Normalization Coefficients in PET Continuous Bed Motion Acquisition
    1.
    发明申请
    Normalization Coefficients in PET Continuous Bed Motion Acquisition 有权
    PET连续床运动获取中的归一化系数

    公开(公告)号:US20140200848A1

    公开(公告)日:2014-07-17

    申请号:US13739458

    申请日:2013-01-11

    IPC分类号: G06F17/18

    CPC分类号: G01T1/2985 A61B6/037

    摘要: Normalization coefficients in are computed for positron emission tomography (PET) continuous bed motion acquisition (CBM). The normalization coefficients for the lines-of-response in CBM account for the change in decay of the injected isotope over time and/or changes in velocity of the bed motion.

    摘要翻译: 计算正电子发射断层扫描(PET)连续床运动获取(CBM)的归一化系数。 CBM中响应线的归一化系数表示随着时间的推移,注入同位素的衰变变化和/或床运动速度的变化。

    Systems and Methods for Calibrating Time Alignment For A Positron Emission Tomography (PET) System
    2.
    发明申请
    Systems and Methods for Calibrating Time Alignment For A Positron Emission Tomography (PET) System 有权
    用于校正正电子发射断层扫描(PET)系统的时间对准的系统和方法

    公开(公告)号:US20110127413A1

    公开(公告)日:2011-06-02

    申请号:US12628259

    申请日:2009-12-01

    IPC分类号: G12B13/00

    CPC分类号: G12B13/00 G01T1/2985

    摘要: A representative positron emission tomography (PET) calibration system includes a PET scanner having a ring detector, a phantom that is placed at approximately the center of the ring detector, and a time alignment calibration manager that is coupled to the PET scanner. The time alignment calibration manager detects coincidence events from the phantom, calculates position of time of flight events from the ring detector based on the detected coincidence events, and calculates time offsets for the ring detector using a mean value calculation based on the calculated position of the time of flight events.

    摘要翻译: 代表性的正电子发射断层摄影(PET)校准系统包括具有环检测器的PET扫描器,放置在环检测器的大约中心处的体模,以及耦合到PET扫描器的时间对准校准管理器。 时间校准管理器检测来自幻影的重合事件,基于检测到的重合事件来计算来自环形探测器的飞行时间的位置,并使用基于计算出的位置的计算的平均值计算环形探测器的时间偏移量 飞行时间事件

    Simultaneous Reconstruction of Emission Activity and Attenuation Coefficient Distribution from TOF Data, Acquired with External Shell Source
    3.
    发明申请
    Simultaneous Reconstruction of Emission Activity and Attenuation Coefficient Distribution from TOF Data, Acquired with External Shell Source 有权
    TOF数据同时重建排放活动和衰减系数分布,获得外壳来源

    公开(公告)号:US20130028496A1

    公开(公告)日:2013-01-31

    申请号:US13555308

    申请日:2012-07-23

    IPC分类号: G06K9/36

    摘要: Methods, and systems therefrom, for generating images from time of flight (TOF) data associated with a scan of at least one object using a positron emission tomography system are provided. The method includes providing initial values for an activity image to yield a current activity image. The method also includes estimating initial values for an attenuation map (μ-map) image based on the TOF data to yield a current μ-map image. The method further includes repeating, until at least one termination condition is met, the steps of updating the current activity image based on at least the current μ-map and a first update algorithm and updating the current μ-map image based on at least on the updated activity image and a second update algorithm. The method also includes outputting an image of the at least one object based on the current μ-map and the current activity image.

    摘要翻译: 提供了用于使用正电子发射断层摄影系统从与至少一个物体的扫描有关的飞行时间(TOF)数据生成图像的方法和系统。 该方法包括提供活动图像的初始值以产生当前活动图像。 该方法还包括基于TOF数据估计衰减映射(μ映射)图像的初始值以产生当前的μ映射图像。 该方法还包括重复直到至少一个终止条件被满足为基于至少基于当前μ映射和第一更新算法来更新当前活动图像的步骤,并且至少基于上述步骤更新当前的μ映射图像 更新的活动图像和第二更新算法。 该方法还包括基于当前μ图和当前活动图像输出至少一个对象的图像。

    Systems and methods for calibrating time alignment for a positron emission tomography (PET) system
    4.
    发明授权
    Systems and methods for calibrating time alignment for a positron emission tomography (PET) system 有权
    用于校正正电子发射断层摄影(PET)系统的时间对准的系统和方法

    公开(公告)号:US08089043B2

    公开(公告)日:2012-01-03

    申请号:US12628259

    申请日:2009-12-01

    IPC分类号: G01D18/00

    CPC分类号: G12B13/00 G01T1/2985

    摘要: A representative positron emission tomography (PET) calibration system includes a PET scanner having a ring detector, a phantom that is placed at approximately the center of the ring detector, and a time alignment calibration manager that is coupled to the PET scanner. The time alignment calibration manager detects coincidence events from the phantom, calculates position of time of flight events from the ring detector based on the detected coincidence events, and calculates time offsets for the ring detector using a mean value calculation based on the calculated position of the time of flight events.

