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    SPECTRAL CALIBRATION OF SPECTRAL COMPUTED TOMOGRAPHY (CT)
    4.
    发明申请
    SPECTRAL CALIBRATION OF SPECTRAL COMPUTED TOMOGRAPHY (CT) 审中-公开
    光谱计算机断层显像（CT）的光谱校准

    公开(公告)号：WO2018057338A1

    公开(公告)日：2018-03-29

    申请号：PCT/US2017/051096

    申请日：2017-09-12

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： JIN, Yannan ,  FU, Geng ,  EDIC, Peter M. ,  GAO, Hewei

    IPC: A61B6/00 ,  H04N5/365 ,  G01T1/36 ,  G01V5/00

    Abstract: There is set forth herein a method including performing with an X-ray detector array of a CT imaging system one or more calibration scans, wherein the one or more calibration scans include obtaining for each element of the first through Nth elements of the X-ray detector array one or more calibration measurements; and updating a spectral response model for each element of the first through Nth elements using the one or more calibration measurements. In another aspect, a CT imaging system can perform imaging, e.g. including material decomposition (MD) imaging, using updated spectral response models for elements of an X-ray detector array. The spectral response models can be updated using a calibration process so that different elements of an X-ray detector array have different spectral response models.

    Abstract translation: 这里阐述了一种方法，包括利用CT成像系统的X射线探测器阵列执行一个或多个校准扫描，其中所述一个或多个校准扫描包括针对第一个 通过X射线探测器阵列的第N个元素进行一次或多次校准测量; 以及使用所述一个或多个校准测量来更新所述第一元素至第N元素的每个元素的光谱响应模型。 在另一方面，CT成像系统可以执行成像，例如， 包括材料分解（MD）成像，使用更新的光谱响应模型用于X射线探测器阵列的元素。 光谱响应模型可以使用校准过程进行更新，以便X射线探测器阵列的不同元素具有不同的光谱响应模型。

    COINCIDENCE-ENABLING PHOTON-COUNTING DETECTOR
    7.
    发明申请
    COINCIDENCE-ENABLING PHOTON-COUNTING DETECTOR 审中-公开

    公开(公告)号：WO2018144127A1

    公开(公告)日：2018-08-09

    申请号：PCT/US2017/064641

    申请日：2017-12-05

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： FU, Geng ,  JIN, Yannan ,  EDIC, Peter Michael ,  CHEN, Feng

    IPC: G01T1/17 ,  G01T1/24 ,  G01T1/29

    Abstract: The present approach relates to the use of energy-resolved, photon-counting detectors, such as CZT- or CdTe-based detectors, to acquire spectral information that is not available with conventional energy-integrating detectors. In certain embodiments, the present approach discussed reduces or eliminates spectral contamination incurred by transient signals in neighboring pixels in designs employing coincidence logic and shaping amplifiers with short shaping times.

    IMAGING METHOD AND SYSTEM OF TUBE VOLTAGE AND CURRENT OPTIMIZATION
    8.
    发明申请
    IMAGING METHOD AND SYSTEM OF TUBE VOLTAGE AND CURRENT OPTIMIZATION 审中-公开
    管电压成像方法与系统优化

    公开(公告)号：WO2016133986A1

    公开(公告)日：2016-08-25

    申请号：PCT/US2016/018214

    申请日：2016-02-17

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： JIN, Yannan ,  DE MAN, Bruno, Kristiaan, Bernard ,  EDIC, Peter, Michael ,  FITZGERALD, Paul, Francis ,  RUI, Xue ,  YANGYANG, Yao ,  YIN, Zhye ,  WEIDMANN, Uwe

    IPC: A61B6/03 ,  A61B6/00

    CPC classification number: A61B6/405 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/488 ,  A61B6/5205 ,  A61B6/542

    Abstract: An imaging method includes executing a low-dose preparatory scan to an object by applying tube voltages and tube currents in an x-ray source, and generating a first image of the object corresponding to the low-dose preparatory scan. The method further includes generating image quality estimates and dose estimates view by view at least based on the first image. The method includes optimizing the tube voltages and the tube currents to generate optimal profiles for the tube voltage and the tube current. At least one of the optimal profiles for the tube voltage and the tube current is generated based on the image quality estimates and dose estimates. The method includes executing an acquisition scan by applying the tube voltages and the tube currents based on the optimal profiles and generating a second image of the object corresponding to the acquisition scan. An imaging system is also provided.

    Abstract translation: 成像方法包括通过在x射线源中施加管电压和管电流来对对象执行低剂量预备扫描，以及生成对应于低剂量预备扫描的对象的第一图像。 该方法还包括至少基于第一图像通过视图生成图像质量估计和剂量估计视图。 该方法包括优化管电压和管电流以产生管电压和管电流的最佳轮廓。 基于图像质量估计和剂量估计，产生管电压和管电流的最佳曲线中的至少一个。 该方法包括通过基于最佳轮廓施加管电压和管电流来执行采集扫描，并且生成对应于采集扫描的对象的第二图像。 还提供了一种成像系统。

    COMPUTED TOMOGRAPHY SYSTEM AND METHOD CONFIGURED TO IMAGE AT DIFFERENT ENERGY LEVELS AND FOCAL SPOT POSITIONS
    9.
    发明公开
    COMPUTED TOMOGRAPHY SYSTEM AND METHOD CONFIGURED TO IMAGE AT DIFFERENT ENERGY LEVELS AND FOCAL SPOT POSITIONS 审中-公开

    公开(公告)号：EP3578104A1

    公开(公告)日：2019-12-11

    申请号：EP19178545.0

    申请日：2019-06-05

    Applicant: General Electric Company

    Inventor： FAN, Jiahua ,  JIN, Yannan ,  YAN, Ming ,  WIEDMANN, Uwe

    IPC: A61B6/00 ,  A61B6/03 ,  H01J35/00 ,  G21K1/08

    Abstract: A computed tomography (CT) imaging system (100) and method, wherein the system includes an x-ray source (114) that is operable to emit a beam (215) of x-rays (116) from a focal spot and move a spot position of the focal spot. The system also includes a detector assembly that is configured to detect the x-rays (116) attenuated by the object. At least one processing unit (136) is configured to execute programmed instructions stored in memory. The at least one processing unit (136) is configured to direct the x-ray source (114) to emit different beams (215) of the x-rays (116) at different energy levels and to receive data from the detector assembly that are representative of detection of the x-rays (116) emitted at the different energy levels. The at least one processing unit (136) is also configured to direct the x-ray source (114) to move the focal spot such that the focal spot is at different spot positions while the different beams (215) are emitted.

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