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1.发明授权公开(公告)号：US06262575B1
公开(公告)日：2001-07-17
申请号：US09161666
申请日：1998-09-29
申请人： Herbert Bruder , Hubertus Fischer
发明人： Herbert Bruder , Hubertus Fischer
IPC分类号： G01R3320
CPC分类号： G01R33/483 , A61B5/055 , A61B5/7285
摘要： In a method for producing an image of fat plaque employing nuclear magnetic resonance tomography, a radio-frequency excitation pulse is emitted with wavelet coding in the presence of a first gradient, refocusing pulses are emitted which are selective to the spectral frequency of fat, and the resulting nuclear magnetic resonance signals are read out in the presence of a further magnetic field gradient. An image of fat plaque with enhanced spatial resolution is thereby produced.
摘要翻译： 在使用核磁共振断层摄影法生产脂肪斑的图像的方法中，在存在第一梯度的情况下，利用小波编码发射射频激发脉冲，发射对于脂肪的光谱频率有选择性的重聚焦脉冲，以及 在存在另外的磁场梯度的情况下读出所得到的核磁共振信号。 由此产生具有增强的空间分辨率的脂肪斑块的图像。
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2.发明授权Method for sensing nuclear magnetic resonance signals given arbitrary gradient shapes 失效用于检测给定任意梯度形状的核磁共振信号的方法
公开(公告)号：US5087880A
公开(公告)日：1992-02-11
申请号：US482963
申请日：1990-02-22
IPC分类号： A61B5/055 , G01R33/48 , G01R33/565
CPC分类号： G01R33/56572 , G01R33/56545
摘要： A method for operating a nuclear resonance imaging device given gradients of arbitrary shapes includes the steps of equidistantly sampling the nuclear magnetic resonance signals in the time domain with a sampling rate that satisfies the sampling theorem, the sampling taking place even given gradients having a non-rectangular pulse shape. Since non-equidistant sampling in the K-space would normally lead to image artifacts, the method includes the further step, to avoid such artifacts, of calculating measured values from the acquired samples by interpolation, these measured values being equidistant in the K-space, and being entered into a measurement matrix. The equidistant sampling in the K-space, which is complicated, is thus superfluous given gradients having an arbitrary pulse shape.
摘要翻译： 给定给定任意形状梯度的核共振成像装置的方法包括以满足采样定理的采样速率等时采样时域中的核磁共振信号的步骤，即使给定梯度具有非线性的采样， 矩形脉冲形状。 由于K空间中的非等距采样通常会导致图像伪影，所以该方法还包括进一步的步骤，为了避免这种伪像，通过插值从所采集的样本中计算测量值，这些测量值在K空间中是等距的 ，并输入测量矩阵。 因此，复杂的K空间中的等距采样因此是具有任意脉冲形状的给定梯度的多余采样。
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公开(公告)号：US5068609A
公开(公告)日：1991-11-26
申请号：US524344
申请日：1990-05-16
IPC分类号： G01R33/565
CPC分类号： G01R33/56554 , G01R33/56545
摘要： A method for generating an image using nuclear magnetic resonance signals, which substantially eliminates the presence of so-called "N/2 ghosts," includes the steps of dividing a measurement matrix into a first sub-matrix containing the even-numbered rows of the measurement matrix and into a second sub-matrix having the odd-numbered rows of the measurement matrix, setting the entries in the remaining rows of the sub-matrices to zero, subjecting both sub-matrices to a Fourier transformation at least in the column direction, thereby generating respective intermediate image matrices, multiplying one of the intermediate image matrices by a factor which is calculated from the edge rows of the intermediate image matrices, and adding the intermediate image matrices after the multiplication.
