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19 条记录 (耗时 0.033 秒)

    Method and apparatus for timing calibration in a PET scanner
    4.
    发明申请
    Method and apparatus for timing calibration in a PET scanner 失效

    公开(公告)号：US20060102845A1

    公开(公告)日：2006-05-18

    申请号：US10986792

    申请日：2004-11-15

    申请人： John Williams ,  Charles Stearns ,  David McDaniel ,  Alexander Ganin

    发明人： John Williams ,  Charles Stearns ,  David McDaniel ,  Alexander Ganin

    IPC分类号： G01T1/164

    CPC分类号： G01T1/172 ,  G01T1/2985

    摘要： The invention is directed to a method and apparatus for timing calibration in a PET scanner. According to one embodiment, the invention relates to a method for timing calibration in a PET scanner having a plurality of scintillator blocks. The method comprises: detecting, in a first scintillator block, a first radiation event, wherein the first scintillator block time-stamps the first radiation event; detecting, in a second scintillator block that is adjacent to the first scintillator block, a second radiation event that corresponds to the first radiation event, wherein the second scintillator block time-stamps the second radiation event; and determining a timing characteristic of the first scintillator block with respect to the second scintillator block based on a comparison between the time-stamps of the first radiation event and the second radiation event.

    Method and system for reconstructing an image in a positron emission tomography (PET) system
    5.
    发明申请
    Method and system for reconstructing an image in a positron emission tomography (PET) system 有权
    用于在正电子发射断层摄影（PET）系统中重建图像的方法和系统

    公开(公告)号：US20060261275A1

    公开(公告)日：2006-11-23

    申请号：US11131149

    申请日：2005-05-17

    申请人： Charles Stearns ,  Ravindra Manjeshwar ,  Floribertus Philippus Heukensfeldt Jansen

    发明人： Charles Stearns ,  Ravindra Manjeshwar ,  Floribertus Philippus Heukensfeldt Jansen

    IPC分类号： G01T1/164

    CPC分类号： G01T1/2985

    摘要： A method and system for reconstructing an image in a time-of-flight (TOF) positron emission tomography (PET) system is provided. The method includes using a reconstructed image to determine predicted timing information. Timing bias data is updated based on received timing information associated with acquired scan data from a PET system and the predicted timing information. The method further includes reconstructing the image, based on the updated timing bias data.

    摘要翻译： 提供了一种用于在飞行时间（TOF）正电子发射断层摄影（PET）系统中重建图像的方法和系统。 该方法包括使用重构图像来确定预测的定时信息。 基于与来自PET系统的获取的扫描数据相关联的接收定时信息和预测的定时信息来更新定时偏差数据。 该方法还包括基于更新的定时偏差数据重建图像。

    Methods and systems for positron emission tomography data correction
    6.
    发明申请
    Methods and systems for positron emission tomography data correction 有权
    正电子发射断层扫描数据校正的方法和系统

    公开(公告)号：US20060081784A1

    公开(公告)日：2006-04-20

    申请号：US10969716

    申请日：2004-10-20

    申请人： Steven Ross ,  Charles Stearns ,  Ravindra Manjeshwar

    发明人： Steven Ross ,  Charles Stearns ,  Ravindra Manjeshwar

    IPC分类号： G01T1/164

    CPC分类号： G06T11/006 ,  G06T2211/424

    摘要： Methods and systems for image overlap correction are provided. The method includes acquiring the emission projection data from a plurality of scan frames that extend across at least a portion of a length of an object being imaged wherein elements of the object lie between a region of overlap between two successive frames. The method further includes iteratively reconstructing a 3D image volume from multi-frame emission projection data by updating an estimate of 3D image volume using emission projection data from the plurality of frames within an iterative reconstruction loop.

    摘要翻译： 提供了图像重叠校正的方法和系统。 该方法包括从多个扫描帧中获取发射投影数据，所述多个扫描帧延伸穿过被成像物体的长度的至少一部分，其中物体的元件位于两个连续帧之间的重叠区域之间。 该方法还包括通过使用来自迭代重建循环内的多个帧的发射投影数据更新3D图像体积的估计来从多帧发射投影数据中迭代重建3D图像体积。

    METHOD AND SYSTEM FOR IMAGING USING A FILTER FOR TIME-OF-FLIGHT PET
    7.
    发明申请
    METHOD AND SYSTEM FOR IMAGING USING A FILTER FOR TIME-OF-FLIGHT PET 失效
    使用过滤器进行成像的方法和系统

    公开(公告)号：US20060102846A1

    公开(公告)日：2006-05-18

    申请号：US10988878

    申请日：2004-11-15

    申请人： Ravindra Manjeshwar ,  Charles Stearns

    发明人： Ravindra Manjeshwar ,  Charles Stearns

    IPC分类号： G01T1/164

    CPC分类号： G06T11/005

    摘要： Methods and systems for imaging by using a filter for Time-Of-Flight Positron Emission Tomography (TOF PET) are described. The described methods of imaging a patient by using a positron emission tomography (PET) system includes acquiring a plurality of frames of sinogram data, filtering the acquired sinogram data and back-projecting the filtered sinogram data to form an output image of the patient. The acquired sinogram data defines a line of response (LOR) and a time-of-flight (TOF) measurement that localizes positron annihilation within the patient. The filtering of the acquired sinogram data is performed using the TOF measurement.

