Method For Image Reconstruction From Undersampled Medical Imaging Data
    11.
    发明申请
    Method For Image Reconstruction From Undersampled Medical Imaging Data 有权
    从未采样的医学成像数据进行图像重建的方法

    公开(公告)号:US20100207629A1

    公开(公告)日:2010-08-19

    申请号:US12705818

    申请日:2010-02-15

    IPC分类号: G01R33/48

    摘要: A method for image reconstruction that utilizes a generalization of compressed sensing is provided. More particularly, a method for homotopic l0 minimization is provided, in which a series of subproblems that asymptotically approach a solution to the l0 minimization are iteratively solved. These subproblems include utilizing concave metric prior functionals in the traditional compressed sensing framework. Substantially undersampled image data is acquired from a subject, for example, with a medical imaging system, such as a magnetic resonance imaging (“MRI”) system or a computed tomography (“CT”) system. Using the provided method, undersampling on the order of around 96 percent can be achieved while still producing clinically acceptable images.

    摘要翻译: 提供了一种利用压缩感知泛化的图像重建方法。 更具体地,提供了一种用于同位素最小化的方法,其中迭代地解决渐近地接近10个最小化的解的一系列子问题。 这些子问题包括在传统的压缩感知框架中利用凹度度量先验函数。 例如使用诸如磁共振成像(“MRI”)系统或计算机断层扫描(“CT”)系统的医学成像系统从受试者获取基本欠采样的图像数据。 使用所提供的方法,可以在仍然产生临床可接受的图像的同时实现大约96%的低采样。

    Method for magnetic resonance elastography inversion using a finite medium model
    12.
    发明授权
    Method for magnetic resonance elastography inversion using a finite medium model 有权
    使用有限介质模型进行磁共振弹性成像反演的方法

    公开(公告)号:US09562960B2

    公开(公告)日:2017-02-07

    申请号:US12935968

    申请日:2009-04-03

    IPC分类号: A61B5/055 G01R33/563 A61B5/00

    摘要: A method for magnetic resonance elastography (“MRE”) is described, in which an MRE inversion that accounts for waves propagating in a finite, bounded media is employed. A vibratory motion is induced in a subject and MRE is performed to measure one or more components of the resulting displacement produced in the subject. This displacement data is subsequently filtered to provide a more accurate and computationally efficient method of inversion. Wave equations based on the geometry of the bounded media are then utilized to calculate the material properties of the subject. Such a method allows for the performance of MRE on tissues such as the heart, eye, bladder, and prostate with more accurate results.

    摘要翻译: 描述了一种用于磁共振弹性成像(“MRE”)的方法,其中采用考虑在有限的有界介质中传播的波的MRE反演。 在受试者中诱发振动,并执行MRE以测量在受试者中产生的所得到的位移的一个或多个成分。 随后对该位移数据进行滤波以提供更精确和计算上有效的反演方法。 然后利用基于有界介质的几何形状的波动方程来计算受试者的材料性质。 这种方法允许在更精确的结果上在诸如心脏,眼睛,膀胱和前列腺的组织上表现MRE。

    Physical motion information capturing of a subject during magnetic resonce imaging automatically motion corrected by the magnetic resonance system
    16.
    发明授权
    Physical motion information capturing of a subject during magnetic resonce imaging automatically motion corrected by the magnetic resonance system 失效
    在由磁共振系统校正的磁共振成像期间自动运动的被摄物体的物理运动信息捕获

    公开(公告)号:US08653816B2

    公开(公告)日:2014-02-18

    申请号:US12612172

    申请日:2009-11-04

    IPC分类号: G01R33/565

    CPC分类号: G01R33/56509

    摘要: Systems, methods and articles of manufacture are disclosed for compensating for motion of a subject during an MRI scan of the subject. k-space data may be received from the MRI scan of the subject. Motion information may be received for the subject. Based on the received motion information, a translational motion of the subject may be determined between a first point in time and a second point in time. A search space for motion correction may be reduced using the determined change and an error margin of the capturing technique. A motion-compensated, graphical image of the subject may be generated using the reduced search space.

