专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06963065B2 Normalization apparatus for panel detector PET scanners 失效
标题翻译：面板检测仪PET扫描仪的归一化装置
公开(公告)号：US06963065B2
公开(公告)日：2005-11-08
申请号：US10418520
申请日：2003-04-18
申请人： Maurizio Conti , James J. Hamill , Michael E. Casey , Mu Chen
发明人： Maurizio Conti , James J. Hamill , Michael E. Casey , Mu Chen
IPC分类号： G01D18/00 , G01T1/172 , G01T1/29 , G12B13/00
CPC分类号： G01T1/2985 , A61B6/037
摘要： A normalization apparatus and method for a PET scanner with panel detectors for obtaining an estimate of a normalization array, for correction for count rate effects on the normalization array, and for measurement of the relation between the normalization array and the count rate. The method of the present invention is based on two quasi-independent radial and axial components, which are count rate dependent due to sensitivity changes across the detector blocks. A scatter source is disposed at the center of the FOV and a scatter-free source is disposed at the outer edge of the FOV. The method computes the normalization array through several steps which evaluate the geometric profile, the axial profile, and the correction factor. A count rate correction is introduced to extend the normalization array to any count rate.
摘要翻译：一种具有面板检测器的PET扫描仪的归一化装置和方法，用于获得归一化阵列的估计，用于校正对归一化阵列的计数率影响，以及用于测量归一化阵列与计数率之间的关系。本发明的方法是基于两个准独立的径向和轴向分量，其由于检测器块两端的灵敏度变化而依次计数。散射源设置在FOV的中心，并且不分散源设置在FOV的外边缘处。该方法通过评估几何轮廓，轴向轮廓和校正因子的几个步骤来计算归一化阵列。引入计数率校正以将归一化数组扩展到任何计数率。

2. 发明申请

US20090076379A1 Ultrasonic Imager for Motion Measurement in Multi-Modality Emission Imaging 有权
标题翻译：超声波成像仪用于多模式发射成像中的运动测量
公开(公告)号：US20090076379A1
公开(公告)日：2009-03-19
申请号：US12125329
申请日：2008-05-22
申请人： James J. Hamill , Gunther Platsch , Michael E. Casey
发明人： James J. Hamill , Gunther Platsch , Michael E. Casey
IPC分类号： A61B8/14 , A61B5/05
CPC分类号： A61B8/08 , A61B5/7285 , A61B6/032 , A61B6/5247 , A61B6/541 , A61B8/4245 , A61B8/5238 , A61B8/543 , G01T1/1603
摘要： A medical imaging device has an emission tomograph, at least one ultrasonic (US) probe for providing images giving real-time information about the location of the internal organs of a subject, a tracking system for spatially locating the at least one ultrasonic probe in relation to the medical imaging device, and an image processing unit in which the location information obtained by the ultrasonic probe is used for attenuation correction of image information obtained by the emission tomograph.
摘要翻译：一种医疗成像装置具有发射断层摄影机，至少一个超声波（US）探头，用于提供给出关于被检体的内部器官的位置的实时信息的图像，用于相对于空间定位至少一个超声波探头的跟踪系统以及图像处理单元，其中由超声波探头获得的位置信息用于由发射断层摄影机获得的图像信息的衰减校正。

3. 发明授权

US08565856B2 Ultrasonic imager for motion measurement in multi-modality emission imaging 有权
标题翻译：超声波成像仪用于多模式发射成像中的运动测量
公开(公告)号：US08565856B2
公开(公告)日：2013-10-22
申请号：US12125329
申请日：2008-05-22
申请人： James J. Hamill , Günther Platsch , Michael E. Casey
发明人： James J. Hamill , Günther Platsch , Michael E. Casey
IPC分类号： A61B5/05
CPC分类号： A61B8/08 , A61B5/7285 , A61B6/032 , A61B6/5247 , A61B6/541 , A61B8/4245 , A61B8/5238 , A61B8/543 , G01T1/1603
摘要： A medical imaging device has an emission tomograph, at least one ultrasonic (US) probe for providing images giving real-time information about the location of the internal organs of a subject, a tracking system for spatially locating the at least one ultrasonic probe in relation to the medical imaging device, and an image processing unit in which the location information obtained by the ultrasonic probe is used for attenuation correction of image information obtained by the emission tomograph.
摘要翻译：一种医疗成像装置具有发射断层摄影机，至少一个超声波（US）探头，用于提供给出关于被检体的内部器官的位置的实时信息的图像，用于相对于空间定位至少一个超声波探头的跟踪系统以及图像处理单元，其中由超声波探头获得的位置信息用于由发射断层摄影机获得的图像信息的衰减校正。

