DE102006042996A1 - Antenna for magnetic resonance application, has conductor loop oscillating high frequency current in current flow direction during operation of antenna and divided into loop sections in current flow direction - Google Patents
Antenna for magnetic resonance application, has conductor loop oscillating high frequency current in current flow direction during operation of antenna and divided into loop sections in current flow direction Download PDFInfo
- Publication number
- DE102006042996A1 DE102006042996A1 DE200610042996 DE102006042996A DE102006042996A1 DE 102006042996 A1 DE102006042996 A1 DE 102006042996A1 DE 200610042996 DE200610042996 DE 200610042996 DE 102006042996 A DE102006042996 A DE 102006042996A DE 102006042996 A1 DE102006042996 A1 DE 102006042996A1
- Authority
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- Germany
- Prior art keywords
- antenna
- loop
- flow direction
- current flow
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
- G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
- G01R33/3628—Tuning/matching of the transmit/receive coil
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34069—Saddle coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34076—Birdcage coils
Abstract
Description
Die vorliegende Erfindung betrifft eine Antenne für Magnetresonanzanwendungen, wobei die Antenne eine Leiterschleife aufweist, in der im Betrieb der Antenne in einer Stromflussrichtung ein Hochfrequenzstrom oszilliert, wobei die Leiterschleife in der Stromflussrichtung in Schleifenabschnitte aufgeteilt ist, die mittels Kondensatoren kapazitiv miteinander gekoppelt sind. Die Schleifenabschnitte können als Leiterbahnen ausgebildet sein, die auf einer Leiterplatte verlaufen. Die Schleifenabschnitte können dabei alternativ auf derselben Leiterplatte oder auf voneinander verschiedenen Leiterplatten angeordnet sein.The The present invention relates to an antenna for magnetic resonance applications, wherein the antenna has a conductor loop in which the Antenna oscillates in a current flow direction a high-frequency current wherein the conductor loop in the current flow direction in loop sections is divided, which capacitively coupled by means of capacitors are. The loop sections can be designed as tracks, which run on a circuit board. The loop sections can alternatively on the same circuit board or on each other be arranged on different circuit boards.
Die Kondensatoren sind im Stand der Technik als diskrete Bauelemente ausgebildet, die – beispielsweise durch Löten – mit den Schleifenabschnitten verbunden sind. Sie können insbesondere auf so genannten Kondensatorboards (C-Boards) angeordnet sein.The Capacitors are known in the art as discrete components trained, the - for example by soldering - with the Loop sections are connected. You can in particular on so-called Condenser boards (C-boards) can be arranged.
Bei flexiblen Antennen tritt beim Verformen der Antenne (beispielsweise beim Anpassen der jeweiligen Antenne an ein Untersuchungsobjekt) eine Biege- und/oder Scherbeanspruchung auf. Diese Beanspruchungen stellen mechanische Belastungen dar, welche im Dauerbetrieb zu Materialermüdung und Kontaktbrücken führen können.at flexible antennas occurs when deforming the antenna (for example when fitting the respective antenna to an examination object) a bending and / or shear stress on. These stresses represent mechanical loads, which in continuous operation to material fatigue and Contact bridges to lead can.
Ähnliche Probleme stellen sich bei starren Antennen. Dies gilt insbesondere dann, wenn die Antenne in zwei oder mehr voneinander verschiedenen Richtungen gekrümmt ist (so genannte 3D-Anformung). Denn das Anformen erfolgt erst nach dem Löten der Kondensatoren mit den Schleifenabschnitten.Similar Problems arise with rigid antennas. This is especially true then, if the antenna is in two or more different directions bent is (so-called 3D molding). Because the molding takes place only after the soldering the capacitors with the loop sections.
