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    SYSTEM AND METHOD OF ELIMINATING IMAGE ARTIFACTS
    3.
    发明申请
    SYSTEM AND METHOD OF ELIMINATING IMAGE ARTIFACTS 有权
    消除影像艺术的系统和方法

    公开(公告)号：US20110139993A1

    公开(公告)日：2011-06-16

    申请号：US12637069

    申请日：2009-12-14

    申请人： James Zhengshe Liu ,  Feng Gao ,  Kenneth Scott Kump

    发明人： James Zhengshe Liu ,  Feng Gao ,  Kenneth Scott Kump

    IPC分类号： G01T1/24

    CPC分类号： H04N5/32 ,  A61B6/508 ,  A61B6/5258 ,  H04N5/3577

    摘要： A system and method for eliminating image artifacts caused by electromagnetic interference (EMI) on a digital x-ray detector. The system and method includes a digital x-ray detector panel having an array of pixels in rows and columns, with a plurality of data lines coupled to the columns of pixels and a plurality of scan lines coupled to the rows of pixels. The system and method uses certain photodiodes in a row of the pixel array for measuring EMI with corresponding scan line and FETs deactivated and eliminating the EMI and image artifacts with the remaining photodiodes in the row with corresponding scan line and FETs activated.

    摘要翻译： 一种用于消除由数字X射线检测器上的电磁干扰（EMI）引起的图像伪影的系统和方法。 该系统和方法包括数字X射线检测器面板，其具有行和列中的像素阵列，多个数据线耦合到像素列，以及耦合到像素行的多条扫描线。 该系统和方法使用像素阵列的一行中的某些光电二极管来测量具有相应扫描线的EMI，并且FET被去激活，并且消除了具有相应扫描线和FET的行中剩余的光电二极管的EMI和图像伪影。

    Artifact reduction system and method for radiological imaging system
    5.
    发明授权
    Artifact reduction system and method for radiological imaging system 失效
    放射成像系统的神器减少系统和方法

    公开(公告)号：US07649979B2

    公开(公告)日：2010-01-19

    申请号：US12124355

    申请日：2008-05-21

    申请人： James Zhengshe Liu ,  Tiantian Zhang ,  Kenneth Scott Kump ,  Jingyi Liang ,  Chuande Liu ,  Kadri Nizar Jabri

    发明人： James Zhengshe Liu ,  Tiantian Zhang ,  Kenneth Scott Kump ,  Jingyi Liang ,  Chuande Liu ,  Kadri Nizar Jabri

    IPC分类号： H05G1/64

    CPC分类号： H04N5/32 ,  H04N5/3577

    摘要： The effects of electromagnetic interference (EMI) on X-ray image data is corrected by characterizing the EMI and processing the image data to subtract the EMI effects from the image data. The X-ray image data, along with offset data, are collected in a conventional manner, affected by EMI if present, and EMI-characterizing data is immediately collected thereafter by disabling rows of a digital detector (FET off). The EMI-characterizing data, then, is not affected by the presence of image data, and can be used to characterize the amplitude and frequency of the EMI. The EMI-characterizing data is assured of being in phase with the collected image and offset data due to its collection in the same image acquisition sequence immediately following the collection of image and offset data. Artifacts due to the presence of EMI are thus eliminated from reconstructed images based upon the corrected data.

    摘要翻译： 电磁干扰（EMI）对X射线图像数据的影响通过表征EMI和处理图像数据来校正，以从图像数据中减去EMI效应。 X射线图像数据以及偏移数据以常规方式收集，受EMI影响（如果存在），并且EMI特征数据立即收集，此后通过禁用数字检测器（FET关闭）的行。 EMI表征数据然后不受图像数据的存在的影响，并且可以用于表征EMI的幅度和频率。 EMI特征数据被确保与收集的图像和偏移数据同步，这是由于其在收集图像和偏移数据之后的相同图像采集序列中的收集。 因此，由于存在EMI的人为因素基于校正数据而从重构图像中消除。

    Method and apparatus for determining a dynamic range of a digital medical image
    6.
    发明授权
    Method and apparatus for determining a dynamic range of a digital medical image 有权
    用于确定数字医学图像的动态范围的方法和装置

    公开(公告)号：US07221782B1

    公开(公告)日：2007-05-22

    申请号：US09344190

    申请日：1999-06-24

    申请人： Kenneth Scott Kump

    发明人： Kenneth Scott Kump

    IPC分类号： G06K9/00

    CPC分类号： A61B5/055 ,  A61B6/00 ,  A61B8/00 ,  G06T7/11 ,  G06T7/136 ,  G06T2207/10116

    摘要： A method and apparatus are provided for adjusting a dynamic range of a digital medical image for a medical imaging system. The digital medical image contains a clinical region and a non-clinical region. The method and apparatus identify the non-clinical region of the digital medical image and mask the non-clinical region therefrom to form a clinical image. The clinical image is then used to calculate a desired dynamic range for the medical imaging system. The dynamic range of the medical imaging system is adjusted accordingly. According to one embodiment, the non-clinical region is identified by dividing the digital medical image into bands of a predetermined width, generating profiles for each band and differentiating the profiles to obtain a differentiated profile of each band of a digital medical image. The differentiated profile is than analyzed to identify peaks that exceed predetermined thresholds, wherein the regions of the differentiated profile proximate the peaks exceeding the threshold correspond to non-clinical regions. Once the non-clinical regions are identified, they are masked or removed. Next, a desired image characteristic, such as maximum and minimum gray scale values, are determined for the clinical region and a desired dynamic range for the image is obtained based on the image characteristics of the clinical region. In an alternative embodiment, a histogram is used to identify the non-clinical regions which are subsequently masked from the digital medical image.

