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31. 发明专利

JPS61230052A HIGH-FREQUENCY COIL FOR NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPS61230052A
公开(公告)日：1986-10-14
申请号：JP7143285
申请日：1985-04-03
申请人： ASAHI CHEMICAL IND
发明人： IRIGUCHI NORIO , YAMAI SATOSHI
IPC分类号： G01R33/32 , A61B5/055 , A61B10/00 , G01R33/34 , G01R33/343 , H01F5/00
摘要： PURPOSE:To make possible the generation of a high-frequency electromagnetic wave having excellent special uniformity by coupling capacitively the 1st and 2nd conductor pairs which are disposed parallel and symmetrically to a pair of annular conductors at both ends thereof. CONSTITUTION:The annular conductors 1, 2 are disposed symmetrically with the plane perpendicular to the same axial line CL. The conductors 3-6 are capacitively coupled at both ends to the annular conductors 12 via dielectric layers 7, 8 by the straight conductors parallel with the axial line CL. The current from a terminal 9 is bisected to the conductors 4, 6 by an input high-frequency signal and flows to the annular conductor 2 side through the conductors 4, 6 as shown by an arrow. The current is passed through the annular conductor 2 toward the conductors 5, 3 by the capacitive coupling and is passed further through the conductors 5, 3 as shown by the arrow toward the annular conductor 1 side by the capacitive coupling. These currents are passed through the annular conductor 1 by the capacitive coupling so as to arrive at a terminal 10. The distribution of the magnetic lines of force generated in this stage is such that the greater part of the magnetic lines of force are perpendicular to the axial line CL and are parallel with the arranging direction of the conductors 4, 6 and are approximately uniformly distributed in the space enclosed by the conductors 3-6.

32. 发明专利

GB2604131A8 MRI systems and RF transmit antenna arrangements 未知
公开(公告)号：GB2604131A8
公开(公告)日：2022-09-07
申请号：GB202102685
申请日：2021-02-25
申请人： TESLA DYNAMIC COILS BV , UMC UTRECHT HOLDING BV , FUTURA COMPOSITES B V
发明人： CAREL COSTIJN VAN LEEUWEN , ALEXANDER JAN EBERHARD RAAIJMAKERS , BART ROMKE STEENSMA , MARTINO BORGO , CATALINA SOFIA ARTEAGA DE CASTRO , CORNELIS ANTONIUS THEODORUS VAN DEN BERG , DENNIS WILHELMUS JOHANNES KLOMP
IPC分类号： G01R33/34 , G01R33/341 , G01R33/343 , G01R33/345 , H01Q9/22
摘要： An MRI system RF transmit antenna 5 comprises: a length of coaxial cable 51 with an electrically conductive core 52 and an electrically conductive outer shield 53 through which the core runs, with the core having a feed point 52a arranged for electrical connection to an RF source; and at least one break 53a provided in the electrically conductive outer shield part way along the length of coaxial cable to divide the shield into axially spaced shield portions 51a, 51b, such that at least one of the shield portions acts as a radiating element when an RF source is connected to the feed point. The feed point may be at a midpoint of the cable to form a dipole antenna, or at the end to form a monopole. An inductor 54a, 54b may be coupled between the shield and core for tuning.

33. 发明专利

GB2604131A MRI systems and RF transmit antenna arrangements 未知
公开(公告)号：GB2604131A
公开(公告)日：2022-08-31
申请号：GB202102685
申请日：2021-02-25
申请人： TESLA DYNAMIC COILS BV , UMC UTRECHT HOLDING BV , FUTARA COMPOSITES B V
发明人： CAREL COSTIJN VAN LEEUWEN , ALEXANDER JAN EBERHARD RAAIJMAKERS , BART ROMKE STEENSMA , MARTINO BORGO , CATALINA SOFIA ARTEAGA DE CASTRO , CORNELIS ANTONIUS THEODORUS VAN DEN BERG , DENNIS WILHELMUS JOHANNES KLOMP
IPC分类号： G01R33/34 , G01R33/341 , G01R33/343 , G01R33/345 , H01Q9/22
摘要： An MRI system RF transmit antenna 5 comprises: a length of coaxial cable 51 with an electrically conductive core 52 and an electrically conductive outer shield 53 through which the core runs, with the core having a feed point 52a arranged for electrical connection to an RF source; and at least one break 53a provided in the electrically conductive outer shield part way along the length of coaxial cable to divide the shield into axially spaced shield portions 51a, 51b, such that at least one of the shield portions acts as a radiating element when an RF source is connected to the feed point. The feed point may be at a midpoint of the cable to form a dipole antenna, or at the end to form a monopole. An inductor 54a, 54b may be coupled between the shield and core for tuning.