Auch für andere Anwendungen – beispielsweise für eine Kombination einer Antenne für Magnetresonanzanwendungen mit einem PET-Detektor (PET = Positronen-Emissions-Tomographie) oder bei Verwendung supraleitender Antennen – wäre es günstig, wenn auf die Kondensatoren (im Sinne des Vorhandenseins diskreter Bauelemente) verzichtet werden könnte. Denn bei Anwendung von PET sollten in der zu untersuchenden Schicht möglichst keine Materialien vorhanden sein, die Strahlung von 511 keV absorbieren, dämpfen oder ablenken. Bei supraleitenden Spulen ist die Kühlung diskreter Bauelemente schwierig.Also for others Applications - for example for one Combination of an antenna for Magnetic resonance applications with a PET detector (PET = positron emission tomography) or when using superconducting antennas - it would be beneficial if on the capacitors be omitted (in terms of the presence of discrete components) could. Because when using PET should be in the layer to be examined preferably there are no materials that absorb radiation of 511 keV, dampen or distract. For superconducting coils, the cooling is more discrete Components difficult.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine Antenne für Magnetresonanzanwendungen zu schaffen, bei der die Anzahl erforderlicher diskreter Bauelemente reduziert ist, möglichst sogar minimiert ist.The The object of the present invention is an antenna for magnetic resonance applications to create, where the number of required discrete components is reduced, if possible even minimized.
Die Aufgabe wird – ausgehend von einer Antenne der eingangs genannten beschriebenen Art – dadurch gelöst, dass mindestens einer der Kondensatoren durch örtlich voneinander beabstandete Endbereiche von in Stromflussrichtung gesehen aneinander angrenzenden Schleifenabschnitten gebildet ist, die sich in Stromflussrichtung gesehen überlappen.The Task becomes - outgoing of an antenna of the type described above - characterized solved, at least one of the capacitors is spaced by spatially spaced apart ones End regions of each other as seen in the direction of current flow Loop sections is formed, extending in the direction of current flow overlap seen.
Die Leiterplatte weist eine elektrisch isolierende Trägerschicht mit zwei bezüglich der Trägerschicht gegenüber liegenden Grenzflächen auf. Die Leiterbahnen sind auf mindestens einer der Grenzflächen angeordnet. Sie können auch auf beiden Grenzflächen angeordnet sein.The Printed circuit board has an electrically insulating carrier layer with two respects the carrier layer across from lying interfaces on. The conductor tracks are arranged on at least one of the interfaces. You can also on both interfaces be arranged.
In einer möglichen Ausgestaltung der Erfindung sind bezüglich des mindestens einen Kondensators die Endbereiche der Schleifenabschnitte, die den Kondensator bilden, auf derselben Grenzfläche der Trägerschicht angeordnet. Alternativ ist es möglich, dass bezüglich dieses Kondensators die Trägerschicht zwischen den Endbereichen der Schleifenabschnitte, die den Kondensator bilden, angeordnet ist.In a possible Embodiment of the invention are with respect to the at least one Capacitor the end portions of the loop sections that make up the capacitor form on the same interface of the backing arranged. Alternatively it is possible that respect this capacitor, the carrier layer between the end portions of the loop portions that form the capacitor form, is arranged.
Wenn mehr als einer der Kondensatoren durch örtlich voneinander beabstandete Endbereiche von in Stromflussrichtung gesehen aneinander angrenzenden Schleifenabschnitten gebildet ist, können die beiden oben stehend beschriebenen Ausgestal tungen auch kombiniert realisiert sein, d. h. bei einem Teil der Kondensatoren auf die eine Art, bei einem anderen Teil der Kondensatoren auf die andere Art.If more than one of the capacitors by spatially spaced apart End regions of each other as seen in the direction of current flow Loop sections is formed, the two above can described Ausgestal lines also be realized in combination, d. H. in one part of the capacitors in one way, in one other part of the capacitors in the other way.
Die Leiterplatte kann alternativ als flexible oder als starre Leiterplatte ausgebildet sein.The PCB can alternatively be flexible or rigid PCB be educated.
Die Leiterschleife ist in der Regel von einer elektrisch isolierenden Ummantelung umgeben. Die Ummantelung kann alternativ flexibel oder formstabil – insbesondere starr – sein.The Conductor loop is usually of an electrically insulating Surrounded by sheathing. The sheath may alternatively be flexible or dimensionally stable - in particular be rigid.
