FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES

    公开(公告)号:EP2745265B1

    公开(公告)日:2018-07-18

    申请号:EP12758896.0

    申请日:2012-07-27

    IPC分类号: G06T5/50

    摘要: In phase-contrast imaging, different types of image information, such as absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process and have different image properties. A frequency dependent combination of different types of image information is obtained, the combined image having improved properties over the image information and respective image information types. Accordingly, an apparatus and a method for image processing in X-ray imaging of an object is provided, including receiving first and second image information of the object of first and second image information types, respectively, where the second image information type is different from the first image information type. The first and second image information is combined to obtain combined image information of the object, where the combined image information is frequency-dependent, depending on spatial frequencies of the first and second image information, respectively.

    AUTOMATIC DETERMINATION OF REGULARIZATION FACTOR FOR ITERATIVE IMAGE RECONSTRUCTION WITH REGULARIZATION AND/OR IMAGE DE-NOISING
    2.
    发明授权
    AUTOMATIC DETERMINATION OF REGULARIZATION FACTOR FOR ITERATIVE IMAGE RECONSTRUCTION WITH REGULARIZATION AND/OR IMAGE DE-NOISING 有权
    正则化和/或图像去噪法自动确定迭代图像重建的正则化因子

    公开(公告)号:EP2748798B1

    公开(公告)日:2018-04-11

    申请号:EP12812393.2

    申请日:2012-12-04

    IPC分类号: G06T11/00

    摘要: A processing component (122) processes images based on an iterative reconstruction algorithm with regularization and/or de-noising algorithm. The processing component includes a set point determiner (224) that determines a quality set point (216) between predetermined lower and upper quality bounds (226) based on a quality variable (228) indicative of an image quality of interest. The processing component further includes a comparator (214) that compares, each processing iteration, a quality metric of a current generated image with the quality set point and generates a difference value indicative of a difference between the quality metric and the quality set point. The processing component further includes a regularization factor updater (220) that generates an updated regularization factor for a next processing iteration based on a current value (222) of the regularization factor and at least the quality metric in response to the difference value indicating that the quality metric is outside of a predetermined range about the quality set point.

    SPECTRAL IMAGING
    4.
    发明公开
    SPECTRAL IMAGING 有权
    SPEKTRALBILDGEBUNG

    公开(公告)号:EP2820449A2

    公开(公告)日:2015-01-07

    申请号:EP13717314.2

    申请日:2013-02-20

    IPC分类号: G01T1/29

    摘要: An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.

    摘要翻译: 一种成像系统包括:辐射源(106),其辐射穿过检查区域和被检体的一部分的辐射;以及检测器阵列(114),其检测穿过检查区域和被检体的部分的辐射,并产生信号 指示。 基于由辐射源和检测器阵列获取的第一和第二2D投影的光谱分解,体积扫描参数推荐器(120)针对对象的该部分的体扫描推荐至少一个光谱扫描参数值。 第一和第二2D投影具有不同的光谱特征。 控制台(122)采用推荐的至少一个光谱扫描参数值来对被摄体的该部分进行体积扫描。

    METAL ARTIFACT REDUCTION FROM METALLIC DENTAL FILLINGS AND/OR CROWNS IN COMPUTED TOMOGRAPHY (CT) AND/OR X-RAY
    5.
    发明公开
    METAL ARTIFACT REDUCTION FROM METALLIC DENTAL FILLINGS AND/OR CROWNS IN COMPUTED TOMOGRAPHY (CT) AND/OR X-RAY 有权
    金属伪影,从金属填充物和/或冠部在计算机断层摄影(CT)和/或用于X射线REDUCTION

    公开(公告)号:EP2806801A1

    公开(公告)日:2014-12-03

    申请号:EP13713965.5

    申请日:2013-01-22

    发明人: KOEHLER, Thomas

    摘要: A method includes planning a head scan of a subject via a console (716) of an imaging system (700), wherein the head scan scans both jaws of the subject, including metallic dental fillings of teeth of the subject, scanning the subject 108, including the metallic dental fillings of the teeth of the subject, via the imaging system, wherein the subject has a dental metal artifact reduction device(802) installed in their mouth during the scan, and generating projection data indicative of the scanned region of the head of the subject, including the metallic dental fillings of the teeth of the subject.