    摘要翻译： 提供了一种用于调整用于医学成像系统的数字医学图像的动态范围的方法和装置。 数字医学图像包含临床区域和非临床区域。 该方法和装置识别数字医学图像的非临床区域并掩盖其中的非临床区域以形成临床图像。 然后使用临床图像来计算医学成像系统的期望的动态范围。 相应地调整医学成像系统的动态范围。 根据一个实施例，通过将数字医学图像划分成预定宽度的频带来识别非临床区域，产生每个频带的分布，并且区分分布，以获得数字医学图像的每个频带的差异分布。 分析差异谱以鉴定超过预定阈值的峰，其中接近超过阈值的峰的分化谱的区域对应于非临床区域。 一旦鉴定了非临床区域，就会屏蔽或移除。 接下来，针对临床区域确定期望的图像特征，例如最大和最小灰度值，并且基于临床区域的图像特征获得图像的期望动态范围。 在替代实施例中，使用直方图来识别随后从数字医学图像中掩蔽的非临床区域。

    Method and apparatus for automated image quality evaluation of X-ray systems using any of multiple phantoms
    7.
    发明授权
    Method and apparatus for automated image quality evaluation of X-ray systems using any of multiple phantoms 有权
    用于使用多个幻影中的任一个的X射线系统的自动图像质量评估的方法和装置

    公开(公告)号：US06694047B1

    公开(公告)日：2004-02-17

    申请号：US09354389

    申请日：1999-07-15

    申请人： Farshid Farrokhnia ,  Kenneth Scott Kump ,  Richard Aufrichtig ,  Alexander Y. Tokman

    发明人： Farshid Farrokhnia ,  Kenneth Scott Kump ,  Richard Aufrichtig ,  Alexander Y. Tokman

    IPC分类号： G06K900

    CPC分类号： A61B6/583

    摘要： A system for automated x-ray system parameter evaluation is provided. A physical model or template is created and stored in the system, one for each desired phantom. The automated system imports a grayscale x-ray image and then processes the image to determine image components. First, a histogram of the image is created, then a threshold in the histogram is determined and the imported image is binarized with respect to the threshold. Next, connected component analysis is used to determine image components. If the components do not match, then the image is rejected. The system next locates landmarks in the imported image corresponding to expected physical structures. The landmarks include a perimeter ring, vertical and horizontal line segments, and fiducials. The system uses the landmarks to predict Regions of Interest (ROIs) where measurement of the x-ray system parameters takes place. Finally, the x-ray system parameters are measured in the identified ROIs.

    摘要翻译： 提供了一种自动X射线系统参数评估系统。 物理模型或模板被创建并存储在系统中，每个想要的幻影一个。 自动化系统导入灰度x射线图像，然后处理图像以确定图像分量。 首先，创建图像的直方图，然后确定直方图中的阈值，并将导入的图像相对于阈值二值化。 接下来，使用连通分量分析来确定图像分量。 如果组件不匹配，则图像被拒绝。 系统接下来根据预期的物理结构定位导入的图像中的地标。 地标包括周边环，垂直和水平线段以及基准点。 该系统使用地标来预测发生X射线系统参数测量的感兴趣区域（ROI）。 最后，在所识别的ROI中测量x射线系统参数。

    Low-dose exposure aided positioning (LEAP) for digital radiography
    10.
    发明授权
    Low-dose exposure aided positioning (LEAP) for digital radiography 有权
    低剂量曝光辅助定位（LEAP）用于数字射线照相

    公开(公告)号：US06827489B2

    公开(公告)日：2004-12-07

    申请号：US10003490

    申请日：2001-11-01

    申请人： Francois Serge Nicolas ,  Vincent S. Polkus ,  Kenneth Scott Kump ,  Remy Andre Klausz

    发明人： Francois Serge Nicolas ,  Vincent S. Polkus ,  Kenneth Scott Kump ,  Remy Andre Klausz

    IPC分类号： A61B608

    CPC分类号： A61B6/08 ,  A61B6/0457 ,  A61B6/482 ,  A61B6/488 ,  A61B6/544 ,  A61B6/548

    摘要： A system and method for improved imaging of a patient through the use of low-dose exposure aided positioning is provided. The patient is positioned in the X-ray system and them imaged with a low-dose pre-shot to verify the positioning of the patient. If the patient's positioning is acceptable, the patient is then imaged with a full-dose X-ray exposure. If the patient's positioning is not acceptable, the patient is repositioned and re-imaged with a low-dose pre-shot until the patient's positioning is acceptable. The low-dose pre-shot may take the form of a low-dose X-ray imaging sequence. The present invention thus provides for rapid verification of the proper positioning of the patient in the X-ray system in order to provide for optimal X-ray image quality. Additionally, the X-ray imaging system thus minimizes the additional exposure to X-ray radiation on the part of the patient.

    摘要翻译： 提供了一种通过使用低剂量曝光辅助定位来改善患者成像的系统和方法。 将患者定位在X射线系统中，并以低剂量预注射成像，以验证患者的位置。 如果患者的定位是可接受的，则用全剂量X射线曝光对患者进行成像。 如果患者的定位不可接受，则患者将重新定位并以低剂量预注射重新成像，直到患者的定位可接受为止。 低剂量预注射可以采取低剂量X射线成像序列的形式。 因此，本发明提供了快速验证患者在X射线系统中的适当定位，以便提供最佳的X射线图像质量。 此外，X射线成像系统因此使对患者部分的X射线辐射的附加暴露最小化。