专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明授权

US4477777A Analysis of biological material 失效
标题翻译：生物材料分析
公开(公告)号：US4477777A
公开(公告)日：1984-10-16
申请号：US389064
申请日：1982-06-16
申请人： Roy E. Gordon
发明人： Roy E. Gordon
IPC分类号： G01R33/465 , G01R33/485 , G01R33/08
CPC分类号： G01R33/465 , G01R33/485 , Y10S505/844
摘要： A method of determining or imaging fats in a non .sup.13 C enriched biological sample, particularly human tissue comprising subjecting the sample to a magnetic field, irradiating the sample with radiofrequency electromagnetic radiation, obtaining from the sample an electrical signal indicative of the radiofrequency absorption of the sample in the magnetic field at a frequency corresponding to the .sup.13 C NMR resonance frequency for --(CH.sub.2).sub.n --, filtering the signal to exclude components due to absorption by the sample attributable to carbon atoms other than those present as --(CH.sub.2).sub.n -- and determining from the intensity of the absorption the fat content of the sample, or applying to the signal an imaging technique to determine the fat distribution in the sample. .sup.1 H decoupling is preferably employed to increase signal-to-noise ratio.The method is useful in the diagnosis of certain fat-related diseases, such as muscular dystrophy.
摘要翻译：一种在非13C富集的生物样品，特别是人体组织中测定或成像脂肪的方法，包括使样品经受磁场，用射频电磁辐射照射样品，从样品获得指示样品的射频吸收的电信号在对应于 - （CH 2）n-的13 C NMR共振频率的频率下的磁场中，过滤信号以排除由归属于除了作为 - （CH 2）n存在的碳原子以外的碳原子的样品的吸收的组分，以及从吸收的强度确定样品的脂肪含量，或将信号应用于成像技术以确定样品中的脂肪分布。 1H去耦合优选地用于增加信噪比。该方法可用于诊断某些脂肪相关疾病，如肌营养不良症。

82. 发明授权

US4180769A Superconducting solenoid with compensation for axial gradients 失效
标题翻译：超导螺线管，补偿轴向梯度
公开(公告)号：US4180769A
公开(公告)日：1979-12-25
申请号：US879298
申请日：1978-02-21
申请人： Robert E. Gang
发明人： Robert E. Gang
IPC分类号： A61B10/00 , A61B5/055 , G01R33/38 , G01R33/381 , G01R33/3815 , G01R33/3875 , H01F6/00 , H01F6/06 , G01R33/08
CPC分类号： G01R33/3875 , G01R33/3815 , Y10S505/843 , Y10S505/844 , Y10S505/879
摘要： A superconducting solenoid with compensation for axial gradients of orders 1 through 7 is formed of a superconducting wire having a rectangular cross-section. The wire is wound as a solenoid having a longitudinal axis and multiple helical layers, adjacent ones of which are pitched in opposite directions. The solenoid includes a main winding portion, as well as auxiliary and supplemental winding portions at each end of the main winding portion. The auxiliary and supplemental winding portions, respectively on the interior and exterior cylindrical faces of the main windng portion, compensate for the second and fourth order gradients. A further winding portion in the center of the main winding portion, on the interior cylindrical face thereof, compensates for sixth order axial gradients. The odd order gradients are compensated because each of the winding portions have approximately an equal number of turns on opposite sides of a centrally located transverse axis of the main winding portion.
摘要翻译：具有1至7号轴向梯度补偿的超导螺线管由具有矩形横截面的超导线形成。线缠绕成具有纵向轴线和多个螺旋层的螺线管，其相邻的螺旋层在相反方向上倾斜。螺线管包括主绕组部分，以及在主绕组部分的每个端部处的辅助和补充绕组部分。分别在主风口部分的内外圆柱面上的辅助和补充卷绕部分补偿第二和第四阶梯度。在主绕组部分的中心处的另一个卷绕部分在其内圆柱面上补偿六阶轴向梯度。由于每个绕组部分在主绕组部分的位于中心的横向轴线的相对侧上具有大致相等的匝数，所以补偿了奇数阶梯度。

