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    • 11. 发明授权
    • Method for recording the nuclear magnetic resonance for use in VNMR
tomography
    • 记录用于VNMR层析成像的核磁共振的方法
    • US4694249A
    • 1987-09-15
    • US815118
    • 1985-12-27
    • Hans PostDieter RatzelPeter BrunnerBertold Knuttel
    • Hans PostDieter RatzelPeter BrunnerBertold Knuttel
    • A61B10/00A61B5/055G01R33/48G01R33/50G01R33/20
    • A61B5/055G01R33/50
    • For recording the nuclear magnetic resonance in selected areas of a body for the purpose of representing body cross-sections in the form of images (NMR tomography), wherein the nuclear spins of a selected type present in the area of one plane of the body are subjected to a superimposed gradient field varying in the selected cross-sectional plane, and selectively excited, the excitation of the nuclear spins is effected by application of a pulse sequence which induces the nuclear spins to supply at one stage a number of chronologically successive induction signals. The induction signals corresponding to each other in chronolical sequence are then processed to obtain separate sets of image signals so that by one single measurement a sequence of cross-sectional images is obtained which differ from each other by the intensity of the excited nuclear spins which varies according to the relaxation times T.sub.1 or T.sub.2. The fact that all images have been obtained by one and the same measurement provides the possibility to determine the relaxation times T.sub.1 and/or T.sub.2 related to the individual image points and to use them on the one hand for purposes of selective image representation and, on the other hand, for improving the image quality.
    • 为了在身体的选定区域记录核磁共振,用于以图像形式(NMR层析成像)来表示身体横截面,其中存在于身体的一个平面区域中的选定类型的核自旋是 经受在所选截面中变化的叠加梯度场,并且选择性地激发,核自旋的激发通过施加脉冲序列来实现,该脉冲序列诱导核自旋在一个阶段提供多个时间顺序的感应信号 。 然后处理按时间序列相互对应的感应信号以获得单独的图像信号组,使得通过一次单次测量,获得横截面图像序列,所述序列彼此不同,所述激发的核自旋的强度随着变化 根据弛豫时间T1或T2。 所有图像都通过一个相同的测量获得的事实提供了确定与各个图像点相关的弛豫时间T1和/或T2的可能性,并且一方面为了选择性图像表示的目的使用它们,并且在 另一方面,为了提高图像质量。
    • 12. 发明授权
    • Method for measuring the nuclear magnetic resonance
    • 测量核磁共振的方法
    • US4558277A
    • 1985-12-10
    • US474555
    • 1983-03-11
    • Hans PostDieter RatzelPeter Brunner
    • Hans PostDieter RatzelPeter Brunner
    • A61B10/00A61B5/055G01R33/48G01R33/483G01R33/56G01N24/08
    • G01R33/4833G01R33/56
    • For the purpose of limiting NMR spectroscopy to a selected area of a body the said area is prepared by applying first a homogeneous magnetic field passing through the entire body and superimposing thereafter upon the said magnetic field a first magnetic field of identical orientation whose strength varies in a first sense (first field gradient), exciting thereafter all the selected nuclear spins present within the body and in addition, selectively, only the nuclear spins present in a first body plane containing the volume element and extending vertically to the said first field gradient so that the selected nuclear spins contained in this body plane are returned to the direction of the homogeneous magnetic field while the nuclear spins outside this plane receive an orientation differing from the sense of the homogeneous magnetic field. This process is repeated twice, using each time a different gradient field, so that thereafter only the nuclear spins located within the volume element selected by means of the three gradient fields are parallel to the homogeneous magnetic field and can be excited by means of one or more pulses to obtain an oscillation generating an induction signal.
    • 为了将NMR光谱限制到身体的选定区域,所述区域通过首先施加穿过整个身体的均匀磁场并在此之后叠加在所述磁场上来制备其强度变化的相同取向的第一磁场 第一感觉(第一场梯度),然后激发身体内存在的所有选定的核自旋,此外,选择性地仅选择存在于包含体积元素并垂直延伸到所述第一场梯度的第一体平面中的核自旋 使得包含在该体平面中的选定的核自旋返回到均匀磁场的方向,而在该平面外的核自旋接收与均匀磁场的感觉不同的取向。 该过程重复两次,每次使用不同的梯度场,使得此后只有位于通过三个梯度场选择的体积单元内的核自旋平行于均匀磁场,并且可以通过一个或 更多脉冲以获得产生感应信号的振荡。
    • 13. 发明授权
    • Pulse generator circuit
    • 脉冲发生器电路
    • US4367415A
    • 1983-01-04
    • US293650
    • 1981-08-17
    • Peter Brunner
    • Peter Brunner
    • H04B3/32H03K17/66H04B3/14H04B14/04H04L25/02H03K3/64
    • H04B3/143H03K17/667
    • A pulse generator circuit comprises a pulse source and an output line having a specific characteristic impedance and having an input and an output end, the output end being connectable to a high impedance external load and the input end being connectable to and disconnectable from said pulse source. An internal impedance being substantially equal to said characteristic impedance is provided and is connectable to and disconnectable from said input end of the output line. The input end of the output line can be alternatively connected to either the pulse source or to the internal impedance by a switching means. The switching means is controlled by control means in such a way that during delivery of pulses by said pulse source the pulse source is connected to said input end of the output line whereas said internal impedance is connected to the input end substantially during the intervals between the pulses.
