MR method for spatially-resolved determination of relaxation parameters
    11.
    发明授权
    MR method for spatially-resolved determination of relaxation parameters 有权
    用于空间分辨确定松弛参数的MR方法

    公开(公告)号:US07999543B2

    公开(公告)日:2011-08-16

    申请号:US11908812

    申请日:2006-03-10

    IPC分类号: G01V3/00

    CPC分类号: G01R33/50

    摘要: An MR method and apparatus determines spatially resolved relaxation parameters of a subject in an examination zone, voxel by voxel. A first MR scan sequence is applied to generate a series of first MR data sets having different echo times. A second MR scan sequence is applied to generate at least one further MR data set having an enhanced spatial resolution and reduced time resolution in comparison with the first MR data sets from the first sequence. MR combination images are generated using the first MR data sets derived from the first sequence for a portion within the k-space and the further MR data set acquired outside this portion by the second sequence. The relaxation parameters are determined from the MR combination images.

    摘要翻译: MR方法和装置确定检查区域中的受试者的空间分辨的松弛参数,体素的体素。 应用第一MR扫描序列来生成具有不同回波时间的一系列第一MR数据集。 与来自第一序列的第一MR数据集相比,应用第二MR扫描序列以生成具有增强的空间分辨率和降低的时间分辨率的至少一个另外的MR数据集。 使用从第一序列导出的用于k空间内的部分的第一MR数据集和通过第二序列在该部分之外获取的另外的MR数据集来生成MR组合图像。 松弛参数由MR组合图像确定。

    Mr Method of Determining Local Relaxation Time Values Using Calibrated Phantom
    12.
    发明申请
    Mr Method of Determining Local Relaxation Time Values Using Calibrated Phantom 失效
    使用校准Phantom确定局部松弛时间值的方法

    公开(公告)号:US20080077006A1

    公开(公告)日:2008-03-27

    申请号:US11573897

    申请日:2005-08-19

    IPC分类号: A61B5/055

    CPC分类号: G01R33/50 G01R33/58

    摘要: The invention relates to an MR method of determining local relaxation time values (T1, T2) of an examination object (5). Firstly, two or more MR images (3, 4) of the examination object (5) are recorded, each with different time parameter sets (TR1, TE1, TR2, TE2) of an imaging sequence. MR images (6, 7) of a phantom are likewise recorded, wherein the same time parameter sets (TR1, TE1, TR2, TE2) of the imaging sequence are used and wherein the phantom has a known spatial distribution of relaxation time values (T1, T2). The local relaxation time values (T1, T2) of the examination object (5) are determined by comparing image values of the MR images (3, 4) of the examination object (5) with image values of the MR images (6, 7) of the phantom and by assigning image values of the MR images of the phantom to relaxation time values (T1, T2) according to the known spatial distribution of relaxation time values (T1, T2) of the phantom.

    摘要翻译: 本发明涉及一种用于确定检查对象(5)的局部弛豫时间值(T 1,T 2> 2)的MR方法。 首先,记录检查对象(5)的两个或更多个MR图像(3,4),每个具有不同的时间参数组(TR <1> 1,TE 1,TR 2/2,TE 2 2)。 同样地记录了体模的MR图像(6,7),其中相同的时间参数组(TR&lt; 1&gt;,TE&lt; 1&gt;,TR&lt; 2& ,TE 2 2),并且其中,所述体模具有已知的弛豫时间值的空间分布(T 1,T 2,N 2, )。 通过比较检查对象(5)的MR图像(3,4)的图像值来确定检查对象(5)的局部弛豫时间值(T 1,T 2,2) 检查对象(5),其具有所述体模的MR图像(6,7)的图像值,并且通过将所述体模的MR图像的图像值分配给弛豫时间值(T 1>,T

    Determination of relaxation rate changes for MR molecular imaging
    14.
    发明授权
    Determination of relaxation rate changes for MR molecular imaging 有权
    确定MR分子成像的松弛率变化

    公开(公告)号:US07471085B2

    公开(公告)日:2008-12-30

    申请号:US11912686

    申请日:2006-04-13

    IPC分类号: G01V3/00

    CPC分类号: G01R33/50 G01R33/4806

    摘要: MR based molecular imaging is strongly supported by the accurate quantification of contrast agents. According to an exemplary embodiment of the present invention, a determination unit of an examination apparatus is adapted for determining an error propagation function, wherein the error propagation function is then used as a weighting function for an accurate determination Of AR2*. This leads to an improved examination result.