83. 发明授权

US31895A Mode of attaching- clothes-wriwgeks to tubs 失效
公开(公告)号：US31895A
公开(公告)日：1861-04-02
申请号：US31895D
CPC分类号： D06F45/16 , Y10S505/844

84. 发明公开

EP0673043A1 Superconducting lead assembly for a cryocooler-cooled superconducting magnet 失效
标题翻译： SupraleitendeZuführungfüreinentieftemperaturgekühltensupraleitenden Magnet。
公开(公告)号：EP0673043A1
公开(公告)日：1995-09-20
申请号：EP95301498.2
申请日：1995-03-08
申请人： GENERAL ELECTRIC COMPANY
发明人： Herd, Kenneth Gordon , Laskaris, Evangelos Trifon , Thompson, Paul Shadforth
IPC分类号： H01F6/06 , H01F6/02 , F17C13/00
CPC分类号： H01F6/065 , Y10S505/844 , Y10S505/879 , Y10S505/893
摘要： A superconducting magnet lead assembly for a cryocooler-cooled superconducting magnet having a design current of between generally 50 and 250 amperes. A DBCO (Dysprosium Barium Copper Oxide), YBCO (Yttrium Barium Copper Oxide), or BSCCO (Bismuth Strontium Calcium Carbonate) superconducting lead has its ends flexibly, dielectrically, and thermally connected, one end to the generally 30 to 50 Kelvin first stage and the other end to the generally 8 to 30 Kelvin second stage of the cryocooler coldhead. The superconducting lead has a generally constant cross-sectional area along its length. The design current, the lead's length, and the lead's cross-sectional area are chosen such that the design current times the lead's length divided by the lead's cross-sectional area is between generally 720 and 880 amperes per centimeter for a DBCO or YBCO lead and is between generally 180 and 220 amperes per centimeter for a BSCCO lead. The superconducting lead will not itself precipitate a magnet quench (i.e., the superconducting lead does not conduct significant heat between the coldhead stages during the superconductive mode), and the superconducting lead will survive a lead quench from other causes (i.e., the superconducting lead does conduct the resistive heat buildup to the coldhead stages during a lead quench) and thus be acceptable for commercial applications.
摘要翻译：一种用于低温冷却超导磁体的超导磁体引线组件，其具有通常为50和250安培之间的设计电流。 DBCO（氧化镝钡氧化物），YBCO（钇钡氧化铜）或BSCCO（铋锶钙氧化铜）超导导线的端部灵活，介电和热连接，一端通常为30至50开尔文第一级另一端通常是低温冷冻机的8〜30开尔文第二阶段。超导引线沿其长度具有大致恒定的横截面积。选择设计电流，引线长度和引线的横截面积，使得引线长度除以引线横截面积的设计电流乘以DBCO或YBCO引线的通常为720至880安培/厘米，对于BSCCO铅，通常在每厘米180和220安培之间。超导引线本身不会沉淀出磁体淬火（即，超导引线在超导模式下在冷端级之间不会产生显着的热），并且超导引线将从其他原因引发淬火（即，超导引线在铅淬火期间对冷头阶段进行电阻积热），因此对于商业应用是可以接受的。

85. 发明授权

EP0171741B1 NMR Spectroscopy body probes with at least one surface coil 失效
标题翻译：具有至少一个表面线圈的NMR光谱体系探针
公开(公告)号：EP0171741B1
公开(公告)日：1991-07-17
申请号：EP85109903.6
申请日：1985-08-06
申请人： GENERAL ELECTRIC COMPANY
发明人： Bottomley, Paul Arthur
IPC分类号： G01R33/34 , G01R33/36
CPC分类号： G01R33/3635 , G01R33/34007 , G01R33/341 , G01R33/3415 , G01R33/422 , G01R33/4831 , Y10S505/844