摘要翻译： 使用核磁共振信号产生图像的方法基本上消除了所谓的“N / 2重影”的存在，包括以下步骤：将测量矩阵划分成包含偶数行的第一子矩阵 测量矩阵和具有测量矩阵的奇数行的第二子矩阵，将子矩阵的剩余行中的条目设置为零，使两个子矩阵至少在列方向上进行傅里叶变换 从而生成各自的中间图像矩阵，将中间图像矩阵中的一个乘以从中间图像矩阵的边缘行计算的因子，并且在相乘之后相加中间图像矩阵。
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公开(公告)号：US09147267B2
公开(公告)日：2015-09-29
申请号：US13674422
申请日：2012-11-12
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
CPC分类号： G06T11/003 , A61B6/032 , A61B6/5205 , G06T11/006 , G06T2211/424
摘要： A method and image reconstruction facility are disclosed for reconstructing an image dataset based on a projection dataset acquired with the aid of an x-ray computed tomography apparatus. With an embodiment of the method, a first image dataset is reconstructed based on the projection dataset and an edge image dataset is generated, which indicates a measure of an edge strength of edges occurring in at least one spatial/temporal direction in the first image dataset, as a function of location. An output image dataset is then generated based on the first image dataset, with the resolution in the first image dataset being increased as a function of location in at least one spatial/temporal direction taking into account the edge image dataset.
摘要翻译： 公开了一种基于通过X射线计算机断层摄影装置获得的投影数据集来重构图像数据集的方法和图像重建装置。 利用该方法的实施例，基于投影数据集重建第一图像数据集，并且生成边缘图像数据集，其指示在第一图像数据集中的至少一个空间/时间方向上出现的边缘的边缘强度的度量 ，作为位置的函数。 然后，基于第一图像数据集生成输出图像数据集，其中第一图像数据集中的分辨率随着至少一个空间/时间方向的位置而增加，同时考虑边缘图像数据集。
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公开(公告)号：US08892187B2
公开(公告)日：2014-11-18
申请号：US11727751
申请日：2007-03-28
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
CPC分类号： G06T3/4007 , A61B6/032 , A61B6/503 , A61B6/5217 , G06T7/246 , G06T2207/30048 , G06T2211/412
摘要： A method is disclosed for reducing step artifacts in the forward increment direction of a cardio CT representation. In at least one embodiment, volume recordings or section images of first and second sub-volumes of a heart volume, which lie adjacent to one another in the forward increment direction and partially overlap in an overlap region, are recorded by a computer tomography system. Each sub-volume's detector data is used for the reconstruction coming from different heart cycles. Finally, a displacement vector relative to a second sub-volume is determined at least for a selected point of the overlap region of a first sub-volume and the second sub-volume is subjected at least partially to a spatial transformation according to the at least one displacement vector.
摘要翻译： 公开了一种用于减少心脏CT表示的向前增量方向上的步骤伪像的方法。 在至少一个实施例中，通过计算机断层摄影系统记录心脏体积的第一和第二子体积的体积记录或分段图像，其以正向增量方向彼此相邻并且在重叠区域中部分重叠。 每个子体积的检测器数据用于来自不同心脏周期的重建。 最后，至少对于第一子体积的重叠区域的选定点确定相对于第二子体积的位移矢量，并且至少部分地将第二子体积至少部分地进行空间变换，至少 一个位移矢量。
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公开(公告)号：US08718343B2
公开(公告)日：2014-05-06
申请号：US13111315
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , A61B6/5258 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measured data, wherein the measured data was captured previously during a relative rotary motion between a radiation source of a computed tomography system and the examination object. In at least one embodiment, the measured data is modified to achieve a particular grayscale characteristic of the image data to be reconstructed. The image data is calculated by way of an iterative algorithm using the modified measured data, wherein no arithmetic step for reducing noise is employed in the iterations.
摘要翻译： 公开了一种用于从测量数据重建检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动期间先前捕获测量数据。 在至少一个实施例中，修改测量数据以实现要重建的图像数据的特定灰度特性。 通过使用修改的测量数据的迭代算法计算图像数据，其中在迭代中不采用用于降低噪声的算术步骤。
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7.发明授权公开(公告)号：US08639003B2
公开(公告)日：2014-01-28
申请号：US12710423
申请日：2010-02-23
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , G06T5/50 , G06T11/005 , G06T2207/10081 , G06T2207/10144 , G06T2207/20012 , G06T2207/20056 , G06T2207/20216 , G06T2207/30004
摘要： Method for the noise reduction of CT image data and an image processing system are disclosed, with a scanning of an examination object and generation of at least two CT image data records each taking place on the basis of a different x-ray energy spectrum. In at least one embodiment, a break-down of the data image records into at least two broken-down image data records takes place in each instance, with a lowest local frequency band (f(1)) with the index k=1 and at least one high local frequency band (f(k)) with the index k=2 to N. In at least one embodiment, the determination of the noise into at least one of the image data records per x-ray energy spectrum and calculation of at least one new image data record takes place in each instance by using an unchanged broken-down image data record with the lowest local frequency band and an image data record, generated from a noise-minimized weighted combination of broken-down image data records, which originate from the scannings using different x-ray energy spectra.
