title: 16-channel bow tie antenna transceiver array for cardiac MR at 7.0 tesla.
abstract: To design, evaluate, and apply a bow tie antenna transceiver radiofrequency (RF) coil array tailored for cardiac MRI at 7.0 Tesla (T).
  
  
  
  The radiofrequency (RF) coil array comprises 16 building blocks each containing a bow tie shaped λ/2-dipole antenna. Numerical simulations were used for transmission field homogenization and RF safety validation. RF characteristics were examined in a phantom study. The array's suitability for high spatial resolution two-dimensional (2D) CINE imaging and for real time imaging of the heart was examined in a volunteer study.
  
  
  
  The arrays transmission fields and RF characteristics are suitable for cardiac MRI at 7.0T. The coil performance afforded a spatial resolution as good as (0.8 × 0.8 × 2.5) mm(3) for segmented 2D CINE MRI at 7.0T which is by a factor of 12 superior versus standardized protocols used in clinical practice at 1.5T. The proposed transceiver array supports 1D acceleration factors of up to R = 6 without impairing image quality significantly.
  
  
  
  The 16-channel bow tie antenna transceiver array supports accelerated and high spatial resolution cardiac MRI. The array is compatible with multichannel transmission and provides a technological basis for future clinical assessment of parallel transmission techniques at 7.0 Tesla. Magn Reson Med 75:2553-2565, 2016. © 2015 Wiley Periodicals, Inc.
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Celal
authors.initials: C
authors.lastname: Oezerdem
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Lukas
authors.initials: L
authors.lastname: Winter
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Graessl
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Katharina
authors.initials: K
authors.lastname: Paul
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Els
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Oliver
authors.initials: O
authors.lastname: Weinberger
authors.affiliation: MRI.TOOLS GmbH, Berlin, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Rieger
authors.affiliation: MRI.TOOLS GmbH, Berlin, Germany.
authors.forename: Andre
authors.initials: A
authors.lastname: Kuehne
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.|DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Dieringer
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Hezel
authors.affiliation: Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Voit
authors.affiliation: Biomedizinische NMR Forschungs GmbH am Max-Planck-Institut für biophysikalische Chemie, Göttingen, Germany.|DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Frahm
authors.affiliation: Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany.|DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany.
authors.forename: Thoralf
authors.initials: T
authors.lastname: Niendorf
mesh_terms: D000328:Adult; D004867:Equipment Design; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000295:instrumentation* / Q000379:methods*; D008297:Male; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D059629:Signal-To-Noise Ratio; D014159:Transducers; D055815:Young Adult
keywords: RF coil; cardiovascular MRI; electrical dipole; parallel imaging; transceiver array; ultrahigh field MRI