86. 发明授权

EP0120927B1 NMR IMAGING APPARATUS 失效
标题翻译： NMR成像装置
公开(公告)号：EP0120927B1
公开(公告)日：1990-12-27
申请号：EP83903331.3
申请日：1983-09-23
申请人： E.I. DU PONT DE NEMOURS AND COMPANY
发明人： LEE, Denny, L.Y. , HAY, Robert, Duncan
IPC分类号： G01R33/24 , G01N24/08 , A61B5/055
CPC分类号： G01R33/383 , Y10S505/844
摘要： An NMR imaging apparatus (10) having a desired imaging volume for imaging of biological tissue, said apparatus comprising bias means (20) for generating a bias field, means for generating gradient fields, and radio frequency means for applying a pulse of electromagnetic radiation to the biological tissue and for detecting the resultant signals emitted from said tissue; wherein said bias means comprises a plurality of dipole ring magnets, (20) each dipole ring magnet comprising a plurality of segments, (22) each segment comprising an oriented, anisotropic permanent magnet material (23) arranged in a ring so that there is a substantially continuous ring of permanent magnet material; wherein the inner radius of at least one dipole ring magnet is different from the inner radius of an adjacent dipole ring magnet.

87. 发明授权

EP0175789B1 THERMAL BARRIER FOR VARIABLE TEMPERATURE NMR 失效
标题翻译：用于可变温度NMR的热障
公开(公告)号：EP0175789B1
公开(公告)日：1989-05-31
申请号：EP85902724.5
申请日：1985-02-19
申请人： VARIAN ASSOCIATES, INC.
发明人： LAUDERMILCH, John, R.
IPC分类号： G01N24/04 , G01R33/24
CPC分类号： G01R33/31 , Y10S505/844
摘要： An NMR system for obtaining high resolution spectroscopic measurements at a selected temperature includes gradient correcting means (40) disposed in proximity to an NMR probe (32), for imposing desired gradients on the volume occupied by the sample (35) within the probe (32). A heat exchange gas is impelled through a heat exchanger (33) and then surrounds the sample (35) to bring the sample (35) to the desired temperature. A thermal barrier (72), innocuous to RF excitation and of relatively low magnetic susceptibility protects the gradient correcting means (40) from drift due to heat exchange with the heat exchanging gas.

88. 发明公开

EP0299325A1 Aktiv geschirmter, supraleitender Magnet eines Kernspin-Tomographen 失效
标题翻译： Aktiv geschirmter，supraleitender Magnet eines Kernspin-Tomographen。
公开(公告)号：EP0299325A1
公开(公告)日：1989-01-18
申请号：EP88110664.5
申请日：1988-07-04
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： Reichert, Thomas, Dipl.-Phys.
IPC分类号： H02H7/00 , H01F7/22
CPC分类号： H02H7/001 , H01F6/006 , Y02E40/68 , Y10S336/01 , Y10S505/844 , Y10S505/879 , Y10S505/88
摘要： Das innere (1a) und äußere Spulensystem (1b) eines aktiv geschirmten, supraleitenden Magneten eines Kernspin-Tomographen werden in Serie geschaltet, um beim Quench eines Spulensystems (1a,1b) ein erhöhtes Streufeld zu vermeiden. Dadurch werden äußere Magnetfeldstörungen nicht mehr vom Inneren des Spulensystems (1) abgeschirmt. Aufgabe der Erfindung ist es, einerseits beim Quench des inneren (1a) oder es äußeren Spulensystems (1b) ein erhöhtes Streufeld zu vermeiden, andererseits im Normalbetrieb äußere, zeit-lich veränderliche Magnetfelder vom Inneren des Spulensystems (1) abzuschirmen.
Bei dem erfindungsgemäßen aktiv geschirmten, supraleitenden Spulensystem (1) wird ein supraleitender Strombegrenzer (2) mit geringer kritischer Stromtragfähigkeit in das Spulensystem (1) geschaltet zum Führen eines Differenzstromes zwischen innerem (1a) und äußerem Spulensystem (1b). Dadurch bleibt die Abschirmwirkung gegen äußere Magnetfeldstörungen erhalten. Um im Quenchfall eine unzulässige Erhöhung des Streufeldes zu vermeiden, wird der Strombegrenzer (2) bei Überschreiten einer vorgegebenen Stromdifferenz normalleitend und begrenzt damit die Stromdifferenz zwischen innerem (1a) und äußerem Spulensystem (1b).
摘要翻译：为了避免在对线圈系统（1a，1b）进行淬火时增加的散射场，磁共振成像器的主动屏蔽的超导磁体的内部（1a）和外部线圈系统（1b）串联连接。结果，外部磁场干扰不再从线圈系统（1）的内部屏蔽。本发明的一个目的是为了避免在淬火内部（1a）或外部线圈系统（1b）时增加的散射场，另一方面，从外部线圈系统（1b）屏蔽外部时间可变的磁场，线圈系统（1）的内部正常运行。在根据本发明的主动屏蔽的超导线圈系统（1）中，具有低临界电流容量的超导限流器（2）连接到线圈系统（1）中以承载内部（1a）和外部线圈系统（1b）之间的差动电流。因此，保持了对外部磁场干扰的屏蔽效果。为了避免在淬火的情况下散射场的不可接受的增加，当超过预定的电流差时，限流器（2）变得通常导通，因此限制了内部（1a）和外部线圈系统之间的电流差（图1b）。 ... ...

