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Title:
MR IMAGING USING MULTI-CHANNEL RF EXCITATION
Document Type and Number:
WIPO Patent Application WO/2011/039692
Kind Code:
A3
Abstract:
The invention relates to a magnetic resonance imaging apparatus comprising an array of two or more RF antennas(9) for transmitting RF pulses to and receiving MR signals from a body(7) of a patient positioned in an examination volume (2), the RF antennas (9) having spatial transmit and receive sensitivity profiles. The apparatus is arranged to: -control the temporal succession, the phase, and the amplitude of the RF feeding of each individual RF antenna (9), the phases and amplitudes being determined from the spatial transmit sensitivity profiles of the RF antennas(9), and -reconstruct a MR image from a combination of the received MR signals received via the individual RF antennas(9) and from the spatial receive sensitivity profiles of the RF antennas(9). The invention proposes that the apparatus is further arranged to: -determine the spatial transmit sensitivity profiles of the RF antennas (9) from the spatial receive sensitivity profiles of the RF antennas (9), or -determine the spatial receive sensitivity profiles of the RF antennas (9) from the spatial transmit sensitivity profiles of the RF antennas (9).

Inventors:
FUDERER MIHA (NL)
ROZIJN THOMAS HENDRIK (NL)
KATSCHER ULRICH (DE)
NEHRKE KAY (DE)
HARVEY PAUL ROYSTON (NL)
Application Number:
IB2010/054339
Publication Date:
November 10, 2011
Filing Date:
September 27, 2010
Export Citation:
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Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
PHILIPS INTELLECTUAL PROPERTY (DE)
FUDERER MIHA (NL)
ROZIJN THOMAS HENDRIK (NL)
KATSCHER ULRICH (DE)
NEHRKE KAY (DE)
HARVEY PAUL ROYSTON (NL)
International Classes:
G01R33/561
Domestic Patent References:
WO2005022184A12005-03-10
Foreign References:
US20080100292A12008-05-01
US20050110487A12005-05-26
Other References:
SETSOMPOP K ET AL: "Slice-selective RF pulses for in vivo B1<+> inhomogeneity mitigation at 7 Tesla using parallel RF excitation with a 16-element coil", MAGNETIC RESONANCE IN MEDICINE, ACADEMIC PRESS, DULUTH, MN, US, vol. 60, no. 6, 1 December 2008 (2008-12-01), pages 1422 - 1432, XP007915199, ISSN: 0740-3194, [retrieved on 20081124], DOI: DOI:10.1002/MRM.21739
LI B K ET AL: "Transmitting focused B1 field and SENSE reconstruction using an 8-element transceive torso phased array coil", ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY - PROCEEDINGS - CONFERENCE PROCEEDINGS - 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, EMBC 2004 2004 INSTITUTE OF ELECTRI, vol. 3, 1 September 2004 (2004-09-01), pages 1068 - 1071VOL.2, XP010774959, ISBN: 978-0-7803-8439-2, DOI: DOI:10.1109/IEMBS.2004.1403348
P.R.HARVEY ET AL.: "MultiTransmit parallel RF transmission technology", August 2009 (2009-08-01), pages 1 - 16, XP002635564, Retrieved from the Internet [retrieved on 20110506]
ADRIANY GREGOR ET AL: "Transmit and receive transmission line arrays for 7 Tesla parallel imaging", MAGNETIC RESONANCE IN MEDICINE, ACADEMIC PRESS, DULUTH, MN, US, vol. 53, no. 2, 1 February 2005 (2005-02-01), pages 434 - 445, XP002495549, ISSN: 0740-3194, DOI: DOI:10.1002/MRM.20321
C.VON MORZE ET AL.: "Exchange of surface coil antenna patterns due to gyrotropism", PROC.INTL.SOC.MAG.RESON.MED. 16, 2008, pages 1187, XP002635565
R.STOLLBERGER ET AL.: "Determination of the spin density using measured B1 fields", BOOK OF ABSTRACTS, VOLUME 1, SOCIETY OF MAGNETIC RESONANCE IN MEDICINE, ELEVENTH ANNUAL SCIENTIFIC MEETING, AUGUST 8-14, 1992, 1992, pages 1315, XP002635566
WANG J ET AL: "Polarization of the RF Field in a Human Head at High Field: A Study With a Quadrature Surface Coil at 7.0 T", MAGNETIC RESONANCE IN MEDICINE, ACADEMIC PRESS, DULUTH, MN, US, vol. 48, 1 January 2002 (2002-01-01), pages 362 - 369, XP002527082, ISSN: 0740-3194, DOI: DOI:10.1002/MRM.10197
COLLINS C M ET AL: "Different excitation and reception distributions with a single-loop transmit-receive surface coil near a head-sized spherical phantom at 300 MHz", MAGNETIC RESONANCE IN MEDICINE, ACADEMIC PRESS, DULUTH, MN, US, vol. 47, 1 January 2002 (2002-01-01), pages 1026 - 1028, XP002446483, ISSN: 0740-3194, DOI: DOI:10.1002/MRM.10153
Attorney, Agent or Firm:
VAN VELZEN, Maaike, M. et al. (High Tech Campus 44, AE Eindhoven, NL-5600, NL)
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