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    • 7. 发明申请
    • SYSTEM AND METHOD OF SPECTRAL CALIBRATION AND BASIS MATERIAL DECOMPOSITION FOR X-RAY CT SYSTEMS
    • X射线CT系统的光谱校准和基础材料分解系统与方法
    • US20120069952A1
    • 2012-03-22
    • US12883631
    • 2010-09-16
    • Xiaoye WuDan XuNaveen ChandraZhanyu GeJiang HsiehDaniel David HarrisonMary Sue Kulpins
    • Xiaoye WuDan XuNaveen ChandraZhanyu GeJiang HsiehDaniel David HarrisonMary Sue Kulpins
    • A61B6/03
    • A61B6/583A61B6/032A61B6/482A61B6/585
    • An imaging system includes an x-ray source that emits a beam of x-rays toward an object, a detector that receives high frequency electromagnetic energy attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to compute detector coefficients based on a static low kVp measurement and a static high kVp measurement, capture incident spectra at high and low kVp during fast kVp switching, compute effective X-ray incident spectra at high and low kVp during fast kVp switching using the captured incident spectra, scan a water phantom and normalize the computed detector coefficients to water, adjust the computed effective X-ray incident spectra based on the normalized detector coefficients, compute basis material decomposition functions using the adjusted X-ray incident spectra, and generate one or more basis material density images using the computed basis material decomposition functions.
    • 成像系统包括:x射线源,其朝向物体发射X射线束;接收被物体衰减的高频电磁能的检测器;可操作地连接到检测器的数据采集系统(DAS);以及计算机 可操作地连接到DAS。 计算机被编程为基于静态低kVp测量和静态高kVp测量来计算检测器系数,在快速kVp切换期间在高和低kVp处捕获入射光谱,在快速kVp期间计算高和低kVp处的有效X射线入射光谱 使用捕获的入射光谱切换,扫描水体模型并将计算的检测器系数归一化为水,基于归一化的检测器系数调整计算的有效X射线入射光谱,使用调整的X射线入射光谱计算基础材料分解函数, 并使用所计算的基础材料分解函数生成一个或多个基础材料密度图像。
    • 8. 发明授权
    • System and method of spectral calibration and basis material decomposition for X-ray CT systems
    • X射线CT系统的光谱校准和基材分解的系统和方法
    • US08315352B2
    • 2012-11-20
    • US12883631
    • 2010-09-16
    • Xiaoye WuDan XuNaveen ChandraZhanyu GeJiang HsiehDaniel David HarrisonMary Sue Kulpins
    • Xiaoye WuDan XuNaveen ChandraZhanyu GeJiang HsiehDaniel David HarrisonMary Sue Kulpins
    • A61B6/00H05G1/64G06K9/00
    • A61B6/583A61B6/032A61B6/482A61B6/585
    • An imaging system includes an x-ray source that emits a beam of x-rays toward an object, a detector that receives high frequency electromagnetic energy attenuated by the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS. The computer is programmed to compute detector coefficients based on a static low kVp measurement and a static high kVp measurement, capture incident spectra at high and low kVp during fast kVp switching, compute effective X-ray incident spectra at high and low kVp during fast kVp switching using the captured incident spectra, scan a water phantom and normalize the computed detector coefficients to water, adjust the computed effective X-ray incident spectra based on the normalized detector coefficients, compute basis material decomposition functions using the adjusted X-ray incident spectra, and generate one or more basis material density images using the computed basis material decomposition functions.
    • 成像系统包括:x射线源,其朝向物体发射X射线束;接收被物体衰减的高频电磁能的检测器;可操作地连接到检测器的数据采集系统(DAS);以及计算机 可操作地连接到DAS。 计算机被编程为基于静态低kVp测量和静态高kVp测量来计算检测器系数,在快速kVp切换期间在高和低kVp处捕获入射光谱,在快速kVp期间计算高和低kVp处的有效X射线入射光谱 使用捕获的入射光谱切换,扫描水体模型并将计算的检测器系数归一化为水,基于归一化的检测器系数调整计算的有效X射线入射光谱,使用调整的X射线入射光谱计算基础材料分解函数, 并使用所计算的基础材料分解函数生成一个或多个基础材料密度图像。
    • 10. 发明授权
    • Method of dose reduction for CT imaging and apparatus for implementing same
    • CT成像剂量减少方法及其实施方法
    • US08942341B2
    • 2015-01-27
    • US13223665
    • 2011-09-01
    • Jiang HsiehAbdelaziz IkhlefPaavana SainathXiaoye WuRoman Melnyk
    • Jiang HsiehAbdelaziz IkhlefPaavana SainathXiaoye WuRoman Melnyk
    • A61B6/03G21K3/00A61B6/06A61B6/00
    • A61B6/032A61B6/06A61B6/4078A61B6/503A61B6/542
    • A CT system includes an x-ray source configured to project an x-ray beam toward an object, a detector array, and a bowtie filter. The bowtie filter includes a first x-ray filtration region positioned to attenuate x-rays that pass through an isochannel of the detector array, a second x-ray filtration region positioned to attenuate x-rays that pass through channels of the detector array that are offcenter in a channel direction from the isochannel, and an x-ray attenuation material positionable to attenuate the x-rays that pass through the channels of the detector array that are offcenter in the channel direction from the isochannel. The CT system also includes a data acquisition system (DAS) connected to the detector array and configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.
    • CT系统包括被配置为将X射线束投影到物体的X射线源,检测器阵列和bowtie滤波器。 弓形过滤器包括第一x射线过滤区域,其定位成衰减穿过检测器阵列的等通道的x射线;第二x射线过滤区域,其被定位成衰减穿过检测器阵列的通道的x射线, 离子中心在来自等信道的通道方向上,以及x射线衰减材料,其可定位成衰减穿过检测器阵列的通道的X射线,所述X射线在通道方向上偏离同步通道。 CT系统还包括连接到检测器阵列并被配置为接收来自检测器阵列的输出的数据采集系统(DAS),以及被编程为获取对象的成像数据的投影的计算机,并且使用 成像数据。