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    • 12. 发明授权
    • Dynamic frequency drift correction method in magnetic resonance imaging
    • 磁共振成像中的动态频率漂移校正方法
    • US08907673B2
    • 2014-12-09
    • US13097270
    • 2011-04-29
    • Qiang HeDe He WengXiao Dong Zhou
    • Qiang HeDe He WengXiao Dong Zhou
    • G01R33/48G01R33/565
    • G01R33/56563G01R33/4828
    • For magnetic resonance imaging (MRI), a dynamic frequency drift correction method for binomial water excitation method includes collecting the reference one-dimensional navigation signal by an MRI device; acquiring one current one-dimensional navigation signal after scanning N images, wherein N is a positive integer; calculating the frequency drift according to the reference one-dimensional navigation signal and the current one-dimensional navigation signal; calculating and setting the initial phase of the next radio frequency signal by the MRI device according to the frequency drift. The method provides real-time calculation of the main magnetic field frequency drift according to the one-dimensional navigation signal during the scanning period and corrects the phase of the radio frequency signal to ensure that the direction of the gradient field is always perpendicular to the plane formed by the spinning of fat protons, so there is only water signal remaining after excitation so that water images can be obtained.
    • 对于磁共振成像(MRI),用于二项式水激励方法的动态频率漂移校正方法包括通过MRI装置收集参考一维导航信号; 在扫描N个图像之后获取一个当前的一维导航信号,其中N是正整数; 根据参考一维导航信号和当前的一维导航信号计算频率漂移; 根据频率漂移,由MRI装置计算和设定下一个射频信号的初始相位。 该方法根据扫描周期内的一维导航信号实时计算主磁场频率漂移,校正射频信号的相位,确保梯度场方向始终垂直于平面 通过脂肪质子的旋转形成,所以在激发后只剩下水信号,从而可以获得水图像。
    • 13. 发明授权
    • Magnetic resonance imaging water-fat separation method
    • 磁共振成像水脂分离法
    • US08692551B2
    • 2014-04-08
    • US13097311
    • 2011-04-29
    • Qiang HeDe He Weng
    • Qiang HeDe He Weng
    • G01V3/00
    • A61B5/055G01R33/4824G01R33/4828
    • A magnetic resonance imaging (MRI) water-fat separation method includes acquiring in-phase image raw measurement data and out-of-phase image raw measurement data with an MRI device, reconstructing an in-phase image and an out-of-phase image according to a system matrix and the raw measurement data using the penalty function regularized iterative reconstruction method, and calculating water and fat images according to the in-phase image and the out-of-phase image. The use of the penalty function regularized iterative method eliminates the need for k-space raw measurement data with a 100% sampling rate, thereby reducing the MRI scan time, shortening the entire imaging time, and improving the efficiency of the MRI device.
    • 磁共振成像(MRI)水分离方法包括用MRI装置获取同相图像原始测量数据和异相图像原始测量数据,重建同相图像和异相图像 根据系统矩阵和使用惩罚函数正则化迭代重建方法的原始测量数据,并根据同相图像和异相图像计算水和脂肪图像。 使用惩罚函数正则化迭代方法消除了对具有100%采样率的k空间原始测量数据的需要,从而减少了MRI扫描时间,缩短了整个成像时间,并提高了MRI设备的效率。
    • 14. 发明申请
    • DYNAMIC FREQUENCY DRIFT CORRECTION METHOD IN MAGNETIC RESONANCE IMAGING
    • 动态谐波成像中的动态频率干扰校正方法
    • US20110267057A1
    • 2011-11-03
    • US13097270
    • 2011-04-29
    • Qiang HeDe He WengXiao Dong Zhou
    • Qiang HeDe He WengXiao Dong Zhou
    • G01R33/48
    • G01R33/56563G01R33/4828
    • For magnetic resonance imaging (MRI), a dynamic frequency drift correction method for binomial water excitation method includes collecting the reference one-dimensional navigation signal by an MRI device; acquiring one current one-dimensional navigation signal after scanning N images, wherein N is a positive integer; calculating the frequency drift according to the reference one-dimensional navigation signal and the current one-dimensional navigation signal; calculating and setting the initial phase of the next radio frequency signal by the MRI device according to the frequency drift. The method provides real-time calculation of the main magnetic field frequency drift according to the one-dimensional navigation signal during the scanning period and corrects the phase of the radio frequency signal to ensure that the direction of the gradient field is always perpendicular to the plane formed by the spinning of fat protons, so there is only water signal remaining after excitation so that water images can be obtained.
    • 对于磁共振成像(MRI),用于二项式水激励方法的动态频率漂移校正方法包括通过MRI装置收集参考一维导航信号; 在扫描N个图像之后获取一个当前的一维导航信号,其中N是正整数; 根据参考一维导航信号和当前的一维导航信号计算频率漂移; 根据频率漂移,由MRI装置计算和设定下一个射频信号的初始相位。 该方法根据扫描周期内的一维导航信号实时计算主磁场频率漂移,校正射频信号的相位,确保梯度场方向始终垂直于平面 通过脂肪质子的旋转形成,所以在激发后只剩下水信号,从而可以获得水图像。
    • 15. 发明申请
    • Amorphous nickel-free zirconium alloy
    • 无定形无镍锆合金
    • US20130032252A1
    • 2013-02-07
    • US13136635
    • 2011-08-04
    • Qiang HeJian Xu
    • Qiang HeJian Xu
    • C22C45/10
    • C22C45/10C22C1/002C22C1/02C22C1/03
    • An amorphous Nickel-Free Zirconium alloy which is readily formed through copper mold casting, comprising a composition consisting of four elements in which the first element is Zr, the second element is Ti, the third element is Cu and the fourth element is Al, wherein an atomic percent of the first to the fourth elements in the composition are represented by a, b, c and d respectively, wherein a=45˜69%, b=0.25˜8%, c=21˜35%, and d=7.5˜15%, where a sum of a, b, c and d is smaller than or equal to 100%. The composition of the amorphous alloy within the above range is melted in a copper mold to form bulk amorphous materials or parts which have characteristics of high tensile strength, high fracture toughness, low Young's modulus and high corrosion resistance.
    • 通过铜模铸造容易地形成的非晶态无镍锆合金,包括由第一元素为Zr的第一元素为四种元素,第二元素为Ti,第三元素为Cu,第四元素为Al的组合物,其中 组分中第一至第四元素的原子百分比分别由a,b,c和d表示,其中a = 45〜69%,b = 0.25〜8%,c = 21〜35%,d = 7.5〜15%,其中a,b,c和d的总和小于或等于100%。 将上述范围内的非晶合金的组成在铜模中熔化,形成具有高拉伸强度,高断裂韧性,低杨氏模量和高耐蚀性特征的块状无定形材料或部件。