公开(公告)号：US4870363A

公开(公告)日：1989-09-26

申请号：US29016

申请日：1987-03-23

申请人： Mohamed M. Yassine ,  Bernard Querleux ,  Luc Darrasse ,  Herve Saint Jalmes ,  Jacques Taquin ,  Michel Sauzade ,  Jean-Luc Leveque

发明人： Mohamed M. Yassine ,  Bernard Querleux ,  Luc Darrasse ,  Herve Saint Jalmes ,  Jacques Taquin ,  Michel Sauzade ,  Jean-Luc Leveque

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/20 ,  G01R33/38 ,  G01R33/385

CPC分类号： G01R33/385

摘要： The apparatus (1) is constituted by: device (3) for creating a homogeneous main magnetic static field (HO) orientated along a determined direction (Oz) in which static field there is placed the body (2) to be examined; devices for creating magnetic field gradients in a space of the body to be examined along three directions of the space; radio frequency excitation device (E) and a device (R) for the detection of the nuclear magnetic resonance signals produced by the body to be examined. The one, (Dx) of the devices for creating the gradients is constituted by a unilateral system wherein the device (6) for creating the magnetic field gradient along one direction (Ox) of the space are entirely situated on one and the same side of an "open" surface (P) while the body to be examined (2) is situated on the side of the surface (P) which is opposite to that where the device (6) is located, which are capable of creating a transverse gradient in relation to the direction (Oz) of the main static field, on the side of the surface where the body ( 2) to be examined is situated. Such a device (Dx) is particularly suitable for NMR imaging of the human skin.

摘要翻译： 装置（1）由以下部分构成：装置（3），用于产生沿着确定的方向（Oz）定向的均匀主磁场（HO），其中放置待测体2的静电场; 用于沿着所述空间的三个方向在身体的空间中产生磁场梯度的装置; 射频激励装置（E）和用于检测被检体的核磁共振信号的装置（R）。 用于创建梯度的装置（Dx）由单边系统构成，其中用于产生沿空间的一个方向（Ox）的磁场梯度的装置（6）完全位于 一个“开放的”表面（P），而被检体（2）位于与设备（6）所在位置相反的表面（P）的一侧，这能够产生横向梯度 相对于主静电场的方向（Oz），在被检体2的表面侧。 这种装置（Dx）特别适用于人皮肤的NMR成像。

公开(公告)号：US20130237807A1

公开(公告)日：2013-09-12

申请号：US13817329

申请日：2011-08-16

申请人： Xavier Francois Maitre ,  Luc Darrasse ,  Ralph Sinkus ,  Charles Bruno Louis

发明人： Xavier Francois Maitre ,  Luc Darrasse ,  Ralph Sinkus ,  Charles Bruno Louis

IPC分类号： A61B5/055 ,  A61B5/00

CPC分类号： A61B5/055 ,  A61B5/0042 ,  A61B5/0044 ,  A61B5/0051 ,  A61B5/085 ,  A61B5/103 ,  A61B5/682 ,  G01R33/56358

摘要： A method and apparatus (100) for vibrating an organ and/or tissue and/or region of a subject's body (202) without a mechanical transmission to characterize at least one mechanical property of the region and/or tissue and/or organ, the apparatus (100) includes: elements (114-118) for generating a pressure wave of a given frequency in a gaseous medium, and waveguide elements (106) for guiding, in a gaseous medium, the pressure wave from the generating elements (114-118) to a human or animal body (202). Wave guiding in the airways of a human or animal body and tissue displacement mapping, anisotropy, and mechanical property characterizing systems (300) and methods are also described.

摘要翻译： 一种用于在没有机械传递的情况下振动受试者的身体（202）的器官和/或组织和/或区域以表征该区域和/或组织和/或器官的至少一种机械性质的方法和装置（100）， 装置（100）包括：用于在气体介质中产生给定频率的压力波的元件（114-118），以及用于在气体介质中引导来自发生元件（114- 118）到人或动物体（202）。 还描述了人体或动物身体气道中的波导，组织位移测绘，各向异性和机械特性表征系统（300）和方法。

公开(公告)号：US06293111B1

公开(公告)日：2001-09-25

申请号：US09527666

申请日：2000-03-17

申请人： Jean-Pierre Nacher ,  Geneviève Tastevin ,  Luc Darrasse ,  Geneviève Guillot

发明人： Jean-Pierre Nacher ,  Geneviève Tastevin ,  Luc Darrasse ,  Geneviève Guillot

IPC分类号： F25B1900

CPC分类号： G01R33/282 ,  G01N24/006 ,  Y10S62/919

摘要： A process for preparing hyperpolarized helium gas at high pressure including optical pumping at a resonant wavelength of about 1083 nanometers a helium gas formed by pure helium-3 isotope or by a mixture of helium-3 and helium-4 isotopes; and subjecting the helium gas to a magnetic field of about 0.01 to about 1 tesla during optical pumping and maintaining pressure higher than about 10 mbar and an apparatus for preparing a hyperpolarized helium gas at high pressure including a helium gas confinement cell; an excitation laser positioned to irradiate the helium gas; and means for generating a magnetic field of about 0.01 to about 1 tesla operatively connected to the confinement cell.

摘要翻译： 在高压下制备超极化氦气的方法，包括在约1083纳米的共振波长下的光泵浦，由纯氦-3同位素或氦-3和氦-4同位素的混合物形成的氦气; 并且在光泵浦期间使氦气经受约0.01至约1特斯拉的磁场并保持高于约10毫巴的压力，以及用于在包括氦气限制电池的高压下制备超极化氦气的装置; 定位成照射氦气的激发激光; 以及用于产生可操作地连接到限制电池的约0.01至约1特斯拉的磁场的装置。

公开(公告)号：US4968936A

公开(公告)日：1990-11-06

申请号：US330387

申请日：1989-03-29

申请人： Luc Darrasse ,  Olivier Ernst

发明人： Luc Darrasse ,  Olivier Ernst

IPC分类号： A61B5/055 ,  G01R33/34

CPC分类号： G01R33/34061

摘要： The present invention relates to antennas for nuclear magnetic resonance imaging devices. The antenna (10) of the invention essentially is formed of two support plates (11, 12) made of electrically insulating material. Spacers (13) hold the two plates at a fixed distance apart in two parallel planes, and releasably fixing at least one of the two plates (11) to the spacer means (13). At least first and second turns (17, 18) of electrically conductive material are fixed on respective first faces (15, 16) of the two plates in order to form two current loops substantially centered on a common axis (100) perpendicular to the faces with capacitive coupling together of the ends of each current loop. The invention is applicable to scanners, in particular for scanning the human brain.

摘要翻译： 本发明涉及用于核磁共振成像装置的天线。 本发明的天线（10）基本上由电绝缘材料制成的两个支撑板（11,12）形成。 间隔件（13）将两个板以两个平行的平面隔开固定的距离，并且将两个板（11）中的至少一个可释放地固定到间隔件装置（13）上。 导电材料的至少第一和第二匝（17,18）固定在两个板的相应的第一面（15,16）上，以便形成两个电流回路，其基本上位于垂直于面的公共轴线（100）的中心 每个电流环的端部具有电容耦合在一起。 本发明适用于扫描仪，特别是扫描人脑。