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1. (WO2015043612) A TRANSMIT/RECEIVE SWITCH, A TRANSMIT COIL ARRAY AND A RECEIVE COIL ARRAY FOR MRI
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2015/043612 International Application No.: PCT/EP2013/002877
Publication Date: 02.04.2015 International Filing Date: 25.09.2013
IPC:
G01R 33/3415 (2006.01) ,G01R 33/36 (2006.01) ,G01R 33/34 (2006.01) ,G01R 33/565 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
28
Details of apparatus provided for in groups G01R33/44-G01R33/6496
32
Excitation or detection systems, e.g. using radiofrequency signals
34
Constructional details, e.g. resonators
341
comprising surface coils
3415
comprising arrays of sub-coils
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
28
Details of apparatus provided for in groups G01R33/44-G01R33/6496
32
Excitation or detection systems, e.g. using radiofrequency signals
36
Electrical details, e.g. matching or coupling of the coil to the receiver
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
28
Details of apparatus provided for in groups G01R33/44-G01R33/6496
32
Excitation or detection systems, e.g. using radiofrequency signals
34
Constructional details, e.g. resonators
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
20
involving magnetic resonance
44
using nuclear magnetic resonance (NMR)
48
NMR imaging systems
54
Signal processing systems, e.g. using pulse sequences
56
Image enhancement or correction, e.g. subtraction or averaging techniques
565
Correction of image distortions, e.g. due to magnetic field inhomogeneities
Applicants:
MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E. V. [DE/DE]; Hofgartenstraβe 8 80539 München, DE
Inventors:
GUNAMONY, Shajan; DE
HOFFMANN, Jens; DE
SCHEFFLER, Klaus; DE
POHMANN, Rolf; DE
Agent:
BEIER, Ralph; V. Bezold & Partner Akademiestraße 7 80799 München, DE
Priority Data:
Title (EN) A TRANSMIT/RECEIVE SWITCH, A TRANSMIT COIL ARRAY AND A RECEIVE COIL ARRAY FOR MRI
(FR) COMMUTATEUR D'ÉMISSION/RÉCEPTION, RÉSEAU DE BOBINES D'ÉMISSION ET RÉSEAU DE BOBINES DE RÉCEPTION POUR IRM
Abstract:
(EN) The invention relates to an MRI apparatus for magnetic resonance imaging of a subject of investigation, comprising: a coil arrangement (1) for transmitting an excitation signal into the subject and for receiving a response signal from the subject; a high-power radio-frequency amplifier (4) for generating the excitation signal; and a low-noise amplifier (LNA) for amplifying the response signal. The invention provides a transmit/receive switch (5) which is alternatively operable in a transmit mode or in a receive mode. In the transmit mode, the transmit/receive switch (5) transmits the excitation signal to the coil arrangement (1) and protects the low-noise amplifier (LNA) from the outgoing excitation signal. In the receive mode, the transmit/receive switch (5) routes the incoming response signal to the low-noise amplifier (LNA).
(FR) L'invention concerne un appareil d'IRM destiné à l'imagerie par résonance magnétique d'un sujet de investigation, comportant: un agencement (1) de bobines servant à émettre un signal d'excitation dans le sujet et à recevoir un signal de réponse provenant du sujet; un amplificateur (4) à radiofréquences de grande puissance servant à générer le signal d'excitation; et un amplificateur à faible bruit (LNA) servant à amplifier le signal de réponse. L'invention concerne un commutateur (5) d'émission/réception susceptible de fonctionner au choix dans un mode d'émission ou dans un mode de réception. Dans le mode d'émission, le commutateur (5) d'émission/réception émet le signal d'excitation vers l'agencement (1) de bobines et protège l'amplificateur à faible bruit (LNA) du signal d'excitation sortant. Dans le mode de réception, le commutateur (5) d'émission/réception achemine le signal de réponse entrant jusqu'à l'amplificateur à faible bruit (LNA).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)