4. 发明授权

US06429434B1 Transmission attenuation correction method for PET and SPECT 失效
标题翻译： PET和SPECT传输衰减校正方法
公开(公告)号：US06429434B1
公开(公告)日：2002-08-06
申请号：US09398497
申请日：1999-09-17
申请人： Charles C. Watson , Stephen D. Miller , Ronald Nutt , Michael E. Casey , James J. Hamill
发明人： Charles C. Watson , Stephen D. Miller , Ronald Nutt , Michael E. Casey , James J. Hamill
IPC分类号： G01T1166
CPC分类号： G01T1/2985 , A61B6/037 , G01T1/1648 , G21K1/02
摘要： A transmission source serves to detect activity from a radiation source for correcting attenuation in either PET mode or SPECT mode. The transmission source includes a detector dedicated to collecting attenuation data in PET mode. A collimated radiation source and a detector are positioned with respect to a tomography device such that only a selected strip of the imaging detector of the tomograph is illuminated such that events unrelated to the attenuation are eliminated. The transmission source can either be a coincidence transmission source or a singles transmission source and includes a collimator in which is disposed a radiation source. An opening is defined by the collimator for exposing a selected portion of the imaging detectors of the tomograph device. Positioned behind the radiation source, relative to the imaging detectors, is the dedicated attenuation detector. In a dual head tomograph device, one transmission source of the present invention is disposed opposite each bank of imaging detectors. The sources and the associated collimators are positioned to the side of each head at a slight angle relative to the respective head. The sources and detectors are fixed relative to the imaging heads. In order to obtain full coverage of the field of view (FOV) in the same manner as for an emission scan, the heads and sources are rotated about the center of the camera. In SPECT mode, the point source is selected to have sufficiently high energy to shine through the patient and the collimators associated with the imaging detector.
摘要翻译：传输源用于检测来自辐射源的活动以校正PET模式或SPECT模式中的衰减。传输源包括专用于在PET模式下收集衰减数据的检测器。准直辐射源和检测器相对于断层摄影装置定位，使得只有层析成像仪的成像检测器的选定条带被照亮，从而消除与衰减无关的事件。传输源可以是重合传输源或单个传输源，并且包括准直仪，其中设置有辐射源。由准直器限定开口以暴露层析成像装置的成像检测器的选定部分。相对于成像检测器定位在辐射源之后，是专用的衰减检测器。在双头断层摄影装置中，本发明的一个发射源与每一组成像检测器相对设置。源和相关联的准直仪相对于相应的头部以相当小的角度定位在每个头部的侧面。源和检测器相对于成像头是固定的。为了以与发射扫描相同的方式获得视场（FOV）的全面覆盖，头部和源围绕照相机的中心旋转。在SPECT模式中，点源被选择为具有足够高的能量以照射通过患者和与成像检测器相关联的准直仪。

5. 发明授权

US07465927B2 Attenuation correction for nuclear medical imaging scanners with simultaneous transmission and emission acquisition 失效
标题翻译：具有同时传输和发射采集的核医学成像扫描仪的衰减校正
公开(公告)号：US07465927B2
公开(公告)日：2008-12-16
申请号：US11387263
申请日：2006-03-23
申请人： Vladimir Panin , Maurizio Conti , Michael E. Casey
发明人： Vladimir Panin , Maurizio Conti , Michael E. Casey
IPC分类号： G01T1/164
CPC分类号： G01T1/1617
摘要： For patient transmission data acquired simultaneously with patient emission data, blank transmission data are acquired in the absence of the patient emission and therefore under count rate conditions different from the count rate conditions of the patient transmission data. To prevent the different count rate conditions from causing artifacts in reconstructed tomographic images, a correction is made for spatially varying count rate effects on the attenuation correction. For example, the blank scan data are adjusted according to the count rate at which the patient emission data are acquired, and the adjusted blank scan data and the patient transmission data are used for attenuation correction of the patient emission data used for reconstructing a tomographic image.
摘要翻译：对于与患者发射数据同时获得的患者传输数据，在不存在患者发射的情况下获取空白传输数据，因此在与患者传输数据的计数速率条件不同的计数速率条件下获取。为了防止不同的计数率条件在重建的断层图像中造成伪像，对空间变化的计数率对衰减校正的影响进行了校正。例如，根据获取患者发射数据的计数率来调整空白扫描数据，并且将经调整的空白扫描数据和患者传输数据用于用于重建断层图像的患者排放数据的衰减校正。

