Two-dimensional photon counting position encoder system and process
    21.
    发明授权
    Two-dimensional photon counting position encoder system and process 失效
    二维光子计数位置编码器系统及过程

    公开(公告)号:US4749863A

    公开(公告)日:1988-06-07

    申请号:US796073

    申请日:1985-11-07

    CPC分类号: G01T1/202 G01T1/2985

    摘要: A two-dimensional photon position encoder system (10) and process which includes a detector (20) for enhancing the spatial resolution of the situs of the origin of incident photons of gamma rays. A plurality of scintillator material members (22) interact with the incident photons and produce a quantifiable number of photons which exit the scintillation material members. A tuned light guide (68) having a plurality of radiation barriers (92) of predetermined lengths define slots which are operatively associated with one of the scintillator material members. These slots (90) serve to enhance the predictability of the statistical distribution of photons along the length of the slotted light guide (68). A detector (20) detects the distribution of the photons at preselected locations along the length of the slotted light guide. In one embodiment, this detector (20) comprises a photomultiplier (70) which gathers information concerning the photoelectrons which are then counted. The statistical distribution of these photoelectrons is processed by an improved pattern recognition technique such that the positioning information can be determined.

    摘要翻译: 一种二维光子位置编码器系统(10)以及包括用于增强伽马射线入射光子原点的位置的空间分辨率的检测器(20)的处理。 多个闪烁体材料构件(22)与入射的光子相互作用并产生可从数量上闪烁的材料构件的数量的光子。 具有多个具有预定长度的辐射屏障(92)的调谐光导(68)限定与闪烁体材料构件之一可操作地相关的槽。 这些槽(90)用于增强沿着带槽光导(68)的长度的光子的统计分布的可预测性。 检测器(20)沿着狭缝光导的长度检测预选位置处的光子的分布。 在一个实施例中,该检测器(20)包括光电倍增器(70),其收集关于光电子的信息,然后对其进行计数。 这些光电子的统计分布通过改进的模式识别技术来处理,使得可以确定定位信息。

    Normalization Coefficients in PET Continuous Bed Motion Acquisition
    22.
    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。

    Integrated Digital Discriminator For a Silicon Photomultiplier
    23.
    发明申请
    Integrated Digital Discriminator For a Silicon Photomultiplier 有权
    硅光电倍增管的集成数字鉴相器

    公开(公告)号:US20140029715A1

    公开(公告)日:2014-01-30

    申请号:US13556331

    申请日:2012-07-24

    IPC分类号: G06M15/00 H01J40/00

    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。

    Systems and Methods for Calibrating Time Alignment For A Positron Emission Tomography (PET) System
    24.
    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

    Prompt gamma correction for non-standard isotopes in a PET scanner
    25.
    发明授权
    Prompt gamma correction for non-standard isotopes in a PET scanner 有权
    PET扫描仪中非标准同位素的伽马校正

    公开(公告)号:US07894652B2

    公开(公告)日:2011-02-22

    申请号:US12110474

    申请日:2008-04-28

    IPC分类号: G06K9/00 G01R23/02 G01N23/00

    CPC分类号: G01T1/2985 A61B6/037

    摘要: A method for correcting PET emission data for prompt gamma emission background components present in non-pure positron-emitting isotopes uses a two component fit of modeled scatter and modeled prompt gamma emission in the area of scatter tails in a normalized emission sinogram. The method allows a PET scan using non-standard PET isotopes to be quantitative and thus more clinically useful.

