的其它脉冲序列的读出带宽匹配，而没有SNR的显着损失。 更具体地，本发明包括使用多回波MP-RAGE脉冲序列，其中以期望的“匹配”带宽获取多个梯度回缩的NMR信号，并组合所选择的NMR信号以重建图像。 通过选择和组合在每个相位编码处获取的NMR信号，可以保持所得到的重建图像的SNR。

公开(公告)号：US20070247150A1

公开(公告)日：2007-10-25

申请号：US11735578

申请日：2007-04-16

申请人： Andre van der Kouwe

发明人： Andre van der Kouwe

IPC分类号： G01V3/00

CPC分类号： G01R33/4806 ,  G01R33/5616 ,  G01R33/56509 ,  G01R33/5676

摘要： An fMRI study is conducted using a 2D EPI pulse sequence. A separate blood flow navigator pulse sequence is interleaved with the fMRI data acquisition to monitor blood flow in arteries that feed the brain tissue. Information in the blood flow navigator data is used to reduce errors in the fMRI data due to tissue motion caused by pulsatile blood flow. In one embodiment the blood flow navigator information is used to gate the fMRI acquisition and in another embodiment the information is used to retrospectively correct acquired fMRI data.

摘要翻译： 使用2D EPI脉冲序列进行fMRI研究。 单独的血流导航仪脉冲序列与fMRI数据采集交错以监测供给脑组织的动脉中的血流。 血流导航器数据中的信息用于减少由脉动血流引起的组织运动引起的fMRI数据中的误差。 在一个实施例中，血流导航器信息用于门控fMRI采集，在另一个实施例中，该信息用于追溯地校正获取的fMRI数据。