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。

    Integrated Digital Discriminator For a Silicon Photomultiplier
    2.
    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。

    Complementary PET reconstruction
    3.
    发明授权
    Complementary PET reconstruction 有权
    补充PET重建

    公开(公告)号:US08457381B2

    公开(公告)日:2013-06-04

    申请号:US13223527

    申请日:2011-09-01

    IPC分类号: G06K9/00

    CPC分类号: G06T11/006 G06T2211/412

    摘要: Using complementary reconstruction, images from short time frames may be generated for positron emission tomography. Detected events are gathered over a long period, such as three minutes. The detected events from a short period, such as one or two seconds, are removed. Reconstruction is performed on the detected events from the long period and another reconstruction is performed on the detected events from the long period without the detected events from the short period. The second reconstruction is subtracted from the first, providing data representing the short period. The data may result in better image quality than merely reconstructing an individual frame for the short period.

    摘要翻译: 使用互补重建,可以为正电子发射断层扫描生成来自短时间帧的图像。 检测到的事件是长时间收集的,例如三分钟。 从短时间(例如一秒或两秒)中检测到的事件将被删除。 对长时间的检测到的事件进行重建,并且对于长时间的检测到的事件进行另一重建,而没有从短周期检测到的事件。 从第一次减去第二个重建,提供表示短周期的数据。 数据可能会导致更好的图像质量,而不仅仅是在短时间内重建单个帧。

    Defining lost event talley tag packets when PET count rates exceed available acquisition bandwidth
    4.
    发明授权
    Defining lost event talley tag packets when PET count rates exceed available acquisition bandwidth 有权
    当PET计数率超过可用采集带宽时,定义丢失事件talley标签数据包

    公开(公告)号:US07983186B2

    公开(公告)日:2011-07-19

    申请号:US12558055

    申请日:2009-09-11

    IPC分类号: H04L12/26

    CPC分类号: G01T1/00 H04L67/12 H04L69/40

    摘要: A system identifies when received packets are lost at a node in a multi-node processing chain. The system processing chain may include a gantry interface module for receiving coincident event data from a PET (Positron Emission Tomography) detector array, a DMA (direct memory access) rebinner card, and a transmission line coupled between the gantry interface module and the DMA card. FPGA and FIFO elements in each processing portion receive packets that may be lost if there is insufficient FIFO capacity. Lost packets are marked, discarded, and counted. At specified intervals, set in accordance with a threshold number of packets received a lost tally data packet is generated that includes count information for lost packets. The lost tally data packet is forwarded downstream when sufficient storage capacity exists.

    摘要翻译: 系统识别在多节点处理链中的节点处收到的数据包丢失的情况。 系统处理链可以包括用于从PET(正电子发射断层扫描)检测器阵列,DMA(直接存储器访问)重新接收器卡和耦合在台架接口模块和DMA卡之间的传输线接收重合事件数据的龙门架接口模块 。 每个处理部分的FPGA和FIFO元素接收到如果FIFO容量不足可能会丢失的数据包。 丢失的数据包被标记,丢弃和计数。 按指定间隔设置,根据接收到的丢包数据包的阈值数量,生成包括丢失数据包的计数信息。 当存在足够的存储容量时,丢失的计数数据分组被转发到下游。

    Systems and Methods for Calibrating Time Alignment For A Positron Emission Tomography (PET) System
    5.
    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
    6.
    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
    7.
    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
    8.
    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
    10.
    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。