Method for magnetic resonance imaging using stimulus induced rotary saturation with a contrast agent
    8.
    发明授权
    Method for magnetic resonance imaging using stimulus induced rotary saturation with a contrast agent 有权
    使用刺激诱导旋转饱和造影剂的磁共振成像方法

    公开(公告)号:US08849372B2

    公开(公告)日:2014-09-30

    申请号:US12276082

    申请日:2008-11-21

    摘要: A method and system for producing an image of a subject with a magnetic resonance imaging (MRI) system, in which the presence of a contrast agent is detected using a spin-lock pulse sequence, is described. More specifically, a contrast agent that induces saturation of magnetic resonance signals responsive to a spin-lock condition is administered to a subject. A spin-lock condition is subsequently established to saturate spins in proximity to the contrast agent. Image data is then acquired with an imaging pulse sequence and images indicative of the presence of the contrast agent are reconstructed.

    摘要翻译: 描述了使用磁共振成像(MRI)系统产生受试者的图像的方法和系统,其中使用自旋锁定脉冲序列检测造影剂的存在。 更具体地,对受试者施用引起响应于自旋锁定状态的磁共振信号饱和的造影剂。 随后建立自旋锁定条件以使造影剂附近的旋转饱和。 然后用成像脉冲序列获取图像数据,并且重构指示造影剂的存在的图像。

    STIMULUS INDUCED ROTARY SATURATION FOR MAGNETIC RESONANCE FUNCTIONAL IMAGING
    10.
    发明申请
    STIMULUS INDUCED ROTARY SATURATION FOR MAGNETIC RESONANCE FUNCTIONAL IMAGING 有权
    用于磁共振功能成像的刺激感应旋转饱和度

    公开(公告)号:US20080281183A1

    公开(公告)日:2008-11-13

    申请号:US11944062

    申请日:2007-11-21

    IPC分类号: A61B5/055

    摘要: Spin-lock T1ρ-weighted images of a subject are acquired and processed to produce an image that is indicative of bioelectromagnetic activity in the subject. A spin-lock RF field B1ρ is produced such that the Larmor frequency in the rotating frame corresponds to the expected frequency of the bioelectromagnetic activity. As a result, the magnetic field fluctuations generated by the bioelectromagnetic currents shorten the T1ρ of the surrounding tissue, creating a contrast mechanism that is seen as a reduced MR signal in the T1ρ-weighted image that is produced.

    摘要翻译: 获取并处理受试者的自旋锁定1/2加权图像以产生指示受试者中的生物电磁活动的图像。 产生自旋锁定RF场B1πhoho,使得旋转帧中的拉莫尔频率对应于生物电磁活动的预期频率。 结果,由生物电磁流产生的磁场波动缩短了周围组织的T 1 / L 2,从而产生一个对比度机制,被视为T 1 / 生成的SUB>加权图像。