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21. 发明授权

US5697370A Method for increasing temporal resolution of MR fluoroscopy 失效
标题翻译：增加MR荧光透视时间分辨率的方法
公开(公告)号：US5697370A
公开(公告)日：1997-12-16
申请号：US587409
申请日：1996-01-17
申请人： Norbert J. Pelc , Stephen G. Hushek
发明人： Norbert J. Pelc , Stephen G. Hushek
IPC分类号： G01R33/54 , A61B5/055 , G01R33/48 , G01R33/561 , G06T1/00
CPC分类号： G01R33/561 , G01R33/4824 , G01R33/5619
摘要： A method is described for increasing the temporal resolution of MR fluoroscopy procedures. A central portion of the image requiring a higher temporal resolution is updated more frequently using less-than-complete newly acquired NMR data. A running average of the signals produced by peripheral structures is used to form the periphery of the image and to remove artifact-producing data from the less-than-complete NMR data.
摘要翻译：描述了用于增加MR荧光透视程序的时间分辨率的方法。使用不完全的新获取的NMR数据更频繁地更新需要更高时间分辨率的图像的中心部分。由外围结构产生的信号的运行平均值用于形成图像的周边，并且从不完整的NMR数据中去除产生伪像的数据。

22. 发明授权

US5257625A Method of noninvasive motion analysis by using forced closure of phase contrast MRI maps of velocity 失效
标题翻译：通过强制关闭速度的相位对比MRI图进行无创运动分析的方法
公开(公告)号：US5257625A
公开(公告)日：1993-11-02
申请号：US865437
申请日：1992-04-09
申请人： Norbert J. Pelc
发明人： Norbert J. Pelc
IPC分类号： G01R33/561 , G01R33/563 , G01R33/567 , A61B5/055
CPC分类号： G01R33/563 , G01R33/5617 , G01R33/56316 , G01R33/5676
摘要： Measures of a velocity component during a plurality of time frames of cyclical motion of a region of interest are obtained using contrast cine MRI techniques. A position error is obtained between a known starting location and a calculated cyclical motion and is used for recalculating cyclical motion of the region of interest using the measures of velocity and the measure of error in velocity.
摘要翻译：使用对比电影MRI技术获得感兴趣区域的循环运动的多个时间帧期间的速度分量的测量。在已知的起始位置和计算的周期运动之间获得位置误差，并且用于使用速度的测量和速度误差的测量来重新计算感兴趣区域的循环运动。

23. 发明授权

US5101156A Rapid flow measurement using an NMR imaging system 失效
标题翻译：使用NMR成像系统进行快速流量测量
公开(公告)号：US5101156A
公开(公告)日：1992-03-31
申请号：US564513
申请日：1990-08-09
申请人： Norbert J. Pelc
发明人： Norbert J. Pelc
IPC分类号： A61B5/055 , G01F1/716 , G01P5/00 , G01P5/18 , G01R33/48 , G01R33/563
CPC分类号： G01R33/56308 , G01F1/716 , G01P5/00 , G01R33/56316
摘要： An NMR system measures the velocity of flowing spins in the presence of stationary spins by performing three separate measurement cycles. The first cycle is a reference, the second cycle includes a magnetic field gradient having an incremental, flow sensitizing first moment .DELTA.M.sub.1, and a third measurement cycle includes a magnetic field gradient having an incremental flow sensitizing first moment -.DELTA.M.sub.1. The resulting NMR signals are processed to produce a velocity measurement.
摘要翻译： NMR系统通过执行三个独立的测量周期来测量存在静止自旋的流动自旋速度。第一个循环是一个参考，第二个循环包括一个磁场梯度，该磁场梯度具有一个增量的流动感应初始力矩DELTA M1，而第三个测量循环包括一个具有增量流敏性第一时刻DELTA M1的磁场梯度。对所得NMR信号进行处理以产生速度测量。

24. 发明授权

US5051903A Method and apparatus for predicting values of a varying periodic phenomenon 失效
标题翻译：用于预测变化周期性现象的值的方法和装置
公开(公告)号：US5051903A
公开(公告)日：1991-09-24
申请号：US393376
申请日：1989-08-14
申请人： Norbert J. Pelc , Stephen W. Flax
发明人： Norbert J. Pelc , Stephen W. Flax
IPC分类号： G01R33/54 , A61B5/055 , G01R33/32 , G01R33/567 , G06F17/18
CPC分类号： G01R33/5673
摘要： An apparatus for reducing image artifacts in NMR imaging matches elements of a set to values of a substantially periodic function so that the values exhibit a predetermined relationship to the elements. The matching is performed by evaluating the relative probability of the values of the substantially periodic function from the samples in the growing database of the values and assigning the values to the elements by using the evaluated relative probability, so as to maximize the probability that subsequent valves may be assigned the remaining elements according the predetermined relationship. A method for correcting the matching of values with elements freezes the database and acquires additional values which are substituted for earlier matched values based on the frozen database.