34. 发明专利

GB2454784A NMR Resonator 未知
公开(公告)号：GB2454784A
公开(公告)日：2009-05-20
申请号：GB0820587
申请日：2008-11-11
申请人： BRUKER BIOSPIN GMBH
发明人： MAIER DIETHER , MAIXNER MICHAEL
IPC分类号： G01R33/343
摘要： A nuclear magnetic resonance (NMR) resonator (1; 31) including an inductive section (6) and a capacitive section (6a). The inductive section (6) is band-shaped and surrounds a cylindrical volume under investigation (5), and the capacitive section (6a) is formed from one or more discrete capacitor(s) (13; 13a, 13b, 13c, 13d). There are through-connections (10) in the area of the inner end (7) of the band-shaped inductive section (6) so the outer coating (4) can be connected in the area of the outer end (8) to the inner coating (3) in the area of the inner end (7) via one or more capacitor(s) of the capacitive section. The inductive section (6) is formed from a dielectric flexible foil (2) which is conductively coated on both sides and the ends (7, 8) of the band-shaped inductive section (6) overlap. The NMR resonator for low-resolution NMR has a simple construction and provides NMR measurements of improved quality at low resonance frequencies, especially for Carbon 13.

35. 发明专利

DE102006056064A1 Probe head for e.g. measuring magnetic resonance in probe, has slots of cylindrical wall provided narrowly in proportion to wavelength of microwave field, where slots define loop gap resonator vibratory with core resonance frequency 未知
公开(公告)号：DE102006056064A1
公开(公告)日：2008-05-29
申请号：DE102006056064
申请日：2006-11-21
申请人： BRUKER BIOSPIN GMBH
发明人： ENGELKE FRANK , KRAHN ALEXANDER , HOEFER PETER
IPC分类号： G01R33/30 , G01N24/10 , G01R33/343
摘要： The probe head (10) has a resonance system including a probe (24) vibratory for a core resonance frequency and for an electron resonance frequency. The resonance system is formed as a hollow space resonator (12) vibratory with the electron resonance frequency. A cylindrical wall (14) of the resonator is provided with slots (16), where the slots run parallel to a wall current of a microwave field. The slots are provided narrowly in proportion to a wavelength of the microwave field. The slots in the wall define a loop-gap-resonator vibratory with the core resonance frequency.

36. 发明专利

DE69636396T2 未知
公开(公告)号：DE69636396T2
公开(公告)日：2007-09-27
申请号：DE69636396
申请日：1996-06-03
申请人： BRUKER BIOSPIN AG
发明人： BREY WILLIAM W , ANDERSON WESTON A , WONG WAI HA , FUKS LUIZ FELIPE , KOTSUBO VINCENT Y , WITHERS RICHARD S
IPC分类号： G01R33/34 , G01R33/343 , G01R33/36 , G01R33/56 , H01G4/40
摘要： A method for making an NMR probe coil (90) comprises:(a) depositing a conductive film on a substrate;(b) patterning the film to form a coil having an inductive element and a capacitive element wherein the coil has an expected resonant frequency less than a desired resonant frequency of the coil;(c) coupling RF power to the coil at or near the expected resonant frequency;(d) measuring a first observed resonant frequency of the coil;(e) increasing the RF power to the coil at or near its observed resonant frequency;(f) observing the coil for a change in the resonant frequency to a new observed resonant frequency;(g) repeating the increasing the RF power to the coil at or near the observed resonant frequency until a desired power to the coil is reached; and(h) tuning the coil by removing a portion of the capacitive element.This provides a method for making a thin-film oxide superconductor NMR probe coil resistant to frequency shifts due to conductor burn out at operating currents.