    摘要翻译: 代表性的正电子发射断层摄影(PET)校准系统包括具有环检测器的PET扫描器,放置在环检测器的大约中心处的体模,以及耦合到PET扫描器的时间对准校准管理器。 时间校准管理器检测来自幻影的重合事件,基于检测到的重合事件来计算来自环形探测器的飞行时间的位置,并使用基于计算出的位置的计算的平均值计算环形探测器的时间偏移量 飞行时间事件

    Simultaneous reconstruction of emission activity and attenuation coefficient distribution from TOF data, acquired with external shell source
    5.
    发明授权
    Simultaneous reconstruction of emission activity and attenuation coefficient distribution from TOF data, acquired with external shell source 有权
    从TOF数据同时重建排放活动和衰减系数分布,采用外壳来源采集

    公开(公告)号:US08913810B2

    公开(公告)日:2014-12-16

    申请号:US13555308

    申请日:2012-07-23

    IPC分类号: G06K9/00 G06T11/00

    摘要: Methods, and systems therefrom, for generating images from time of flight (TOF) data associated with a scan of at least one object using a positron emission tomography system are provided. The method includes providing initial values for an activity image to yield a current activity image. The method also includes estimating initial values for an attenuation map (μ-map) image based on the TOF data to yield a current μ-map image. The method further includes repeating, until at least one termination condition is met, the steps of updating the current activity image based on at least the current μ-map and a first update algorithm and updating the current μ-map image based on at least on the updated activity image and a second update algorithm. The method also includes outputting an image of the at least one object based on the current μ-map and the current activity image.

    摘要翻译: 提供了用于使用正电子发射断层摄影系统从与至少一个物体的扫描有关的飞行时间(TOF)数据生成图像的方法和系统。 该方法包括提供活动图像的初始值以产生当前活动图像。 该方法还包括基于TOF数据估计衰减映射(μ映射)图像的初始值以产生当前的μ映射图像。 该方法还包括重复直到至少一个终止条件被满足为基于至少基于当前μ映射和第一更新算法来更新当前活动图像的步骤,并且至少基于上述步骤更新当前的μ映射图像 更新的活动图像和第二更新算法。 该方法还包括基于当前μ图和当前活动图像输出至少一个对象的图像。

    Point spread function radial component implementation in Joseph's forward projector
    7.
    发明授权
    Point spread function radial component implementation in Joseph's forward projector 有权
    约瑟夫向前投影机的点扩散功能径向元件实现

    公开(公告)号:US08509504B2

    公开(公告)日:2013-08-13

    申请号:US12561139

    申请日:2009-09-16

    IPC分类号: G06K9/00 G06K9/62

    CPC分类号: G06T11/006 G06T2211/424

    摘要: Point spread function (PSF) radial filtering in a line of response space. Modeling a radial component, R, of a point spread filter as a function of at least a radial projection index ρ, a radial image space coordinate r, and an azimuth θ. The index ρ is characterized by an asymmetrical Gaussian distribution having where σleft(r) and σright(r) derived from point source measurements, and an adjustment σJ(r, θ) estimated from point source sinogram by Josephs' projector.

    摘要翻译: 点扩散函数(PSF)径向滤波在一行响应空间。 将点扩展滤波器的径向分量R作为至少径向投影指数rho,径向图像空间坐标r和方位角θ的函数建模。 索引rho的特征在于具有不对称高斯分布,其中从点源测量得到sigmaleft(r)和sigmaright(r),以及通过Josephs投影仪从点源正弦图估计的调节σJ(r,θ)。

    Point Spread Function Radial Component Implementation in Joseph's Forward Projector
    8.
    发明申请
    Point Spread Function Radial Component Implementation in Joseph's Forward Projector 有权
    约瑟夫前向投影仪中点扩散函数径向分量实现

    公开(公告)号:US20100067758A1

    公开(公告)日:2010-03-18

    申请号:US12561139

    申请日:2009-09-16

    IPC分类号: G06K9/00 G01N23/04

    CPC分类号: G06T11/006 G06T2211/424

    摘要: Point spread function (PSF) radial filtering in a line of response space. Modeling a radial component, R, of a point spread filter as a function of at least a radial projection index ρ, a radial image space coordinate r, and an azimuth θ. The index ρ is characterized by an asymmetrical Gaussian distribution having where σleft(r) and σright(r) derived from point source measurements, and an adjustment σJ(r, θ) estimated from point source sinogram by Josephs' projector.

    摘要翻译: 点扩散函数(PSF)径向滤波在一行响应空间。 将点扩展滤波器的径向分量R建模为至少径向投影指数&rgr;径向图像空间坐标r和方位角的函数。 指数 其特征在于具有不对称高斯分布,其具有来自点源测量的&sgr; left(r)和&sgr; right(r)以及通过Josephs投影仪从点源正弦图估计的调整&sgr; J(r,&thetas)。

    Integrated digital discriminator for a silicon photomultiplier
    9.
    发明授权
    Integrated digital discriminator for a silicon photomultiplier 有权
    用于硅光电倍增管的集成数字鉴别器

    公开(公告)号:US09217795B2

    公开(公告)日:2015-12-22

    申请号:US13556331

    申请日:2012-07-24

    IPC分类号: G01F15/06 G01T1/24

    摘要: Apparatuses and methods are provided that minimize the effects of dark-current pulses. For example, in one embodiment of the invention, a method is provided where a first pixel is struck (i.e., a primary pixel). Pixels struck within a fixed time frame after the primary pixel is struck are referred to as secondary pixels. After a short fixed time frame has expired, the number of primary and secondary pixels is added. If the count exceeds a threshold, the primary pixel was activated by the first (or early) photon from a true gamma event. If the threshold is not met then it is likely the primary pixel generated a dark pulse that should be ignored.

    摘要翻译: 提供了使暗电流脉冲的影响最小化的装置和方法。 例如,在本发明的一个实施例中,提供了一种方法,其中第一像素被撞击(即,主像素)。 在主要像素被击打之后的固定时间帧内撞击的像素被称为次要像素。 在短的固定时间段到期后,添加主要和次要像素的数量。 如果计数超过阈值,则主像素由来自真实伽马事件的第一(或早)光子激活。 如果阈值不满足,则主要像素可能产生应忽略的暗脉冲。