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21. 发明授权

US07507968B2 Systems and methods for correcting a positron emission tomography emission image 失效
标题翻译：用于校正正电子发射断层摄影发射图像的系统和方法
公开(公告)号：US07507968B2
公开(公告)日：2009-03-24
申请号：US10462914
申请日：2003-06-17
申请人： Scott David Wollenweber , Alexander Ganin
发明人： Scott David Wollenweber , Alexander Ganin
IPC分类号： G01T1/161 , G01N23/00 , G06K9/00
CPC分类号： A61B6/032 , A61B5/02755 , A61B5/14532 , A61B5/4041 , A61B6/037 , G01T1/2985 , G06T11/005 , G06T2211/432
摘要： A method for correcting a positron emission tomography (PET) emission image is described. The method includes obtaining a PET emission sinogram of an object, obtaining a computed tomography (CT) image for a scanned portion of the object, the object having a truncated portion outside a field of view (FOV) of a CT image, determining a correction set of CT data based on a measured set of CT data within the CT sinogram, generating modified attenuation correction factors from the measured and correction sets of CT data, and correcting the PET sinogram using the modified attenuation correction factors.
摘要翻译：描述了用于校正正电子发射断层摄影（PET）发射图像的方法。该方法包括获得物体的PET发射正弦图，获得被扫描的物体的扫描部分的计算机断层摄影（CT）图像，该物体在CT图像的视场（FOV）之外具有截断部分，确定校正基于CT正弦图内的CT数据的一组CT数据，从CT数据的测量和校正集中产生修正的衰减校正因子，并使用修正的衰减校正因子校正PET正弦图。

22. 发明授权

US06466017B1 MRI system with modular gradient system 失效
标题翻译：具有模块梯度系统的MRI系统
公开(公告)号：US06466017B1
公开(公告)日：2002-10-15
申请号：US09453274
申请日：1999-12-02
申请人： Alexander Ganin , Kevin F. King
发明人： Alexander Ganin , Kevin F. King
IPC分类号： G01V300
CPC分类号： G01R33/482
摘要： A magnetic resonance imaging system has a primary set of whole-body gradient coils and a supplemental set of gradient coils. The supplemental gradient coils are employed to produce imaging gradients when fast imaging pulse sequences are performed, and the primary set of gradient coils are employed when interleaved saturation or navigator signals pulse sequences are performed during a scan.
摘要翻译：磁共振成像系统具有一组全身梯度线圈和一组补充梯度线圈。当执行快速成像脉冲序列时，补充梯度线圈用于产生成像梯度，并且当在扫描期间执行交错饱和度或导航信号脉冲序列时采用梯度线圈的主要集合。

23. 发明授权

US06422749B1 Imaging system with X-ray beam angulation compensation 有权
标题翻译：成像系统具有X射线束角度补偿
公开(公告)号：US06422749B1
公开(公告)日：2002-07-23
申请号：US09615475
申请日：2000-07-13
申请人： Vincent S. Polkus , Alexander Ganin , Jon C. Omernick , Ping Xue
发明人： Vincent S. Polkus , Alexander Ganin , Jon C. Omernick , Ping Xue
IPC分类号： A61B608
CPC分类号： A61B6/00 , A61B6/08
摘要： In an X-ray imaging system, an arrangement is provided for readily aligning the system detector with the X-ray beam field, i.e., the projection of the X-ray beam into the plane of the detector. The arrangement is adapted for correcting or compensating for distortion which results from X-ray beam angulation, wherein the beam is projected toward the detector plane at an angle of less than 90°. Initially, the system X-ray tube is positioned to project the X-ray beam at a given beam direction angle &phgr;. A beam width angle &ggr;1 is then computed, from the given angle &phgr; and from specified values of the source-to-image distance and the length of the projected beam field. Thereupon, an offset value is determined from &ggr;1, &phgr; and the source-to-image distance to locate the geometric center of the beam field, and the center of the detector is aligned therewith.
摘要翻译：在X射线成像系统中，提供了一种用于容易地将系统检测器与X射线束场对准的装置，即将X射线束投影到检测器的平面中。该装置适于校正或补偿由X射线束角度变形引起的变形，其中光束以小于90°的角度朝向检测器平面投影。最初，系统X射线管被定位成以给定的光束方向角度phi投射X射线束。然后从给定角度phi和源到图像距离的特定值和投影光束场的长度来计算波束宽度角度γ1。因此，从γ1，phi和源到图像距离确定偏移值以定位波束场的几何中心，并且检测器的中心与其对准。