25. 发明授权

US5005419A Method and apparatus for coherent imaging system 失效
标题翻译：相干成像系统的方法和装置
公开(公告)号：US5005419A
公开(公告)日：1991-04-09
申请号：US207532
申请日：1988-06-16
申请人： Matthew O'Donnell , Kenneth B. Welles, II , Carl R. Crawford , Norbert J. Pelc , Steven G. Karr
发明人： Matthew O'Donnell , Kenneth B. Welles, II , Carl R. Crawford , Norbert J. Pelc , Steven G. Karr
IPC分类号： A61B8/00 , G01N29/06 , G01S7/52 , G01S7/526 , G01S15/89 , G06T1/00
CPC分类号： G01S7/52023 , G01S15/8915
摘要： A method and apparatus for improved digital processing of the analog echo signals in a coherent imaging system is described which simplifies the channel circuitry requirements. The analog echo signals detected with a phased array of transducer elements are first compressed in a non-linear manner then expanded non-linearly with analog-to-digital converter means to provide increased instantaneous dynamic range in the overall system. Representative phased array coherent imaging systems having the improved digital processing means are also disclosed.
摘要翻译：描述了一种用于改进相干成像系统中的模拟回波信号的数字处理的方法和装置，其简化了信道电路要求。用相控阵的换能器元件检测的模拟回波信号首先以非线性方式压缩，然后以模数转换器装置非线性地扩展，以在整个系统中提供增加的瞬时动态范围。还公开了具有改进的数字处理装置的代表性相控阵相干成像系统。

26. 发明授权

US4665365A Method for reversing residual transverse magnetization due to phase-encoding magnetic field gradients 失效
标题翻译：由相位编码磁场梯度反转残余横向磁化的方法
公开(公告)号：US4665365A
公开(公告)日：1987-05-12
申请号：US689428
申请日：1985-01-07
申请人： Gary H. Glover , Norbert J. Pelc
发明人： Gary H. Glover , Norbert J. Pelc
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/54 , G01R33/20
CPC分类号： G01R33/482
摘要： A method for reversing residual transverse magnetization due to spatial encoding magnetic field gradient pulses, used in magnetic resonance imaging to encode spatial information, employs a reversing gradient pulse applied in the same direction as the encoding gradient pulse following the observation of the spin-echo signal. The encoding gradient pulse is applied following the 180.degree. RF pulse to avoid the effects of imperfections associated therewith. In one embodiment, the amplitudes of the encoding and reversing gradient pulses are selected to be approximately the negatives of each other so as to substantially cancel the residual magnetization. In another embodiment, the amplitude of the reversing gradient pulse is selected such that the algebraic sum thereof with the corresponding amplitude of the encoding gradient pulse is a constant. In this case, the residual magnetization is not necessarily cancelled, but rather, is left in the same state after each view of the pulse sequence. The method is applicable to multiple-echo and driven equilibrium pulse sequences.
摘要翻译：用于在磁共振成像中用于编码空间信息的空间编码磁场梯度脉冲的逆向残余横向磁化强度的方法采用与观察自旋回波信号之后的编码梯度脉冲沿相同方向施加的反转梯度脉冲。在180°RF脉冲之后施加编码梯度脉冲，以避免与之相关的缺陷的影响。在一个实施例中，编码和反转梯度脉冲的幅度被选择为彼此近似为负，从而基本上消除剩余磁化。在另一个实施例中，选择反转梯度脉冲的幅度，使得其与编码梯度脉冲的对应幅度的代数和是一常数。在这种情况下，剩余磁化不一定被取消，而是在脉冲序列的每个视图之后保持在相同的状态。该方法适用于多回波和驱动平衡脉冲序列。

27. 发明授权

US4581581A Method of projection reconstruction imaging with reduced sensitivity to motion-related artifacts 失效
标题翻译：投影重建成像方法对运动相关假象的敏感度降低
公开(公告)号：US4581581A
公开(公告)日：1986-04-08
申请号：US509561
申请日：1983-06-30
申请人： Norbert J. Pelc
发明人： Norbert J. Pelc
IPC分类号： A61B10/00 , A61B5/055 , A61B8/14 , A61B8/15 , G01N24/08 , G01R33/28 , G01R33/48 , G01R33/54 , G01R33/567 , G01S15/89 , G01R33/20
CPC分类号： A61B8/15 , G01R33/28 , G01R33/54 , G01S15/8906 , G01R33/56509
摘要： A method is provided for imaging a transverse slice of an object with reduced sensitivity to image artifacts due to object motion during the scan. The method utilizes projection measurements corresponding to at least 180.degree. scan of the slice. The measurements are taken sequentially for views that are adjacent in angle such that measurements which are at the extremes of the scan angle are nevertheless measured at points close in time, reducing inconsistencies therebetween. The method is applicable to a number of modalities utilizing parallel-ray and fan-beam geometries, such as NMR and ultrasound, respectively.
摘要翻译：提供了一种用于对由于扫描过程中的物体运动而导致对图像伪像的敏感性降低的物体的横切片成像的方法。该方法利用对应于切片至少180°扫描的投影测量。对于与角度相邻的视图，顺序地进行测量，使得在接近时间点的位置处测量处于扫描角度的极值处的测量值减少了它们之间的不一致性。该方法适用于使用并行射线和扇形光束几何形状的多种方式，例如NMR和超声波。