Die erfindungsgemäß ausgestaltete Antenne ist insbesondere dann nützlich, wenn die Leiterschleife in mindestens zwei voneinander verschiedenen Richtungen gekrümmt ist.The designed according to the invention Antenna is particularly useful if the conductor loop in at least two different from each other Directions curved is.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen in Verbindung mit den Zeichnungen. Es zeigen in Prinzipdarstellung:Further Advantages and details will become apparent from the following description of exemplary embodiments in conjunction with the drawings. In a schematic representation:
Gemäß den
Die
in den
Die
Leiterschleife
In
der Beschaltung
Gemäß den
Die
Ausgestaltung der Kondensatoren
Die
Gemäß den
Auch
bei der Ausgestaltung der
Es
ist möglich,
dass nur ein einziger der Kondensatoren
Wenn
mehr als einer der Kondensatoren
Es
ist möglich,
dass die Leiterplatte
Die
Leiterschleife
Die
erfindungsgemäße Ausgestaltung
ist prinzipiell bei allen Arten von Antennen
Eine
Antenne
Die
erfindungsgemäß ausgestaltete
Antenne
Die obige Beschreibung dient ausschließlich der Erläuterung der vorliegenden Erfindung. Der Schutzumfang der vorliegenden Erfindung soll hingegen ausschließlich durch die beigefügten Ansprüche bestimmt sein.The The above description is for explanation only of the present invention. The scope of the present invention should, however, exclusively through the attached Claims determined be.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610042996 DE102006042996A1 (en) | 2006-09-13 | 2006-09-13 | Antenna for magnetic resonance application, has conductor loop oscillating high frequency current in current flow direction during operation of antenna and divided into loop sections in current flow direction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610042996 DE102006042996A1 (en) | 2006-09-13 | 2006-09-13 | Antenna for magnetic resonance application, has conductor loop oscillating high frequency current in current flow direction during operation of antenna and divided into loop sections in current flow direction |
Publications (1)
Publication Number | Publication Date |
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DE102006042996A1 true DE102006042996A1 (en) | 2007-10-04 |
Family
ID=38460388
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DE200610042996 Ceased DE102006042996A1 (en) | 2006-09-13 | 2006-09-13 | Antenna for magnetic resonance application, has conductor loop oscillating high frequency current in current flow direction during operation of antenna and divided into loop sections in current flow direction |
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DE (1) | DE102006042996A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010018479A1 (en) * | 2008-08-13 | 2010-02-18 | Koninklijke Philips Electronics N.V. | Magnetic resonance rf coil |
JP2014061281A (en) * | 2012-08-29 | 2014-04-10 | Toshiba Corp | High-frequency coil and magnetic resonance imaging device |
WO2018098255A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | Systems for a radio frequency coil for mr imaging |
WO2018098265A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | Systems for a radio frequency coil for mr imaging |
WO2018098355A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | A conforming posterior radio frequency (rf) coil array for a magnetic resonance imaging (mri) system |
CN109814054A (en) * | 2017-11-22 | 2019-05-28 | 通用电气公司 | For intervening the RF coil array with MRI system used in surgical procedure |
CN109963507A (en) * | 2016-11-23 | 2019-07-02 | 通用电气公司 | Front radio frequency (RF) coil array for magnetic resonance imaging (MRI) system |
DE102018201476A1 (en) * | 2018-01-31 | 2019-08-01 | Siemens Healthcare Gmbh | Local coil for magnetic resonance tomograph |
WO2019201938A1 (en) * | 2018-04-20 | 2019-10-24 | Otto-Von-Guericke-Universität Magdeburg | Coil and device for wireless signal transmission, and method for producing such a coil |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151791A (en) * | 1983-12-23 | 1985-07-24 | Gen Electric | RF Field coils for NMR apparatus |