89. 发明公开

EP0210562A3 Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging 失效
标题翻译：在核磁共振成像中覆盖瞬态磁场非均质的方法
公开(公告)号：EP0210562A3
公开(公告)日：1987-09-09
申请号：EP86109943
申请日：1986-07-19
申请人： GENERAL ELECTRIC COMPANY
发明人： Bottomley, Paul Arthur
IPC分类号： G01N24/08
CPC分类号： G01R33/482 , G01R33/385 , G01R33/56518 , Y10S505/844
摘要： Methods for overcoming transient magnetic field gradient inhomogeneity in a nuclear magnetic resonance imaging and/or nuclear magnetic resonance spectroscopic imaging system, wherein the inhomogeneities are induced by the pulsed magnetic field gradients utilized in the imaging process itself, provide at least one correction pulse signal during, or after, any application of the desired magnetic field to the sample-to-be-investigated in the system. At least one of the pulse signal characteristics is adjusted to oppose and sub- etantially cancel an error-producing portion of the total magnetic field gradient in a particular direction. The magnetic field gradient correction signal(s) can be applied: during a non- asiective RF pulse; immediately subsequent to an initial gradient field application (either alone or coincident with a select i ve 180° RF pulse); during acquisition of response signal data; or at anytime to correct for inter-gradient cross-talk conditions.
摘要翻译：用于克服核磁共振成像和/或核磁共振光谱成像系统中的瞬态磁场梯度不均匀性的方法，其中所述不均匀性由在成像过程本身中使用的脉冲磁场梯度引起，在至少一个校正脉冲信号期间提供至少一个校正脉冲信号或之后，将所需磁场的任何应用应用于在系统中要被研究的样品。脉冲信号特性中的至少一个被调整为与特定方向上的总磁场梯度的误差产生部分相对并且基本上消除。可以应用磁场梯度校正信号：在非选择性RF脉冲期间; 紧随着初始梯度场施加（单独或与选择性180°RF脉冲一致）; 在获取响应信号数据期间; 或在任何时候纠正梯级间串扰条件。

90. 发明授权

EP0094734B1 Capacitively shortened coaxial resonators for nuclear magnetic resonance signal reception 失效
标题翻译：用于核磁共振信号接收的电容式松弛同轴共振器
公开(公告)号：EP0094734B1
公开(公告)日：1987-01-21
申请号：EP83301171.1
申请日：1983-03-04
申请人： The University of South Carolina
发明人： Doty, Françis David
IPC分类号： G01N24/04
CPC分类号： G01R33/34046 , G01R33/307 , G01R33/34007 , G01R33/34092 , G01R33/345 , G01R33/3628 , G01R33/56536 , Y10S505/844 , Y10S505/866

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式