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    • 9. 发明申请
    • MAGNETIC RESONANCE IMAGING DEVICE AND ANGIOGRAPHY USING SAME
    • 磁共振成像装置及其使用方法
    • US20130307537A1
    • 2013-11-21
    • US13981567
    • 2012-01-26
    • Nobuyuki YoshizawaShinji Kurokawa
    • Nobuyuki YoshizawaShinji Kurokawa
    • G01R33/54
    • G01R33/54G01R33/4822G01R33/4826G01R33/543G01R33/5617G01R33/5635G01R33/5673
    • In the non-contrast 3D angiography, degradation of image quality caused by change of the cardiac cycle and degradation of image quality depending on the blood flow direction are prevented to provide an MRA image of favorable image quality, which is useful for diagnosis. A pulse sequence of the multi echo type for performing sampling of three-dimensional k-space data in a circular or elliptical shape is employed as the imaging sequence, and gated imaging based on body motion information is performed. Heart rate is monitored during the imaging, delay time DT from a gating signal and data acquisition time AT determined according to the cardiac cycle are calculated, and according to these imaging parameters, sampling trajectory and echo train number of the circular sampling are controlled.
    • 在非对比度3D血管造影中,防止由心脏周期的变化引起的图像质量的劣化和根据血液流动方向的图像质量的劣化,以提供有利于诊断的良好图像质量的MRA图像。 采用用于进行圆形或椭圆形三维k空间数据采样的多回波类型的脉冲序列作为成像序列,并且执行基于身体运动信息的门控成像。 在成像期间监测心率,计算来自门控信号的延迟时间DT和根据心动周期确定的数据获取时间AT,并且根据这些成像参数,控制循环采样的采样轨迹和回波序列号。