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1.发明授权Data binning method and apparatus for pet tomography including remote services over a network 失效用于宠物层析成像的数据合并方法和装置，包括通过网络的远程服务公开(公告)号：US06337481B1
公开(公告)日：2002-01-08
申请号：US09439442
申请日：1999-11-15
IPC分类号： G01T1166
CPC分类号： G01T1/172 , A61B6/037 , G01T1/2985 , G01T7/00
摘要： A method to be used with an imaging system, the system including two opposed cameras mounted for rotation among a plurality of acquisition angles about an imaging axis for acquiring imaging data throughout an arc about the axis, the cameras collecting data corresponding to an acquisition angle range including a plurality of flight path angles at each acquisition angle, the system also including a processor having a processor memory. The method reduces the amount of processor memory required to acquire imaging data by including the steps of (a) after gathering imaging information at an acquisition angle, for each flight path angle within the acquisition angle range, determining if additional data will be collected during acquisition at the next consecutive Q acquisition angles; (b) where imaging data for a flight path angle will be collected during data acquisition at at least one of the next Q acquisition angles, maintaining imaging data for the flight path angle in the processor memory; and (c) where imaging data for a flight path angle will not be collected during data acquisition at at least one of the next Q acquisition angles, communicating the imaging data to a remote facility to store the imaging data for the flight path angle in a remote storage device via a network and to provide remote services to the imaging system.
摘要翻译： 一种与成像系统一起使用的方法，所述系统包括两个相对的相机，所述摄像机安装成围绕成像轴在多个获取角度之间旋转，用于在围绕所述轴的整个弧线处获取成像数据，所述相机收集对应于采集角度范围的数据 在每个采集角度包括多个飞行路径角度，该系统还包括具有处理器存储器的处理器。 该方法通过以下步骤来减少获取成像数据所需的处理器存储器的数量：（a）在采集角度收集成像信息之后，针对采集角度范围内的每个飞行路径角度，确定在采集期间是否收集附加数据 在下一个连续的Q采集角度; （b）其中在数据采集期间将在下一个Q采集角度中的至少一个采集飞行路径角度的成像数据，维持处理器存储器中飞行路径角度的成像数据; 和（c）其中在至少一个下一个Q采集角度的数据采集期间不会收集用于飞行路径角度的成像数据，将成像数据传送到远程设备以将飞行路径角度的成像数据存储在 远程存储设备，并向成像系统提供远程服务。
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公开(公告)号：US06307203B1
公开(公告)日：2001-10-23
申请号：US09200289
申请日：1998-11-25
IPC分类号： G01T1166
CPC分类号： G01T1/2985 , A61B6/037 , G01T1/172
摘要： A method for reducing required memory in a PET acquisition system processor wherein imaging data is collected and binned in a two dimensional histogram of coincident counts, the two dimensions being a flight path angle &thgr; and a distance R from the center of an imaging area, the method including the steps of determining when data acquired at a current acquisition angle will not include data corresponding to a specific flight angle and, when this is the case, storing the data corresponding to the specific flight angle on a secondary memory storage device independent of the processor memory. The method also includes a back projection method for using the stored data to construct an image and the invention includes an apparatus for performing the method.
摘要翻译： 一种用于减少PET采集系统处理器中所需存储器的方法，其中成像数据以重合计数的二维直方图被收集和分样，二维是来自成像区域的中心的飞行路径角度θ和距离R， 方法包括以下步骤：确定何时以当前获取角度获取的数据将不包括对应于特定飞行角度的数据，并且在这种情况下，将与特定飞行角度相对应的数据存储在辅助存储器存储设备上，独立于 处理器内存 该方法还包括使用所存储的数据构建图像的背投影方法，并且本发明包括用于执行该方法的装置。
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公开(公告)号：US06373059B1
公开(公告)日：2002-04-16
申请号：US09702334
申请日：2000-10-31
IPC分类号： G01T120
CPC分类号： G01T1/2985 , A61B6/037
摘要： A PET scanner is disclosed which includes a gantry, a plurality of sets of detectors supported by the gantry, and a plurality of septa that are supported by the gantry and are constructed of material which blocks photons. The detectors in each set are disposed in a plane and positioned around a central axis that intersects the plane, and the plurality of sets of detectors are spaced along the central axis. The septa are spaced along the central axis to separate groups of two or more detector sets and block external photons from reaching the detectors. The PET scanner further includes a processor means for receiving signals produced by the detectors and indicating annihilation events occurring within a central region around the central axis, and for reconstructing an image from indicated annihilation events.