37. 发明专利

DE69633417D1 未知
公开(公告)号：DE69633417D1
公开(公告)日：2004-10-21
申请号：DE69633417
申请日：1996-06-03
申请人： BRUKER BIOSPIN AG FAELLANDEN
发明人： BREY WILLIAM W , ANDERSON WESTON A , WONG WAI HA , FUKS LUIZ FILIPE , KOTSUBO VINCENT Y , WITHERS RICHARD S
IPC分类号： G01R33/343 , G01R33/34 , G01R33/36 , G01R33/56 , H01G4/40 , H01G4/00 , H01G4/012
摘要： A method for making an NMR probe coil (90) comprises:(a) depositing a conductive film on a substrate;(b) patterning the film to form a coil having an inductive element and a capacitive element wherein the coil has an expected resonant frequency less than a desired resonant frequency of the coil;(c) coupling RF power to the coil at or near the expected resonant frequency;(d) measuring a first observed resonant frequency of the coil;(e) increasing the RF power to the coil at or near its observed resonant frequency;(f) observing the coil for a change in the resonant frequency to a new observed resonant frequency;(g) repeating the increasing the RF power to the coil at or near the observed resonant frequency until a desired power to the coil is reached; and(h) tuning the coil by removing a portion of the capacitive element.This provides a method for making a thin-film oxide superconductor NMR probe coil resistant to frequency shifts due to conductor burn out at operating currents.

38. 发明专利

FR2837236A1 Nuclear magnetic resonance tool, for determining parameter of interest for formation surrounding borehole, comprises loop gap resonator associated with nuclear magnetic resonance tool 未知
公开(公告)号：FR2837236A1
公开(公告)日：2003-09-19
申请号：FR0301743
申请日：2003-02-13
申请人： BAKER HUGHES INC
发明人： KRUSPE THOMAS , BLANZ MARTIN , ROTTENGATTER PETER
IPC分类号： G01R33/343 , G01R33/44 , G01V3/32 , E21B47/00
摘要： A nuclear magnetic resonance (NMR) tool (79) comprises loop gap resonator (200) associated with NMR tool for transmitting radio frequency (RF) magnetic field into region of interest in the formation or receiving NMR signal from the formation. An Independent claim is also included for a method of determining a parameter of interest for a formation surrounding borehole (26) by traversing borehole formed in the formation with NMR tool.

39. 发明专利

GB2338788B Slotted rf shields for nuclear magnetic resonance probes 未知
公开(公告)号：GB2338788B
公开(公告)日：2003-02-19
申请号：GB9911203
申请日：1999-05-13
申请人： VARIAN INC
发明人： BEHBIN ALI
IPC分类号： G01R33/34 , G01R33/343 , G01R33/422

40. 发明专利

DE69615180D1 未知
公开(公告)号：DE69615180D1
公开(公告)日：2001-10-18
申请号：DE69615180
申请日：1996-06-03
申请人： BRUKER AG FAELLANDEN
发明人： BREY W , ANDERSON A , WONG HA , FUKS FELIPE , KOTSUBO Y , WITHERS S
IPC分类号： G01R33/343 , G01R33/34 , G01R33/36 , G01R33/56 , H01G4/40 , H01G4/012
摘要： A method for making an NMR probe coil (90) comprises:(a) depositing a conductive film on a substrate;(b) patterning the film to form a coil having an inductive element and a capacitive element wherein the coil has an expected resonant frequency less than a desired resonant frequency of the coil;(c) coupling RF power to the coil at or near the expected resonant frequency;(d) measuring a first observed resonant frequency of the coil;(e) increasing the RF power to the coil at or near its observed resonant frequency;(f) observing the coil for a change in the resonant frequency to a new observed resonant frequency;(g) repeating the increasing the RF power to the coil at or near the observed resonant frequency until a desired power to the coil is reached; and(h) tuning the coil by removing a portion of the capacitive element.This provides a method for making a thin-film oxide superconductor NMR probe coil resistant to frequency shifts due to conductor burn out at operating currents.

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