6. 发明授权

US06774358B2 Normalization apparatus for PET and SPECT scanners and method for using same 失效
标题翻译： PET和SPECT扫描仪的归一化装置及其使用方法
公开(公告)号：US06774358B2
公开(公告)日：2004-08-10
申请号：US10103276
申请日：2002-03-21
申请人： James J. Hamill , Michael E. Casey , Timothy G. Gremillion , Wing K. Luk , Stephen Miller
发明人： James J. Hamill , Michael E. Casey , Timothy G. Gremillion , Wing K. Luk , Stephen Miller
IPC分类号： G01K500
CPC分类号： G01T1/2985 , A61B6/037 , G01T1/1644
摘要： Apparatus and methods for simulating a sheet source with a line source for determining normalization coefficients for the detectors in positron emission tomography (PET) scanners and single photon emission computed tomography (SPECT) scanners. A line source, oriented perpendicular to the axis of a scanner gantry, is moved along the axis while the detectors are stationary and positioned substantially parallel to the plane in which the source moves. In another embodiment, an axially mounted line source moves parallel to a diameter of the gantry while the stationary detectors are positioned substantially parallel to the plane in which the source moves. In still another embodiment, the line source is stationary and positioned parallel to the gantry axis and off center while the detectors move relative to the line source. A shaped attenuator is placed around the source in this last embodiment.
摘要翻译：用于模拟具有用于确定正电子发射断层摄影（PET）扫描仪和单光子发射计算机断层摄影（SPECT）扫描仪中的检测器的归一化系数的线源的片材源的装置和方法。垂直于扫描仪台架的轴线定向的线源沿轴线移动，同时检测器是固定的并且基本上平行于源移动的平面定位。在另一个实施例中，轴向安装的线源平行于台架的直径移动，而固定检测器基本上平行于源移动的平面定位。在另一个实施例中，线源固定并且平行于台架轴定位并且离开中心，同时检测器相对于线源移动。在最后一个实施例中，围绕源设置成形的衰减器。

7. 发明申请

US20080267477A1 Iterative Image Processing 失效
标题翻译：迭代图像处理
公开(公告)号：US20080267477A1
公开(公告)日：2008-10-30
申请号：US11771197
申请日：2007-06-29
申请人： Maurizio Conti , Michael E. Casey
发明人： Maurizio Conti , Michael E. Casey
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method for processing an image which has the steps of a) receiving acquired data necessary to obtain an image and estimating a preliminary image; b) selecting at least one image element within the image; c) performing an iterative algorithm for processing the image at least on the at least one image element; d) computing a difference between the processed at least one image element and the at least one image element; and e) repeating the steps c) and d) until the difference is below a predefined threshold.
摘要翻译：一种用于处理图像的方法，该方法具有以下步骤：a）接收获取图像所需的获得的数据并估计初步图像; b）选择图像内的至少一个图像元素; c）执行至少在所述至少一个图像元素处理所述图像的迭代算法; d）计算所处理的至少一个图像元素与所述至少一个图像元素之间的差异; 和e）重复步骤c）和d），直到该差值低于预定阈值。