    摘要翻译： 描述了使用飞行时间正电子发射断层扫描（TOF PET）的滤波器进行成像的方法和系统。 所描述的通过使用正电子发射断层摄影（PET）系统对患者进行成像的方法包括获取正弦图数据的多个帧，对所获取的正弦图数据进行滤波，以及反投影过滤的正弦图数据以形成患者的输出图像。 获得的正中图数据定义了定位在患者体内的正电子湮灭的响应线（LOR）和飞行时间（TOF）测量。 使用TOF测量来执行所获取的正弦图数据的滤波。

    Technique for reconstructing PET scan images
    8.
    发明申请
    Technique for reconstructing PET scan images 有权
    PET扫描图像重建技术

    公开(公告)号：US20070040122A1

    公开(公告)日：2007-02-22

    申请号：US11205067

    申请日：2005-08-17

    申请人： Ravindra Manjeshwar ,  Floribertus Heukensfeldt Jansen ,  Charles Stearns

    发明人： Ravindra Manjeshwar ,  Floribertus Heukensfeldt Jansen ,  Charles Stearns

    IPC分类号： G01T1/164

    CPC分类号： G01T1/2985

    摘要： The invention is directed to a technique for reconstructing PET scan images. According to one embodiment, the invention relates to a method for reconstructing PET scan images. The method comprises: detecting a plurality of coincidence events in a PET scanner; storing data associated with the plurality of coincidence events in a chronological list based on a detection time for each of the plurality of coincidence events; generating correction data based on scatter coincidence events and random coincidence events in the plurality of coincidence events; and reconstructing one or more PET scan images based at least in part on the chronological list of data and the correction data.

    摘要翻译： 本发明涉及一种重建PET扫描图像的技术。 根据一个实施例，本发明涉及一种重建PET扫描图像的方法。 该方法包括：在PET扫描器中检测多个符合事件; 基于多个重合事件中的每一个的检测时间，将与所述多个重合事件相关联的数据存储在时序列表中; 基于所述多个重合事件中的分散符合事件和随机符合事件生成校正数据; 以及至少部分地基于时间顺序的数据列表和校正数据重建一个或多个PET扫描图像。

    Method and system for scattered coincidence estimation in a time-of-flight positron emission tomography system
    9.
    发明申请
    Method and system for scattered coincidence estimation in a time-of-flight positron emission tomography system 有权
    飞行时间正电子发射断层扫描系统中分散重合估计的方法和系统

    公开(公告)号：US20060163485A1

    公开(公告)日：2006-07-27

    申请号：US11040088

    申请日：2005-01-21

    申请人： Charles Stearns ,  Ravindra Manjeshwar

    发明人： Charles Stearns ,  Ravindra Manjeshwar

    IPC分类号： G01T1/164

    CPC分类号： G01T1/2985

    摘要： A method and system for controlling a positron emission tomography (PET) system is disclosed. The method includes acquiring image data and time-of-flight information from a PET system during an imaging scan. Further, the method includes performing scatter correction on the image data using the time-of-flight information.

    摘要翻译： 公开了一种用于控制正电子发射断层摄影（PET）系统的方法和系统。 该方法包括在成像扫描期间从PET系统获取图像数据和飞行时间信息。 此外，该方法包括使用飞行时间信息对图像数据执行散射校正。

    Systems and methods for analyzing an abnormality of an object
    10.
    发明申请
    Systems and methods for analyzing an abnormality of an object 有权
    用于分析物体异常的系统和方法

    公开(公告)号：US20050004452A1

    公开(公告)日：2005-01-06

    申请号：US10611296

    申请日：2003-07-01

    申请人： Sarah Hertel ,  Stanley Fox ,  Alexander Ganin ,  Charles Stearns

    发明人： Sarah Hertel ,  Stanley Fox ,  Alexander Ganin ,  Charles Stearns

    IPC分类号： G01T1/161 ,  A61B6/03 ,  G06T1/00 ,  G06T7/00 ,  A61B5/05

    CPC分类号： G06T7/0012 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  G06T7/30

    摘要： In one embodiment, a method for analyzing at least one abnormality of an object is described. The method includes obtaining a first image containing an abnormality using a first modality, obtaining a second image containing the abnormality using-a second modality, selecting a first region of interest located within the first image, determining an anatomical size of the abnormality based on the first region of interest in the first image, and determining a relative metabolic activity based on a second region of interest within the second image.

    摘要翻译： 在一个实施例中，描述了用于分析对象的至少一个异常的方法。 该方法包括使用第一模式获得包含异常的第一图像，使用第二模式获得包含异常的第二图像，选择位于第一图像内的第一感兴趣区域，基于该方法确定异常的解剖尺寸 第一图像中的第一感兴趣区域，以及基于第二图像内的第二感兴趣区域确定相对代谢活动。