    • 脉冲发生器电路包括脉冲源和具有特定特性阻抗并具有输入和输出端的输出线,输出端可连接到高阻抗外部负载,并且输入端可连接到所述脉冲源并与其断开 。 提供基本上等于所述特性阻抗的内部阻抗,并且可连接到输出线的所述输入端并与其断开。 输出线的输入端可以通过开关装置交替地连接到脉冲源或内部阻抗。 开关装置由控制装置控制,使得在由所述脉冲源传送脉冲期间,脉冲源连接到输出线的所述输入端,而所述内部阻抗基本上在输入端之间的间隔期间连接到输入端 脉冲。
    • 17. 发明申请
    • Clamp for external fixation
    • 外固定夹
    • US20060255521A1
    • 2006-11-16
    • US11318938
    • 2005-12-22
    • Peter BrunnerMarcel Fuhrer
    • Peter BrunnerMarcel Fuhrer
    • B25B1/00
    • A61B17/645A61B17/6466
    • A device for detachably clamping fastening elements in a surgical fixing or repositioning device. The device may a rod with a longitudinal axis. A first and second pair of clamping jaws may be operably associated with the rod. Each pair of clamping jaws may have a side surface as well as an inner clamping jaw and an outer clamping jaw, which may have indentations forming a channel. The channels may be opened towards the side surface of the clamping jaws. A fastening means may be positioned in the channels by pushing the fastening means into the openings in the side surface in a direction which may be at an angle with respect to the longitudinal axis of the rod. An elastic element may be positioned between the inner and outer clamping jaws of at least one pair of clamping jaws so as to resist movement of the inner and outer clamping jaws with respect to each other as a fastening means is inserted therebetween. A clamping element may engage the rod and may be used to fix the orientation of the clamping jaws and fastening means with respect to each other.
    • 一种用于将紧固元件可拆卸地夹紧在手术固定或重新定位装置中的装置。 该装置可以是具有纵向轴线的杆。 第一和第二对夹钳可以与杆可操作地相关联。 每对夹爪可具有侧表面以及内夹爪和外夹钳,其可具有形成通道的凹陷。 通道可以朝向夹爪的侧表面打开。 可以通过将紧固装置沿相对于杆的纵向轴线成一定角度的方向将紧固装置推入侧表面中的开口中而将紧固装置定位在通道中。 弹性元件可以位于至少一对夹爪的内夹爪和外夹爪之间,以便当紧固装置插入其间时,能够防止内夹爪与外夹爪相对于彼此移动。 夹紧元件可以接合杆,并且可以用于固定夹爪和紧固装置相对于彼此的取向。
    • 18. 发明授权
    • Method for determining moving material in a body
    • 用于确定身体中的移动材料的方法
    • US5240001A
    • 1993-08-31
    • US616034
    • 1990-11-20
    • Marcel MuriJurgen HennigPeter Brunner
    • Marcel MuriJurgen HennigPeter Brunner
    • G01R33/561G01R33/563
    • G01R33/56308G01R33/56316
    • For determining flowing material within a body by NMR tomography, a disk-shaped area in the body is excited, whereafter one applies a flow phase gradient directed in the same sense as the selection gradient (1) and comprising two successive, inversely identical sections (3,4) whose values are varied for the successive excitations. The echo signals obtained, which originate substantially from moving material, are received at a reading gradient directed perpendicularly to the selection gradient. 2DFT reconstruction of a set of spin echo signals furnishes an image which contains the spatial coordinate of the reading gradient in one direction and the flow speed of the material flowing in a direction perpendicular to the excited area in the second direction.
    • 为了通过NMR层析成像来确定身体内的流动物质,激发身体中的盘状区域,然后应用与选择梯度(1)相同意义的流动相位梯度,并且包括两个连续的,相反相同的部分 3,4)其值对于连续的激发而变化。 获得的基本上从移动材料获得的回波信号以垂直于选择梯度的读取梯度被接收。 一组自旋回波信号的2DFT重建提供包含一个方向上的读取梯度的空间坐标的图像以及沿与第二方向上的激励区域垂直的方向流动的材料的流速。