24. 发明授权

US5998996A Correction of artifacts caused by Maxwell terms in phase contrast angiography 失效
标题翻译：校正由相对比血管造影术中的麦克斯韦术引起的假象
公开(公告)号：US5998996A
公开(公告)日：1999-12-07
申请号：US826183
申请日：1997-03-27
申请人： Matthew A. Bernstein , Xiaohang Zhou , Kevin F. King , Alexander Ganin , Gary H. Glover , Norbert J. Pelc , Jason A. Polzin
发明人： Matthew A. Bernstein , Xiaohang Zhou , Kevin F. King , Alexander Ganin , Gary H. Glover , Norbert J. Pelc , Jason A. Polzin
IPC分类号： G01R33/54 , A61B5/055 , G01R33/563 , G01R33/565 , G01V3/00
CPC分类号： G01R33/56581 , G01R33/56308
摘要： A method is presented for correcting Maxwell term error artifacts produced by an NMR system during the production of either a phase contrast angiogram or a complex difference angiogram. Phase corrections are made to the reconstructed phase image to eliminate the artifacts. Correction coefficients calculated from the flow encoding magnetic gradient waveforms of the phase contrast pulse sequence are used in a polynomial to calculate a set of phase error corrections. These corrections are then used to adjust the phase at each pixel of the angiogram image.
摘要翻译：提出了一种用于在生产相位对比血管造影或复杂差异血管造影图中校正由NMR系统产生的麦克斯韦尔术语误差伪像的方法。对重建的相位图像进行相位校正，以消除伪影。由相位对比脉冲序列的流量编码磁梯度波形计算的校正系数用于多项式以计算一组相位误差校正。然后使用这些校正来调整血管造影图像的每个像素处的相位。

25. 发明授权

US08699771B2 Method and apparatus for reducing motion-related imaging artifacts 有权
标题翻译：用于减少运动相关成像伪影的方法和装置
公开(公告)号：US08699771B2
公开(公告)日：2014-04-15
申请号：US12622006
申请日：2009-11-19
申请人： Scott David Wollenweber , Alexander Ganin , Kris Filip Johan Jules Thielemans , Larry Pierce , Adam Alessio , Paul Kinahan , Chi Liu
发明人： Scott David Wollenweber , Alexander Ganin , Kris Filip Johan Jules Thielemans , Larry Pierce , Adam Alessio , Paul Kinahan , Chi Liu
IPC分类号： A61B6/03
CPC分类号： A61B6/469 , A61B6/032 , A61B6/037 , A61B6/486 , A61B6/503 , A61B6/508 , A61B6/5235 , A61B6/5247 , A61B6/527 , A61B6/5288 , G06T7/20 , G06T2207/10072 , G06T2207/30004
摘要： A method and apparatus are provided for reducing motion related imaging artifacts. The method includes obtaining an image data set of a region of interest in an object, obtaining a motion signal indicative of motion of the region of interest, determining at least one quiescent period of at least a portion of the motion signal, extracting image data from the image data set that is within the determined quiescent period to form an image data subset, and generating an image of the region of interest using the image data subset.
摘要翻译：提供了一种用于减少运动相关成像伪影的方法和装置。该方法包括获得对象中的感兴趣区域的图像数据集，获得表示感兴趣区域运动的运动信号，确定运动信号的至少一部分的至少一个静止周期，从所述图像数据集合在所确定的静止周期内，以形成图像数据子集，以及使用所述图像数据子集生成所述感兴趣区域的图像。