摘要翻译： 公开了一种PET扫描器，其包括台架，由台架支撑的多组检测器和由台架支撑并由阻挡光子的材料构成的多个隔片。 每组中的检测器设置在平面中并且围绕与该平面相交的中心轴定位，并且多组检测器沿着中心轴线间隔开。 隔片沿着中心轴线间隔开以分离两组或更多个检测器组，并阻止外部光子到达检测器。 PET扫描器还包括处理器装置，用于接收由检测器产生的信号，并指示在围绕中心轴线的中心区域内发生的湮灭事件，以及用于从指示的湮灭事件重建图像。
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4.发明授权
公开(公告)号：US5543622A
公开(公告)日：1996-08-06
申请号：US515461
申请日：1995-08-15
申请人： Charles W. Stearns
发明人： Charles W. Stearns
CPC分类号： G01T1/2985 , A61B6/037
摘要： An algorithm for creating a normalization data array to use in generating a three-dimensional image is described. In one embodiment, the algorithm includes performing the steps of acquiring geometric factors from a two-dimensional normalization scan, determining the three-dimensional crystal sensitivities from a three-dimensional phantom acquisition scan, and using such geometric factors and crystal sensitivities, creating a three-dimensional normalization data array.
摘要翻译： 描述用于创建用于生成三维图像的归一化数据阵列的算法。 在一个实施例中，该算法包括执行以下步骤：从二维归一化扫描获取几何因子，从三维幻影获取扫描确定三维晶体灵敏度，并使用这些几何因子和晶体敏感度，创建三维 维数归一化数据数组。
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5.发明申请公开(公告)号：US20080164875A1
公开(公告)日：2008-07-10
申请号：US11621622
申请日：2007-01-10
CPC分类号： G01R33/481 , G01R33/28 , G01T1/1603
摘要： A system and method for simultaneously acquiring PET and MR data from a subject of interest with a hybrid PET-MR scanner includes monitoring transmission times of RF and gradient coils of the MR equipment and blanking segments of the PET data stream accordingly. By excluding PET data acquired during active MR transmissions, the remaining PET data used for image reconstruction will provide improved PET image quality.
摘要翻译： 利用混合PET-MR扫描仪同时从感兴趣的对象采集PET和MR数据的系统和方法包括相应地监测MR设备的RF设备和梯形线圈的传输时间以及PET数据流的消隐段。 通过排除在有源MR传输期间获取的PET数据，用于图像重建的剩余PET数据将提供改进的PET图像质量。
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公开(公告)号：US06462342B1
公开(公告)日：2002-10-08
申请号：US09602104
申请日：2000-06-22
申请人： Charles W. Stearns
发明人： Charles W. Stearns
IPC分类号： G01T1166
CPC分类号： G06T11/005 , A61B6/037 , G01T1/2985
摘要： A method and system for processing data in a PET scanner is provided, in which a projection plane data set is converted into a two-dimensional sinogram data set. The method includes (1) selecting a subset of projection plane data from the projection plane data set, (2) performing a set of Fourier transforms, respectively, on a plurality of data rows within the subset of projection plane data to obtain a transformed data set, and (3) performing an additional set of Fourier transforms on the transformed data set to obtain intermediate results. The additional set of Fourier transforms includes a plurality of individual Fourier transforms respectively corresponding to a plurality of combinations of at least two indices. The method additionally includes (4) rebinning the intermediate results into a first array, the first array having at least a first dimension corresponding to a physical dimension of the PET scanner, (5) repeating (1)-(4) for each of the remaining subsets of projection plane data, to provide a complete data set within the first array, and (6) performing a set of inverse Fourier transforms with respect to the complete data set to provide the two-dimensional sinogram data set.
摘要翻译： 提供了一种用于在PET扫描仪中处理数据的方法和系统，其中投影平面数据集被转换为二维正弦图数据集。 该方法包括（1）从投影平面数据集中选择投影平面数据的子集，（2）分别在投影平面数据子集内的多个数据行上执行一组傅里叶变换，以获得变换数据 设置，和（3）在变换数据集上执行附加的傅立叶变换集合以获得中间结果。 附加的傅立叶变换组包括分别对应于至少两个索引的多个组合的多个单独的傅里叶变换。 该方法还包括（4）将中间结果重新组合成第一阵列，第一阵列至少具有与PET扫描仪的物理尺寸相对应的第一尺寸，（5）对于每个扫描仪的每一个重复（1） - （4） 投影平面数据的剩余子集，以在第一阵列内提供完整的数据集，以及（6）相对于完整数据集执行一组逆傅里叶变换以提供二维正弦图数据集。
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公开(公告)号：US5424946A
公开(公告)日：1995-06-13
申请号：US234093
申请日：1994-04-28
申请人： Charles W. Stearns
发明人： Charles W. Stearns
CPC分类号： G01T1/2985 , A61B6/037
摘要： A positron emission tomography scanner detects coincident annihilation events occurring in the field of view of a detector array and stores them as a two-dimensional sinogram array. Prior to image reconstruction, the sinogram transmission data is filtered along both dimensions (R, .theta.) to improve image quality. Row direction (R) filtering is manually selected, and column direction (.theta.) filtering is calculated automatically as a function of the amount of row direction filtering selected and the size of the object being imaged relative to the scanner's field of view.
