公开(公告)号：US20150094562A1

公开(公告)日：2015-04-02

申请号：US14043220

申请日：2013-10-01

Applicant: General Electric Company

Inventor： Christopher Judson Hardy ,  Glenn Scott Slavin ,  Jeffrey Alan Stainsby ,  Martin Andreas Janich

IPC: G01R33/567 ,  A61B5/055 ,  G01R33/48

CPC classification number: G01R33/5673 ,  A61B5/0205 ,  A61B5/0402 ,  A61B5/055 ,  A61B5/7285 ,  G01R33/5602 ,  G01R33/5607

Abstract: A magnetic field may be applied to a subject having a plurality of tissues, including first and second tissues, causing a net longitudinal magnetization in the tissues. An inversion radio frequency pulse may be generated to invert the longitudinal magnetization from the tissues. Heart-rate timing information associated with a current ECG of the subject may be measured, and an inversion time TI may be dynamically calculated based at least in part on the heart-rate timing information. An excitation radio frequency pulse may then be generated. The generation of the excitation radio frequency pulse may occur a period of time after the generation of the inversion radio frequency pulse, and the period of time may be based on the dynamically calculated inversion time TI. Magnetic resonance imaging data may then be acquired.

Abstract translation: 可以向具有多个组织的对象施加磁场，包括第一和第二组织，从而在组织中产生净纵向磁化强度。 可以产生反转射频脉冲以反转来自组织的纵向磁化强度。 可以测量与对象的当前ECG相关联的心率定时信息，并且可以至少部分地基于心率定时信息动态地计算反转时间TI。 然后可以产生激发射频脉冲。 激发射频脉冲的产生可以在产生反向射频脉冲之后的一段时间内发生，并且该时间段可以基于动态计算的反转时间TI。 然后可以获取磁共振成像数据。