26. 发明授权

US08131044B2 Method and apparatus for determining the effectiveness of an image transformation process 有权
标题翻译：用于确定图像变换过程的有效性的方法和装置
公开(公告)号：US08131044B2
公开(公告)日：2012-03-06
申请号：US12099261
申请日：2008-04-08
申请人： Scott David Wollenweber , Alexander Ganin , Ravindra Manjeshwar , Girishankar Gopalakrishnan , Evren Asma
发明人： Scott David Wollenweber , Alexander Ganin , Ravindra Manjeshwar , Girishankar Gopalakrishnan , Evren Asma
IPC分类号： A61B6/03
CPC分类号： G01T1/1611 , A61B6/032 , A61B6/037 , A61B6/508 , A61B6/5235 , A61B6/541 , G06T7/30 , G06T2207/10076 , G06T2207/10081 , G06T2207/10104 , G06T2207/30004
摘要： A method for determining the effectiveness of an image transformation process includes acquiring a four-dimensional (4D) image data set, sorting the 4D image data set into separate field-of-view bins using a temporal gating system generating a plurality of deformation vectors using the sorted 4D image data set, and using the plurality of deformation vectors to generate a transformation effectiveness value that is representative of the effectiveness of the image transformation process. The method further includes acquiring a respiratory signal, calculating a power spectrum of the respiratory signal, calculating a power spectrum for each of the plurality of deformation vectors, and comparing the power spectrum of the respiratory signal to the power spectrum of the plurality of deformation vectors to generate the transformation effectiveness value.
摘要翻译：一种用于确定图像变换过程的有效性的方法包括获取四维（4D）图像数据集，使用使用多个变形向量生成多个变形向量的时间门控系统将4D图像数据集排列成单独的视野区域分类的4D图像数据集，并且使用多个变形向量来生成代表图像变换处理的有效性的变换有效值。该方法还包括获取呼吸信号，计算呼吸信号的功率谱，计算多个变形矢量中的每一个的功率谱，并将呼吸信号的功率谱与多个变形矢量的功率谱进行比较以产生变换有效值。

27. 发明授权

US08098916B2 System and method for image-based attenuation correction of PET/SPECT images 有权
标题翻译： PET / SPECT图像基于图像的衰减校正的系统和方法
公开(公告)号：US08098916B2
公开(公告)日：2012-01-17
申请号：US12118170
申请日：2008-05-09
申请人： Kris Flip Johan Jules Thielemans , Alexander Ganin , Evren Asma , Ravindra Mohan Manjeshwar
发明人： Kris Flip Johan Jules Thielemans , Alexander Ganin , Evren Asma , Ravindra Mohan Manjeshwar
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/5235 , G06T7/30 , G06T2207/10081 , G06T2207/10104 , G06T2207/30048 , G06T2207/30061
摘要： A system and method for image-based correction including a receiver to acquire an image from one or more data storage systems, one or more processors to determine an attenuation mismatch estimate and calculate a correction for the image based on the attenuation mismatch estimate and the image, and an output to generate an attenuation mismatch corrected image based on the correction.
摘要翻译：一种用于基于图像的校正的系统和方法，包括从一个或多个数据存储系统获取图像的接收器，用于确定衰减失配估计的一个或多个处理器，并且基于衰减失配估计和图像计算图像的校正，以及用于基于校正产生衰减失配校正图像的输出。

28. 发明申请

US20110116695A1 METHOD AND APPARATUS FOR REDUCING MOTION-RELATED IMAGING ARTIFACTS 有权
标题翻译：减少运动相关成像艺术的方法和装置
公开(公告)号：US20110116695A1
公开(公告)日：2011-05-19
申请号：US12622006
申请日：2009-11-19
申请人： Scott David Wollenweber , Alexander Ganin , Kris Filip Johan Jules Thielemans , Larry Pierce , Adam Alessio , Paul Kinahan , Chi Liu
发明人： Scott David Wollenweber , Alexander Ganin , Kris Filip Johan Jules Thielemans , Larry Pierce , Adam Alessio , Paul Kinahan , Chi Liu
IPC分类号： G06K9/00 , G06K9/40
CPC分类号： A61B6/469 , A61B6/032 , A61B6/037 , A61B6/486 , A61B6/503 , A61B6/508 , A61B6/5235 , A61B6/5247 , A61B6/527 , A61B6/5288 , G06T7/20 , G06T2207/10072 , G06T2207/30004
摘要： A method and apparatus are provided for reducing motion related imaging artifacts. The method includes obtaining an image data set of a region of interest in an object, obtaining a motion signal indicative of motion of the region of interest, determining at least one quiescent period of at least a portion of the motion signal, extracting image data from the image data set that is within the determined quiescent period to form an image data subset, and generating an image of the region of interest using the image data subset.
摘要翻译：提供了一种用于减少运动相关成像伪影的方法和装置。该方法包括获得对象中的感兴趣区域的图像数据集，获得表示感兴趣区域运动的运动信号，确定运动信号的至少一部分的至少一个静止周期，从所述图像数据集合在所确定的静止周期内，以形成图像数据子集，以及使用所述图像数据子集生成所述感兴趣区域的图像。