28. 发明授权

US07778386B2 Methods for analytic reconstruction for mult-source inverse geometry CT 有权
标题翻译：多源逆几何CT分析重建方法
公开(公告)号：US07778386B2
公开(公告)日：2010-08-17
申请号：US11741359
申请日：2007-04-27
申请人： Zhye Yin , Jed Douglas Pack , Bruno K. B. De Man , Norbert J. Pelc
发明人： Zhye Yin , Jed Douglas Pack , Bruno K. B. De Man , Norbert J. Pelc
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/421
摘要： Disclosed are embodiments of methods for reconstructing x-ray projection data (e.g., one or more sinograms) acquired using a multi-source, inverse-geometry computed tomography (“IGCT”) scanner. One embodiment of a first method processes an IGCT sinogram by rebinning first in “z” and then in “xy,” with feathering applied during the “xy” rebinning. This produces an equivalent of a multi-axial 3rd generation sinogram, which may be further processed using a parallel derivative and/or Hilbert transform. A TOM-window (with feathering) technique and a combines backprojection technique may also be applied to produce a reconstructed volume. An embodiment of a second method processes an IGCT sinogram using a parallel derivative and/or redundancy weighting. The second method may also use signum weighting, TOM-windowing (with feathering), backprojection, and a Hilbert Inversion to produce another reconstructed volume.
摘要翻译：公开了用于重建使用多源反相几何计算机断层摄影（“IGCT”）扫描仪获取的x射线投影数据（例如，一个或多个正弦图）的方法的实施例。第一种方法的一个实施例通过在“z”中首先重新组合，然后在“xy”中重新组合来处理IGCT正弦图，在“xy”重组期间应用羽化。这产生等效的多轴第三代正弦图，其可以使用平行导数和/或希尔伯特变换进一步处理。 TOM窗口（具有羽化）技术和组合的反投影技术也可以应用于产生重建体积。第二种方法的实施例使用并行导数和/或冗余加权处理IGCT正弦图。第二种方法还可以使用信号加权，TOM窗口（具有羽化），反投影和希尔伯特反演来产生另一个重建的体积。

29. 发明申请

US20100202584A1 OPTIMAL WEIGHTS FOR MEASURING SPECTRAL X-RAY DATA 有权
标题翻译：用于测量光谱X射线数据的最佳权重
公开(公告)号：US20100202584A1
公开(公告)日：2010-08-12
申请号：US12700558
申请日：2010-02-04
申请人： Adam S. Wang , Norbert J. Pelc
发明人： Adam S. Wang , Norbert J. Pelc
IPC分类号： G01N23/083
CPC分类号： G01N23/087
摘要： A method for determining a composition of an object using a spectral x-ray system is provided. X-ray photons of at least two different energies are transmitted through the object. The energy of each detected x-ray photon using a detector in the x-ray system is estimated. A first weighted sum of the number of detected photons of each energy is found using a first weighting function, wherein the first weighting function is dependent on the attenuation coefficient function of a first material. In another embodiment, the photons are binned into two energy bins wherein there is a gap between the energy bins.
摘要翻译：提供了一种使用光谱X射线系统确定物体的组成的方法。至少两种不同能量的X射线光子通过物体传输。使用X射线系统中的检测器估计每个检测到的x射线光子的能量。使用第一加权函数找到每个能量的检测光子数量的第一加权和，其中第一加权函数取决于第一材料的衰减系数函数。在另一个实施例中，光子被分成两个能量箱，其中在能量箱之间存在间隙。

30. 发明申请

US20090067569A1 GAIN CORRECTION FOR A CT SYSTEM 有权
标题翻译： CT系统增益校正
公开(公告)号：US20090067569A1
公开(公告)日：2009-03-12
申请号：US11851609
申请日：2007-09-07
申请人： Jongduk Baek , Norbert J. Pelc
发明人： Jongduk Baek , Norbert J. Pelc
IPC分类号： A61B6/03 , G06K9/00
CPC分类号： G06T11/005 , A61B6/032
摘要： A method for imaging unknown objects in a computed tomography (CT) system, comprising determining ray gain for a known object is provided. A CT reconstruction is performed with the known object to obtain reconstructed values. Ideal values are obtained for pixels of the known object. An error related to a difference between the reconstructed values and the ideal values is generated. A ray gain is estimated that reduces the error.
摘要翻译：提供了一种用于对计算机断层摄影（CT）系统中的未知物体进行成像的方法，包括确定已知物体的射线增益。使用已知对象执行CT重建以获得重建的值。为已知对象的像素获得理想值。产生与重建值和理想值之间的差异相关的误差。估计减少误差的射线增益。

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