公开(公告)号：EP1998185A1

公开(公告)日：2008-12-03

申请号：EP08103693.1

申请日：2008-04-23

申请人： Stelar S.r.l.

发明人： CANINA, Davide ,  SYKORA, Stanislav ,  FERRANTE, Gianni ,  MARTINI, Giuseppe ,  GOLZI, Paolo

IPC分类号： G01R33/50

CPC分类号： G01R33/50

摘要： A method has been conceived for acquisition and accumulation of a magnetic resonance signal in the presence of signal instability due to field or frequency instability. After submitting an element to be examined to a suitable experiment, a sequence of pulses for example, for measurement of an echo signal (Hahn-echo experiment), the detected signal for each τ is broken up into its Cartesian co-ordinates in an IQ plane, the module of the components is calculated and then the calculated modules are added to each other.
By operating on the sum of the calculated modules for each τ in order to at least partly remove the introduced noise, interpolation of the calculated points can be carried out so as to determine a course representative of the acquired and accumulated parameter as a function of τ.

摘要翻译： 在存在由于场或频率不稳定性引起的信号不稳定性的情况下，已经考虑了用于采集和累积磁共振信号的方法。 在将要检查的元件提交到合适的实验之后，例如用于测量回波信号（Hahn-echo实验）的脉冲序列，每个Ä的检测信号被分解成其在IQ中的笛卡尔坐标 平面，计算组件的模块，然后将计算出的模块相加。 通过对每个Ä计算的模块的总和进行操作，以便至少部分地去除引入的噪声，可以执行计算的点的内插，以便确定表示所获取和累积参数的路线作为Ä的函数 。

公开(公告)号：EP4246166A1

公开(公告)日：2023-09-20

申请号：EP22305315.8

申请日：2022-03-17

申请人： Centre national de la recherche scientifique ,  Université de Bordeaux ,  Pure Device GmbH ,  Stelar S.r.l. ,  Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： MIRAUX, Sylvain ,  FRANCONI, Jean-Michel ,  MASSOT. Philippe ,  FIDLER, Florian ,  WINTZHEIMER, Stefan ,  FERRANTE, Gianni

IPC分类号： G01R33/38 ,  G01R33/44 ,  G01R33/60

摘要： A low field MRI instrumental system (1) comprises : an electromagnetic Radio Frequency antenna (10) to emit RF pulses for inducing Electron Paramagnetic Resonance ; an electromagnetic Low Frequency antenna (20) for measurements, to emit LF pulses for inducing Nuclear Magnetic Resonance, respectively to receive LF signal produce by NMR; a gradient generator (30), to create a gradient in a static magnetic field generated during measurements; a high field generator (40) to generate a strong pre-polarization magnetic field for magnetic pre-polarization; and, a control/command unit (60). This low field MRI instrumental system (1) is characterized in that it further comprises a low field unit (50) to generate a low static magnetic field whose direction is adjustable along the three directions X, Y and Z of a fixed reference frame associated with the low field MRI instrumental system.