    摘要翻译: 用于校正存在于非纯正电子发射同位素中的迅速γ发射背景分量的PET发射数据的方法使用归一化发射正弦图中散射尾部区域中的建模散射和建模的提示γ发射的双分量拟合。 该方法允许使用非标准PET同位素的PET扫描是定量的,因此在临床上更有用。

    Methods of performing PET sinogram quality check
    26.
    发明授权
    Methods of performing PET sinogram quality check 有权
    执行PET正弦图质量检查的方法

    公开(公告)号:US07858943B2

    公开(公告)日:2010-12-28

    申请号:US12204180

    申请日:2008-09-04

    IPC分类号: G01D18/00

    CPC分类号: G01T1/169 G01T1/1648

    摘要: A method for determining quality of sinograms produced by a medical imaging device. The method may include placing a uniform phantom object in the field of view of the medical imaging device; acquiring one or more phantom sinograms of the uniform phantom object; establish a set of parameters for the acquired one or more phantom sinograms; and determine, based on pre-set ranges of the parameters, the quality of sinograms produced by the medical imaging device. The parameters may be one or more parameters of a group of parameters consisting of block uniformity, block efficiency, randoms rate, scanner efficiency, and scatter ratio.

    摘要翻译: 一种用于确定由医学成像装置产生的正弦图的质量的方法。 该方法可以包括在医疗成像设备的视野中放置均匀的体模对象; 获取统一幻影物体的一个或多个幻像正弦图; 为所获得的一个或多个幻像正弦图建立一组参数; 并且基于参数的预设范围来确定由医学成像装置产生的正弦图的质量。 参数可以是由块均匀性,块效率,随机速率,扫描器效率和散射比组成的一组参数的一个或多个参数。

    Method for Improving Clinical Data Quality In Positron Emission Tomography
    27.
    发明申请
    Method for Improving Clinical Data Quality In Positron Emission Tomography 失效
    在正电子发射断层扫描中改善临床数据质量的方法

    公开(公告)号:US20100148047A1

    公开(公告)日:2010-06-17

    申请号:US12622623

    申请日:2009-11-20

    IPC分类号: G01T1/161 G12B13/00

    CPC分类号: G01T1/2985 G01T7/005

    摘要: A method for improving clinical data quality in Positron Emission Tomography (PET). The method provides for the processing of PET data to accurately and efficiently determine a data single-to-noise ratio (SNR) corresponding to each individual clinical patient scan, as a function of a singles rate in a PET scanner. The method relates an injected dose to the singles rate to determine SNR(Dinj), and provides an accurate estimate of a quantity proportional to SNR, similar in function to the SNR(Dinj). Knowledge of SNR(Dinj) permits determination of peak SNR, optimal dose, SNR deficit, dose deficit, and differential dose benefit. The patient dose is fractionated, with a small calibration dose given initially. After a short uptake, the patient is pre-scanned to determine T, S, and R. An optimal does is then determined and the remainder injected.

    摘要翻译: 一种改善正电子发射断层扫描(PET)临床数据质量的方法。 该方法提供PET数据的处理,以准确且有效地确定与每个单独的临床患者扫描相对应的数据单一噪声比(SNR),作为PET扫描仪中单打率的函数。 该方法将注射剂量与单次速率相关联以确定SNR(Dinj),并且提供与SNR成比例的量的精确估计,其功能类似于SNR(Dinj)。 SNR(Dinj)的知识允许确定峰值SNR,最佳剂量,SNR赤字,剂量缺陷和差异剂量效益。 对患者剂量进行分级,最初给予较小的校准剂量。 经过短暂摄取后,患者被预先扫描以确定T,S和R.然后确定最佳确定并且剩余部分注射。

    Method for improving clinical data quality in positron emission tomography
    29.
    发明授权
    Method for improving clinical data quality in positron emission tomography 失效
    正电子发射断层扫描技术提高临床资料质量的方法

    公开(公告)号:US07649176B2

    公开(公告)日:2010-01-19

    申请号:US10987598

    申请日:2004-11-12

    IPC分类号: G01T1/164

    CPC分类号: G01T1/2985 G01T7/005

    摘要: A method for improving clinical data quality in Positron Emission Tomography (PET). The method provides for the processing of PET data to accurately and efficiently determine a data signal-to-noise ratio (SNR) corresponding to each individual clinical patient scan, as a function of a singles rate in a PET scanner. The method relates an injected dose to the singles rate to determine SNR(Dinj), and provides an accurate estimate of a quantity proportional to SNR, similar in function to the SNR(Dinj). Knowledge of SNR(Dinj) permits determination of peak SNR, optimal dose, SNR deficit, dose deficit, and differential dose benefit. The patient dose is fractionated, with a small calibration dose given initially. After a short uptake, the patient is pre-scanned to determine T, S, and R. An optimal dose is then determined and the remainder injected.