摘要翻译： 正电子发射断层摄影扫描仪检测在检测器阵列的视野中发生的重合湮灭事件，并将其存储为二维正弦图阵列。 在图像重建之前，正弦图传输数据沿着两个维度（R，θ）被滤波，以提高图像质量。 手动选择行方向（R）滤波，并且根据所选择的行方向滤波量和相对于扫描仪的视场成像对象的大小自动计算列方向（theta）滤波。
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8.发明授权公开(公告)号：US07847552B2
公开(公告)日：2010-12-07
申请号：US11621622
申请日：2007-01-10
IPC分类号： G01V3/00
CPC分类号： G01R33/481 , G01R33/28 , G01T1/1603
摘要： A system and method for simultaneously acquiring PET and MR data from a subject of interest with a hybrid PET-MR scanner includes monitoring transmission times of RF and gradient coils of the MR equipment and blanking segments of the PET data stream accordingly. By excluding PET data acquired during active MR transmissions, the remaining PET data used for image reconstruction will provide improved PET image quality.
摘要翻译： 利用混合PET-MR扫描仪同时从感兴趣的对象采集PET和MR数据的系统和方法包括相应地监测MR设备的RF设备和梯形线圈的传输时间以及PET数据流的消隐段。 通过排除在有源MR传输期间获取的PET数据，用于图像重建的剩余PET数据将提供改进的PET图像质量。
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9.发明授权Method for converting digital image pixel values including remote services provided over a network 有权用于转换包括通过网络提供的远程服务的数字图像像素值的方法公开(公告)号：US06731798B1
公开(公告)日：2004-05-04
申请号：US09440233
申请日：1999-11-15
申请人： Charles W. Stearns
发明人： Charles W. Stearns
IPC分类号： G06K900
CPC分类号： G06T5/009 , A61B6/581 , G06T5/40 , G06T2207/10116
摘要： A method for converting digitized image pixel values from a first range to a second range including (a) determining a lower limit value of a relevant portion of the first range; (b) generating an intensity histogram representative of pixel populations having specified intensities, and transforming the histogram to generate a log-transformed histogram; (c) identifying a threshold value for an upper limit of log-transformed values from the log-transformed histogram; (d) identifying a population of pixels having log-transformed values having a desired relationship to the threshold value; (e) determining an upper limit value of the relevant portion of the first range based upon the identified population; (f) converting the pixel values to converted values over the second range based upon the lower and upper limit values; and (g) transmitting information relating to an image associated with the pixel values or sources thereof between a first location and a second location remote from the first location to provide remote services.
摘要翻译： 一种将数字化图像像素值从第一范围转换为第二范围的方法，包括（a）确定第一范围的相关部分的下限值; （b）产生代表具有指定强度的像素群体的强度直方图，并且变换直方图以生成对数变换直方图; （c）从对数变换的直方图中识别对数变换值的上限的阈值; （d）识别具有对所述阈值具有期望关系的对数变换值的像素群; （e）基于所识别的群体确定第一范围的相关部分的上限值; （f）基于下限值和上限值将像素值转换成在第二范围上的转换值; 以及（g）在远离所述第一位置的第一位置和第二位置之间传送与其像素值或其源相关联的图像的信息以提供远程服务。
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公开(公告)号：US5272343A
公开(公告)日：1993-12-21
申请号：US920350
申请日：1992-07-27
申请人： Charles W. Stearns
发明人： Charles W. Stearns
CPC分类号： G01T1/2985 , G01T1/172
摘要： A PET scanner includes an orbiting source of positron emissions which is employed in an attenuation scan to collect attenuation data used to correct image data acquired during an emission scan. In addition, the orbiting source is used in a coincidence timing calibration scan to acquire timing information employed to calibrate the scanner electronics. Time-of-flight errors in the calibration timing information due to the use of an off-center emissions source are eliminated by a sorter which separates the timing data as a function of the position of the orbiting source.
摘要翻译： PET扫描器包括正电子发射的轨道源，其用于衰减扫描以收集用于校正在发射扫描期间获取的图像数据的衰减数据。 此外，轨道源用于一致的定时校准扫描，以获取用于校准扫描仪电子装置的定时信息。 由于使用偏心排放源导致的校准定时信息中的飞行时间误差由分类器消除，分选器将定时数据作为轨道源的位置的函数。
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