SYSTEM AND METHOD FOR BACKGROUND PHASE CORRECTION FOR PHASE CONTRAST FLOW IMAGES
    7.
    发明申请
    SYSTEM AND METHOD FOR BACKGROUND PHASE CORRECTION FOR PHASE CONTRAST FLOW IMAGES 有权
    用于相位对比流图像的相位校正的系统和方法

    公开(公告)号:US20120076380A1

    公开(公告)日:2012-03-29

    申请号:US13210497

    申请日:2011-08-16

    IPC分类号: G06K9/00

    摘要: A method for correcting the background phase in magnetic resonance phase contrast flow images includes providing a time series of velocity encoded magnetic resonance images of a patient, where the time series of velocity encoded images comprises for each time point a phase contrast image where a pixel intensity is proportional to a flow velocity, measuring a change of intensity for each pixel over the time series of phase contrast images, identifying pixels with a low measure of temporal change as stationary pixels, and calculating a correction field for the stationary pixels, where the correction field represents a background phase to be subtracted from the phase contrast image.

    摘要翻译: 用于校正磁共振相位对比流图像中的背景相位的方法包括提供患者的速度编码的磁共振图像的时间序列,其中速度编码图像的时间序列包括每个时间点的像素强度 与流速成比例,测量在相位对比图像的时间序列上的每个像素的强度变化,将以时间变化的低度量度的像素识别为静止像素,以及计算用于静止像素的校正场,其中校正 场表示从相位差图像中减去的背景相位。

    Editing of pre-segmented images using seeds derived from contours
    8.
    发明授权
    Editing of pre-segmented images using seeds derived from contours 有权
    使用源自轮廓的种子编辑预分割图像

    公开(公告)号:US08131076B2

    公开(公告)日:2012-03-06

    申请号:US12031966

    申请日:2008-02-15

    IPC分类号: G06K9/34

    CPC分类号: G06K9/342

    摘要: A method for processing an object in image data includes the steps of drawing a contour on a pre-segmentation of an object in image data, generating at least one seed point on the pre-segmentation from an intersection of the contour and the pre-segmentation, providing a weighting factor between the seed points and the pre-segmentation, and segmenting the pre-segmentation using the seed points and the weighting factor to generate a new pre-segmentation.

    摘要翻译: 一种用于处理图像数据中的对象的方法包括以下步骤:对图像数据中的对象的预分割绘制轮廓,从轮廓和预分割的交点产生预分割上的至少一个种子点 提供种子点和预分割之间的加权因子,以及使用种子点和加权因子分割预分割以产生新的预分割。

    Contrast-invariant registration of cardiac and renal magnetic resonance perfusion images
    9.
    发明授权
    Contrast-invariant registration of cardiac and renal magnetic resonance perfusion images 有权
    心脏和肾脏磁共振灌注图像的对比不变记录

    公开(公告)号:US07734075B2

    公开(公告)日:2010-06-08

    申请号:US11078035

    申请日:2005-03-11

    IPC分类号: G06K9/00 A61B5/05

    CPC分类号: A61B5/055

    摘要: A system and method are provided for contrast-invariant registration of images, the system including a processor, an imaging adapter or a communications adapter for receiving an image data sequence, a user interface adapter for selecting a reference frame from the image sequence or cropping a region of interest (ROI) from the reference frame, a tracking unit for tracking the ROI across the image sequence, and an estimation unit for segmenting the ROI in the reference frame or performing an affine registration for the ROI; and the method including receiving an image sequence, selecting a reference frame from the image sequence, cropping a region of interest (ROI) from the reference frame, tracking the ROI across the image sequence, segmenting the ROI in the reference frame, and performing an affine registration for the ROI.

    摘要翻译: 提供了用于对比度不变的图像配准的系统和方法,所述系统包括处理器,成像适配器或用于接收图像数据序列的通信适配器,用于从图像序列中选择参考帧的用户接口适配器或裁剪 来自参考帧的感兴趣区域(ROI),用于跟踪跨越图像序列的ROI的跟踪单元,以及用于在参考帧中分割ROI或对ROI执行仿射注册的估计单元; 并且所述方法包括接收图像序列,从所述图像序列中选择参考帧,从所述参考帧裁剪感兴趣区域(ROI),沿所述图像序列跟踪所述ROI,在所述参考帧中分割所述ROI,以及执行 ROI的仿射注册。