8. 发明授权

US07949172B2 Iterative image processing 失效
标题翻译：迭代图像处理
公开(公告)号：US07949172B2
公开(公告)日：2011-05-24
申请号：US11771197
申请日：2007-06-29
申请人： Maurizio Conti , Michael E. Casey
发明人： Maurizio Conti , Michael E. Casey
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method for processing an image which has the steps of a) receiving acquired data necessary to obtain an image and estimating a preliminary image; b) selecting at least one image element within the image; c) performing an iterative algorithm for processing the image at least on the at least one image element; d) computing a difference between the processed at least one image element and the at least one image element; and e) repeating the steps c) and d) until the difference is below a predefined threshold.
摘要翻译：一种用于处理图像的方法，该方法具有以下步骤：a）接收获取图像所需的获得的数据并估计初步图像; b）选择图像内的至少一个图像元素; c）执行至少在所述至少一个图像元素处理所述图像的迭代算法; d）计算所处理的至少一个图像元素与所述至少一个图像元素之间的差异; 和e）重复步骤c）和d），直到该差值低于预定阈值。

9. 发明授权

US07417231B2 Fourier re-binning of time-of-flight positron emission tomography data 有权
标题翻译：飞行时间正电子发射断层扫描数据的傅里叶重新分组
公开(公告)号：US07417231B2
公开(公告)日：2008-08-26
申请号：US11316590
申请日：2005-12-22
申请人： Michel Defrise , Michael E. Casey , Christian J. Michel , Maurizio Conti
发明人： Michel Defrise , Michael E. Casey , Christian J. Michel , Maurizio Conti
IPC分类号： G01T1/166
CPC分类号： G01T1/2985 , A61B6/037
摘要： Fast reconstruction methods are provided for 3D time-of-flight (TOF) positron emission tomography (PET), based on 2D data re-binning. Starting from pre-corrected 3D TOF data, a re-binning algorithm estimates for each transaxial slice the 2D TOF sinogram. The re-binned sinograms can then be reconstructed using any algorithm for 2D TOF reconstruction. A TOF-FORE (Fourier re-binning of TOF data) algorithm is provided as an approximate re-binning algorithm obtained by extending the Fourier re-binning method for non-TOF data. In addition, two partial differential equations are identified that must be satisfied by consistent 3D TOF data, and are used to derive exact re-binning algorithms and to characterize the degree of the approximation in TOF-FORE. Numerical simulations demonstrate that TOF-FORE is more accurate than two different TOF extensions of the single-slice re-binning method, and suggest that TOF-FORE will be a valuable tool for practical TOF PET in the range of axial apertures and time resolutions typical of current scanners.
摘要翻译：基于2D数据重新分组，为3D飞行时间（TOF）正电子发射断层扫描（PET）提供了快速重建方法。从预校正的3D TOF数据开始，对于每个横轴切片2D TOF正弦图进行重新分类算法。然后可以使用用于2D TOF重建的任何算法来重构重新合并的正弦图。提供TOF-FORE（TOF数据的傅里叶重新分组）算法作为通过扩展用于非TOF数据的傅里叶重新分组方法而获得的近似再分类算法。此外，识别出必须通过一致的3D TOF数据来满足两个偏微分方程，并且用于导出精确的重新分组算法并且表征TOF-FORE中的近似程度。数值模拟表明，TOF-FORE比单片重新合并方法的两种不同的TOF扩展更为准确，并且表明TOF-FORE将成为实际TOF PET在轴向孔径和时间分辨率范围内的有价值的工具的当前扫描仪。

10. 发明申请

US20090072131A1 Estimation of Crystal Efficiency With Axially Compressed Sinogram 有权
公开(公告)号：US20090072131A1
公开(公告)日：2009-03-19
申请号：US12212457
申请日：2008-09-17
申请人： Mu Chen , Vladimir Panin , Michael E. Casey
发明人： Mu Chen , Vladimir Panin , Michael E. Casey
IPC分类号： G01D18/00
CPC分类号： G01T1/2985 , A61B6/037 , G01T7/005
摘要： The present invention provides a method for estimating crystal efficiency in a PET detector that takes axial compression into account. It does so via an iterative methodology in which a μ-map is first generated and then is used to obtain a solution for the equation L  ( ɛ i ) = ∑ n ∈ N   y n  log  ∑ i , j ∈ span   g ij  ɛ i  ɛ j  x ij - ∑ i , j ∈ span   g ij  ɛ i  ɛ j  x ij , wherein gij is a geometric factor for LOR(i,j), εi and εj are the efficiencies for crystal i and crystal j, and xij is the line integral of the source distribution along LOR(i,j). Once efficiencies are determined, they are used to calibrate the PET detector.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式