    摘要翻译: 基于MR的分子成像被对比剂的准确定量强烈支持。 根据本发明的示例性实施例,检查装置的确定单元适于确定误差传播函数,其中误差传播函数然后被用作加权函数,用于准确地确定AR2 *。 这导致了改进的检查结果。

    Determination Of Relaxation Rate Changes For Mr Molecular Imaging
    15.
    发明申请
    Determination Of Relaxation Rate Changes For Mr Molecular Imaging 有权
    分子成像的松弛率变化的确定

    公开(公告)号:US20080197843A1

    公开(公告)日:2008-08-21

    申请号:US11912686

    申请日:2006-04-13

    IPC分类号: G01R33/50

    CPC分类号: G01R33/50 G01R33/4806

    摘要: MR based molecular imaging is strongly supported by the accurate quantification of contrast agents. According to an exemplary embodiment of the present invention, a determination unit of an examination apparatus is adapted for determining an error propagation function, wherein the error propagation function is then used as a weighting function for an accurate determination Of AR2*. This leads to an improved examination result.

    摘要翻译: 基于MR的分子成像被对比剂的准确定量强烈支持。 根据本发明的示例性实施例,检查装置的确定单元适于确定误差传播函数,其中,误差传播函数然后用作加权函数,用于准确地确定AR < SUB> *。 这导致了改进的检查结果。

    MR method of determining local relaxation time values using calibrated phantom
    16.
    发明授权
    MR method of determining local relaxation time values using calibrated phantom 失效
    使用校准体模确定局部弛豫时间值的MR方法

    公开(公告)号:US07642775B2

    公开(公告)日:2010-01-05

    申请号:US11573897

    申请日:2005-08-19

    IPC分类号: G01V3/00

    CPC分类号: G01R33/50 G01R33/58

    摘要: An MR method determines local relaxation time values (T1, T2) of an examination object (5). First, two or more MR images (3, 4) of the examination object (5) are recorded, each with different time parameter sets (TR1, TE1, TR2, TE2) of an imaging sequence. MR images (6, 7) of a phantom are likewise recorded using the same time parameter sets (TR1, TE1, TR2, TE2) of the imaging sequence. The phantom has a known spatial distribution of relaxation time values (T1, T2). The local relaxation time values (T1, T2) of the examination object (5) are determined by comparing image values of the MR images (3, 4) of the examination object (5) with image values of the MR images (6, 7) of the phantom and by assigning image values of the MR images (6, 7) of the phantom to relaxation time values (T1, T2) according to the known spatial distribution of relaxation time values (T1, T2) of the phantom.

    摘要翻译: MR方法确定检查对象(5)的局部弛豫时间值(T1,T2)。 首先,记录检查对象(5)的两个以上的MR图像(3,4),每个具有不同的成像序列的时间参数组(TR1,TE1,TR2,TE2)。 使用成像序列的相同时间参数组(TR1,TE1,TR2,TE2)同样记录体模的MR图像(6,7)。 体模具有已知的松弛时间值(T1,T2)的空间分布。 通过将检查对象(5)的MR图像(3,4)的图像值与MR图像(6,7)的图像值进行比较来确定检查对象(5)的局部弛豫时间值(T1,T2) ),并且根据已知的体模弛豫时间值(T1,T2)的空间分布,将体模的MR图像(6,7)的图像值分配给弛豫时间值(T1,T2)。

    MR METHOD FOR SPATIALLY-RESOLVED DETERMINATION OF RELAXATION PARAMETERS
    17.
    发明申请
    MR METHOD FOR SPATIALLY-RESOLVED DETERMINATION OF RELAXATION PARAMETERS 有权
    用于空间参数确定的MR方法

    公开(公告)号:US20090232410A1

    公开(公告)日:2009-09-17

    申请号:US11908812

    申请日:2006-03-10

    IPC分类号: G06K9/40

    CPC分类号: G01R33/50

    摘要: The invention relates to an MR method for spatially resolved determination of relaxation parameters in an examination zone, comprising the steps: a. acquisition, by means of a first sequence, of MR data sets for a plurality of MR images having different echo times, b. acquisition, by means of a second sequence, of at least one further MR data set for at least one further MR image having an enhanced spatial resolution and reduced time resolution in comparison with the MR images of the first sequence, c. generation of MR combination images using an MR data set derived from the first sequence for a portion within the k-space and the MR data of a further MR data set acquired outside this portion by means of the second sequence, d. derivation of relaxation parameters from the MR combination images.

    摘要翻译: 本发明涉及一种用于空间分辨确定检查区中的松弛参数的MR方法,包括以下步骤:a。 通过第一序列获取具有不同回波时间的多个MR图像的MR数据集,b。 c。与第一序列的MR图像相比,通过第二序列获取至少一个另外的MR数据集,用于至少一个具有增强的空间分辨率和降低的时间分辨率的MR图像。 d。使用从第一序列导出的k个空间内的部分的MR数据集和通过第二序列d在该部分外部获取的另一个MR数据集的MR数据生成MR组合图像。 从MR组合图像中推导出松弛参数。