    摘要翻译: 公开了用于在对象的MRI扫描期间补偿对象的运动的系统,方法和制品。 可以从对象的MRI扫描接收k空间数据。 运动信息可能会被收到。 基于接收到的运动信息,可以在第一时间点和第二时间点之间确定对象的平移运动。 可以使用确定的改变和捕获技术的误差范围来减少用于运动校正的搜索空间。 可以使用缩小的搜索空间来生成被摄体的运动补偿的图形图像。

    Simultaneous dual window/level settings for display of CT colonography images
    17.
    发明授权
    Simultaneous dual window/level settings for display of CT colonography images 有权
    同时双窗口/级别设置显示CT结肠图像

    公开(公告)号:US08442290B2

    公开(公告)日:2013-05-14

    申请号:US12523465

    申请日:2008-01-22

    IPC分类号: G06K9/00

    CPC分类号: G06T19/00 G06T2210/41

    摘要: A method for processing and displaying colonography image data. First distance tissue pixels representative of tissue within a first distance of gas pixels representative of gas are processed with a first window/level setting to generate a first setting set of image pixels. Second distance tissue pixels representative of tissue within a second distance of the gas pixels are processed with a second window/level setting to generate a second setting set of image pixels. The second distance is a distance greater than the first distance. A colonography image including both the first and second setting sets of image pixels is then displayed.

    摘要翻译: 一种处理和显示结肠图像数据的方法。 代表气体的气体像素的第一距离内的组织的第一距离组织像素用第一窗口/等级设置进行处理,以生成图像像素的第一设置集合。 代表气体像素的第二距离内的组织的第二距离组织像素用第二窗口/等级设置进行处理,以生成图像像素的第二设置集合。 第二距离是大于第一距离的距离。 然后显示包括图像像素的第一和第二设置组的结构图像。

    Electronic stool subtraction in CT colonography
    18.
    发明授权
    Electronic stool subtraction in CT colonography 有权
    电子粪便减法CT结肠造影

    公开(公告)号:US08031921B2

    公开(公告)日:2011-10-04

    申请号:US11816264

    申请日:2006-02-14

    IPC分类号: G06K9/00

    摘要: A method for processing CT colonography input image voxel data representative of 3-dimensional images of a colon having gas and stool tagged with stool tagging agent, to remove the stool from the images. The input image voxel data is generated by an imaging instrument having a characteristic point spread function representative of instrument blurring. The point spread function of the instrument can be empirically determined, and the image data processed as a function of the point spread function to accurately identify and remove the tagged stool. In one embodiment of the invention, portions of the image data representative of the tagged stool and colon tissue are dilated as a function of the point spread function. In another embodiment, portions of the image data representative of the tagged stool are convolved with the point spread function to determine the fractional amount of stool present in the image portions, and the tagged stool subtracted by reducing the intensities of the associated portions of the image by an amount proportional to the fractional amount of stool present.

    摘要翻译: 一种用于处理CT结肠造影输入图像体素数据的方法,其代表具有标记有粪便标记剂的气体和粪便的结肠的3维图像,以从图像中去除粪便。 输入图像体素数据由具有代表仪器模糊的特征点扩散函数的成像仪生成。 仪器的点扩散函数可以根据经验确定,并且图像数据作为点扩散函数的函数进行处理,以准确识别和移除标记的粪便。 在本发明的一个实施例中,代表标记的粪便和结肠组织的图像数据的部分作为点扩散函数的函数被扩张。 在另一个实施例中,代表标记的凳子的图像数据的部分与点扩散函数进行卷积,以确定图像部分中存在的粪便的分数,并且通过降低图像的相关部分的强度来减去标记的粪便 通过与存在的粪便的分数量成比例的量。

    Autocorrection of MR images for motion artifacts
    20.
    发明授权
    Autocorrection of MR images for motion artifacts 有权
    用于运动伪像的MR图像的自动校正

    公开(公告)号:US06329819B1

    公开(公告)日:2001-12-11

    申请号:US09673489

    申请日:2000-10-16

    IPC分类号: G01V300

    摘要: An MRI image is corrected for motion artifacts using an iterative, autocorrection process in which corrections are tried and the quality of the resulting reconstructed image is measured. Metrics based on the gradient of the reconstructed image are employed to measure image quality.

    摘要翻译: 使用迭代自动校正过程来校正MRI图像,以进行修正,并测量所得到的重建图像的质量。 采用基于重建图像的梯度的度量来测量图像质量。