29. 发明申请

US20090253980A1 METHOD AND APPARATUS FOR DETERMINING THE EFFECTIVENESS OF AN IMAGE TRANSFORMATION PROCESS 有权
标题翻译：用于确定图像变换过程的有效性的方法和装置
公开(公告)号：US20090253980A1
公开(公告)日：2009-10-08
申请号：US12099261
申请日：2008-04-08
申请人： Scott David Wollenweber , Alexander Ganin , Ravindra Manjeshwar , Girishankar Gopalakrishnan , Evren Asma
发明人： Scott David Wollenweber , Alexander Ganin , Ravindra Manjeshwar , Girishankar Gopalakrishnan , Evren Asma
IPC分类号： A61B5/05
CPC分类号： G01T1/1611 , A61B6/032 , A61B6/037 , A61B6/508 , A61B6/5235 , A61B6/541 , G06T7/30 , G06T2207/10076 , G06T2207/10081 , G06T2207/10104 , G06T2207/30004
摘要： A method for determining the effectiveness of an image transformation process includes acquiring a four-dimensional (4D) image data set, sorting the 4D image data set into separate field-of-view bins using a temporal gating system generating a plurality of deformation vectors using the sorted 4D image data set, and using the plurality of deformation vectors to generate a transformation effectiveness value that is representative of the effectiveness of the image transformation process. The method further includes acquiring a respiratory signal, calculating a power spectrum of the respiratory signal, calculating a power spectrum for each of the plurality of deformation vectors, and comparing the power spectrum of the respiratory signal to the power spectrum of the plurality of deformation vectors to generate the transformation effectiveness value.
摘要翻译：一种用于确定图像变换过程的有效性的方法包括获取四维（4D）图像数据集，使用使用多个变形向量生成多个变形向量的时间门控系统将4D图像数据集排列成单独的视野区域分类的4D图像数据集，并且使用多个变形向量来生成代表图像变换处理的有效性的变换有效值。该方法还包括获取呼吸信号，计算呼吸信号的功率谱，计算多个变形矢量中的每一个的功率谱，并将呼吸信号的功率谱与多个变形矢量的功率谱进行比较以产生变换有效值。

30. 发明申请

US20090238427A1 Method and Apparatus for Correcting Multi-Modality Imaging Data 有权
标题翻译：用于校正多模态成像数据的方法和装置
公开(公告)号：US20090238427A1
公开(公告)日：2009-09-24
申请号：US12053370
申请日：2008-03-21
申请人： Jiang Hsieh , James George Colsher , Albert Henry Lonn , Alexander Ganin , Jean-Baptiste Thibault
发明人： Jiang Hsieh , James George Colsher , Albert Henry Lonn , Alexander Ganin , Jean-Baptiste Thibault
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/037 , A61B6/5235
摘要： A method for correcting Positron Emission Tomography (PET) data includes adjusting a tube current generated by the CT imaging system to a second tube current value that is less than a first tube current value used to generate diagnostic quality CT images, and imaging the patient with the CT imaging system set at the second tube current value. The method also includes generating a plurality of computed tomography (CT) projection data from the CT imaging system and preprocessing the CT projection data to generate preprocessed CT projection data. The method further includes filtering the preprocessed CT projection data to reduce electronic noise to generate filtered CT projection data, and performing a minus logarithmic operation on the filtered CT projection data to generate the corrected PET data.
摘要翻译：用于校正正电子发射断层摄影（PET）数据的方法包括将由CT成像系统产生的管电流调节到小于用于产生诊断质量CT图像的第一管电流值的第二管电流值，以及使患者成像 CT成像系统设置在第二管电流值。该方法还包括从CT成像系统生成多个计算机断层摄影（CT）投影数据，并预处理CT投影数据以产生预处理的CT投影数据。该方法还包括对预处理的CT投影数据进行滤波以减少电子噪声以产生经滤波的CT投影数据，以及对经滤波的CT投影数据执行负对数运算以产生经校正的PET数据。

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