    摘要翻译: 一种方法包括通过一种成像系统(700)worin头扫描可扫描被检者的颚,包括受试者的牙齿的金属牙齿填充物的一个控制台(716)规划对象的头扫描中,扫描对象108, 包括所述受试者的牙齿的金属牙齿填充物,通过成像系统,worin所述受试者具有在扫描期间安装在他们的口牙科金属伪影减少装置(802),和产生指示所述头的扫描区域的投影数据 的主题,包括受治疗者的牙齿的金属牙齿填充。

    FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES
    6.
    发明公开
    FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES 有权
    不同方法的X射线图像的频率基于组合

    公开(公告)号:EP2745265A1

    公开(公告)日:2014-06-25

    申请号:EP12758896.0

    申请日:2012-07-27

    IPC分类号: G06T5/50

    摘要: In phase-contrast imaging, different types of image information, such as absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process and have different image properties. A frequency dependent combination of different types of image information is obtained, the combined image having improved properties over the image information and respective image information types. Accordingly, an apparatus and a method for image processing in X-ray imaging of an object is provided, including receiving first and second image information of the object of first and second image information types, respectively, where the second image information type is different from the first image information type. The first and second image information is combined to obtain combined image information of the object, where the combined image information is frequency-dependent, depending on spatial frequencies of the first and second image information, respectively.

    IMAGE GENERATION APPARATUS
    7.
    发明公开
    IMAGE GENERATION APPARATUS 审中-公开
    图像生成装置

    公开(公告)号:EP2736413A1

    公开(公告)日:2014-06-04

    申请号:EP12740699.9

    申请日:2012-07-02

    发明人: KOEHLER, Thomas

    IPC分类号: A61B6/03 G06T5/50 G06T11/00

    摘要: The invention relates to an image generation apparatus for generating an image of an object. An image providing unit (11, 16) provides a first image of the object and a second image of the object, wherein the first image has a smaller noise level than the second image. A display window providing unit (12) provides a display window being indicative of the range of image values shown on a display (14), and a combining unit (13) generates a combination image by combining the first image and the second image depending on the window width of the provided display window. This allows considering the influence of the display window on the noise appearance. Thus, by taking into account the first image and the second image having different noise levels and the provided display window, a combined image can be generated, which has an improved noise appearance.

    摘要翻译: 本发明涉及用于生成对象的图像的图像生成装置。 图像提供单元(11,16)提供对象的第一图像和对象的第二图像,其中第一图像具有比第二图像更小的噪声水平。 显示窗口提供单元(12)提供指示在显示器(14)上显示的图像值的范围的显示窗口,并且组合单元(13)通过依赖于第一图像和第二图像的组合来生成组合图像 提供的显示窗口的窗口宽度。 这允许考虑显示窗对噪声外观的影响。 因此,通过考虑具有不同噪声水平的第一图像和第二图像以及所提供的显示窗口,可以生成具有改善的噪声外观的组合图像。

    METHOD AND DEVICE FOR IMAGING SOFT BODY TISSUE USING X-RAY PROJECTION AND OPTICAL TOMOGRAPHY
    9.
    发明公开
    METHOD AND DEVICE FOR IMAGING SOFT BODY TISSUE USING X-RAY PROJECTION AND OPTICAL TOMOGRAPHY 审中-公开
    方法和装置用于软组织体由射线投影和光学成像图片

    公开(公告)号:EP2782504A1

    公开(公告)日:2014-10-01

    申请号:EP12809338.2

    申请日:2012-11-13

    IPC分类号: A61B6/00 A61B5/00

    摘要: Soft body tissue, such as a female breast, is imaged using X-ray projection techniques and optical tomography techniques. First image data for a first image of a breast (17) are acquired by X-ray projection using an X-ray source (3) and an X-ray detector (5). Second image data for a second image are acquired using optical tomography equipment comprising a light source (9) and a light detector (11). From the first image data, estimated bulk optical properties of the breast (17) are be derived. Based on such estimated bulk optical properties, an optical tomography image is reconstructed from the second image data with high image quality. Performing mammography acquisition at different compression states of the breast (17) improves patient comfort. Mammograms are acquired at two different compression states wherein a first compression state is adapted to provide high image resolution. At a second compression state, another mammogram may be acquired together with an optical tomography image. The two mammograms are used for image registration thereby possibly providing information for a deformation transform. Additional information on tissue composition within the breast is received by acquiring the first and second mammogram at different X-ray settings.