    摘要翻译: 一种改善正电子发射断层扫描(PET)临床数据质量的方法。 该方法提供了PET数据的处理,以便根据PET扫描仪中的单打率来准确和有效地确定对应于每个单独的临床患者扫描的数据信噪比(SNR)。 该方法将注射剂量与单次速率相关联以确定SNR(Dinj),并且提供与SNR成比例的量的精确估计,其功能类似于SNR(Dinj)。 SNR(Dinj)的知识允许确定峰值SNR,最佳剂量,SNR赤字,剂量缺陷和差异剂量效益。 对患者剂量进行分级,最初给予较小的校准剂量。 在短时间摄取后,患者被预先扫描以确定T,S和R.然后确定最佳剂量,并注射剩余量。

    Scintillation detector array for encoding the energy, position, and time coordinates of gamma ray interactions
    30.
    发明授权
    Scintillation detector array for encoding the energy, position, and time coordinates of gamma ray interactions 有权
    闪烁探测器阵列,用于编码伽马射线相互作用的能量,位置和时间坐标

    公开(公告)号:US06362479B1

    公开(公告)日:2002-03-26

    申请号:US09272228

    申请日:1999-03-18

    IPC分类号: G01T120

    摘要: A scintillation detector which includes a plurality of discrete scintillators composed of one or more scintillator materials. The discrete scintillators interact with incident radiation to produce a quantifiable number of photons with characteristic emission wavelength and decay time. A light guide is operatively associated with the scintillation crystals and may be either active or non-active and segmented or non-segmented depending upon the embodiment of the design. Photodetectors are provided to sense and quantify the scintillation light emissions. The process and system embodying various features of the present invention can be utilized in various applications such as SPECT, PET imaging and simultaneous PET systems. In accordance with the present invention, the detector array of the present invention incorporates either a single scintillator layer of discrete scintillators or discrete scintillators composed of two stacked different layers that can be the same scintillator material or of two different scintillator materials. In either case the different layers are composed of materials that have distinctly different decay times. The variants in these figures are the types of optical detectors which are used, i.e. photomultipliers and/or photodiodes, whether or not a segmented optical light guide is used, and whether the light guide is active or non-active. If a segmented optical light guide is used then the variant is whether the configuration is inverted or non-inverted.

    摘要翻译: 闪烁检测器,其包括由一个或多个闪烁体材料组成的多个分立的闪烁体。 离散的闪烁体与入射辐射相互作用以产生具有特征发射波长和衰减时间的可量化数量的光子。 光引导件与闪烁晶体可操作地相关联,并且可以是有源的或非有效的,并且根据设计的实施例是分段的或非分段的。 提供光电检测器来感测和量化闪烁光发射。 体现本发明各种特征的方法和系统可以用于诸如SPECT,PET成像和同时PET系统的各种应用中。 根据本发明,本发明的检测器阵列包括单个闪烁体层的离散闪烁体或由两层不同层组成的分立闪烁体,其可以是相同的闪烁体材料或两种不同的闪烁体材料。 在任一情况下,不同的层由具有截然不同的衰变时间的材料组成。 这些图中的变型是使用的光学检测器的类型,即光电倍增管和/或光电二极管,是否使用分段的光学光导,以及光导是活动的还是非活动的。 如果使用分段光学光导,则该变体是配置是倒置还是非反转。