摘要翻译： 公开了用于CT图像数据的降噪的方法和图像处理系统，其中扫描检查对象并且基于不同的x射线能量谱产生至少两个CT图像数据记录。 在至少一个实施例中，数据图像记录分解成至少两个分解图像数据记录，每个情况下都具有索引k = 1的最低本地频带（f（1）），并且 至少一个具有索引k = 2至N的高本地频带（f（k））。在至少一个实施例中，将噪声确定为每个x射线能谱和计算中的至少一个图像数据记录 至少一个新的图像数据记录在每个实例中通过使用从分解图像数据记录的噪声最小化的加权组合产生的具有最低本地频带和图像数据记录的未变分解图像数据记录来进行 ，其来源于使用不同x射线能谱的扫描。
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公开(公告)号：US08605977B2
公开(公告)日：2013-12-10
申请号：US12874302
申请日：2010-09-02
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/482 , A61B6/507 , G06T5/002 , G06T2207/10081 , G06T2207/20012 , G06T2207/30004 , H04N1/409
摘要： A method is disclosed for reconstruction of image data of an examination object from measured data, wherein the measured data was captured during a relative rotational motion between a radiation source of a computed tomography system and the examination object. Image data of the examination object is determined from the measured data. In at least one embodiment, new image data is obtained by noise-reducing processing of the image data, in which weighted high-pass filtering of the image data is performed, the weighting taking account of differences between pixel values of different pixels such that increasing differences result in a weaker high-pass effect. A noise-reducing smoothing of the image data is performed using the weighted high-pass filtering.
摘要翻译： 公开了一种用于从测量数据重建检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动期间捕获测量数据。 从测量数据确定检查对象的图像数据。 在至少一个实施例中，通过对图像数据进行加权高通滤波的图像数据的噪声降低处理来获得新的图像数据，加权考虑不同像素的像素值之间的差异，使得增加 差异导致较弱的高通效应。 使用加权高通滤波来执行图像数据的降噪平滑处理。
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公开(公告)号：US08600137B2
公开(公告)日：2013-12-03
申请号：US13111244
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been captured during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first image data is computed by the measurement data being modified to obtain a specific gray value characteristic of the first image data to be reconstructed and the first image data is computed by way of an iterative algorithm using the modified measurement data. Second image data is also computed by a series of chronologically-consecutive images being reconstructed and processing being carried out on the series of images to reduce temporal noise. Finally a combination of the first and the second image data is carried out.
摘要翻译： 公开了一种用于从测量数据重建被检查对象的图像数据的方法，其中测量数据已经在计算机断层摄影系统的辐射源与被检查物体之间的相对旋转运动期间被捕获。 在至少一个实施例中，通过修改的测量数据来计算第一图像数据，以获得要重建的第一图像数据的特定灰度特性，并且通过使用修改的测量数据的迭代算法来计算第一图像数据 。 还通过一系列按时间顺序重新连续的图像来计算第二图像数据，并且对该系列图像进行处理以减少时间噪声。 最后，执行第一和第二图像数据的组合。
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10.发明申请公开(公告)号：US20110293159A1
公开(公告)日：2011-12-01
申请号：US13111244
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been captured during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first image data is computed by the measurement data being modified to obtain a specific gray value characteristic of the first image data to be reconstructed and the first image data is computed by way of an iterative algorithm using the modified measurement data. Second image data is also computed by a series of chronologically-consecutive images being reconstructed and processing being carried out on the series of images to reduce temporal noise. Finally a combination of the first and the second image data is carried out.
摘要翻译： 公开了一种用于从测量数据重建被检查对象的图像数据的方法，其中测量数据已经在计算机断层摄影系统的辐射源与被检查物体之间的相对旋转运动期间被捕获。 在至少一个实施例中，通过修改的测量数据来计算第一图像数据，以获得要重建的第一图像数据的特定灰度特性，并且通过使用修改的测量数据的迭代算法来计算第一图像数据 。 还通过一系列按时间顺序重新连续的图像来计算第二图像数据，并且对该系列图像执行处理以减少时间噪声。 最后，执行第一和第二图像数据的组合。
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