WO1994005022A1 (en) * | 1992-08-25 | 1994-03-03 | Superconductor Technologies, Inc. | Superconducting control elements for rf antennas |
DE4218635C2 (en) * | 1992-06-05 | 1996-05-23 | Siemens Ag | Radio-frequency receiving antenna of a device for magnetic resonance imaging with at least one capacitor |
-
2006
- 2006-09-13 DE DE200610042996 patent/DE102006042996A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151791A (en) * | 1983-12-23 | 1985-07-24 | Gen Electric | RF Field coils for NMR apparatus |
DE4218635C2 (en) * | 1992-06-05 | 1996-05-23 | Siemens Ag | Radio-frequency receiving antenna of a device for magnetic resonance imaging with at least one capacitor |
WO1994005022A1 (en) * | 1992-08-25 | 1994-03-03 | Superconductor Technologies, Inc. | Superconducting control elements for rf antennas |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010018479A1 (en) * | 2008-08-13 | 2010-02-18 | Koninklijke Philips Electronics N.V. | Magnetic resonance rf coil |
JP2014061281A (en) * | 2012-08-29 | 2014-04-10 | Toshiba Corp | High-frequency coil and magnetic resonance imaging device |
CN109937006A (en) * | 2016-11-23 | 2019-06-25 | 通用电气公司 | Conformal rear portion radio frequency (RF) coil array for magnetic resonance imaging (MRI) system |
WO2018098265A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | Systems for a radio frequency coil for mr imaging |
WO2018098355A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | A conforming posterior radio frequency (rf) coil array for a magnetic resonance imaging (mri) system |
WO2018098255A1 (en) | 2016-11-23 | 2018-05-31 | General Electric Company | Systems for a radio frequency coil for mr imaging |
US10921400B2 (en) | 2016-11-23 | 2021-02-16 | GE Precision Healthcare LLC | Conforming posterior radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system |
CN109963507A (en) * | 2016-11-23 | 2019-07-02 | 通用电气公司 | Front radio frequency (RF) coil array for magnetic resonance imaging (MRI) system |
CN109937006B (en) * | 2016-11-23 | 2023-08-11 | 通用电气公司 | Conformal rear Radio Frequency (RF) coil array for Magnetic Resonance Imaging (MRI) systems |
US11402447B2 (en) | 2016-11-23 | 2022-08-02 | GE Precision Healthcare LLC | Conforming posterior radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system |
US10921401B2 (en) | 2016-11-23 | 2021-02-16 | GE Precision Healthcare LLC | Anterior radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system |
EP3544498A4 (en) * | 2016-11-23 | 2020-07-29 | General Electric Company | A conforming posterior radio frequency (rf) coil array for a magnetic resonance imaging (mri) system |
EP3544500A4 (en) * | 2016-11-23 | 2020-08-05 | General Electric Company | An anterior radio frequency (rf) coil array for a magnetic resonance imaging (mri) system |
EP3544499A4 (en) * | 2016-11-23 | 2020-11-25 | General Electric Company | Systems for a radio frequency coil for mr imaging |
EP3545323A4 (en) * | 2016-11-23 | 2020-12-02 | General Electric Company | Systems for a radio frequency coil for mr imaging |
CN109814054A (en) * | 2017-11-22 | 2019-05-28 | 通用电气公司 | For intervening the RF coil array with MRI system used in surgical procedure |
US10921399B2 (en) | 2017-11-22 | 2021-02-16 | GE Precision Healthcare LLC | Radio frequency (RF) coil array for a magnetic resonance imaging (MRI) system for use in interventional and surgical procedures |
US10690736B2 (en) | 2018-01-31 | 2020-06-23 | Siemens Healthcare Gmbh | Local coil for magnetic resonance tomography system |
DE102018201476A1 (en) * | 2018-01-31 | 2019-08-01 | Siemens Healthcare Gmbh | Local coil for magnetic resonance tomograph |
WO2019201938A1 (en) * | 2018-04-20 | 2019-10-24 | Otto-Von-Guericke-Universität Magdeburg | Coil and device for wireless signal transmission, and method for producing such a coil |
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