In vivo human head MRI at 10.5T: A radiofrequency safety study and preliminary imaging results

The purpose of this study is to safely acquire the first human head images at 10.5T.

[1]  W. Edelstein,et al.  The intrinsic signal‐to‐noise ratio in NMR imaging , 1986, Magnetic resonance in medicine.

[2]  K. Uğurbil,et al.  Transmit and receive transmission line arrays for 7 Tesla parallel imaging , 2005, Magnetic resonance in medicine.

[3]  O. Doessel,et al.  Patient‐individual local SAR determination: In vivo measurements and numerical validation , 2012, Magnetic resonance in medicine.

[4]  Niels Kuster,et al.  The Virtual Family—development of surface-based anatomical models of two adults and two children for dosimetric simulations , 2010, Physics in medicine and biology.

[5]  F. Clarke.  Optimization And Nonsmooth Analysis , 1983 .

[6]  Peter R Luijten,et al.  The fractionated dipole antenna: A new antenna for body imaging at 7 Tesla , 2016, Magnetic resonance in medicine.

[7]  Zang-HeeCho,et al.  Observation of the Lenticulostriate Arteries in the Human Brain In Vivo Using 7.0T MR Angiography , 2008 .

[8]  Cornelis A T van den Berg,et al.  Specific absorption rate intersubject variability in 7T parallel transmit MRI of the head , 2013, Magnetic resonance in medicine.

[9]  Jeff H. Duyn,et al.  High-field MRI of brain cortical substructure based on signal phase , 2007, Proceedings of the National Academy of Sciences.

[10]  Thoralf Niendorf,et al.  Two‐Dimensional sixteen channel transmit/receive coil array for cardiac MRI at 7.0 T: Design, evaluation, and application , 2012, Journal of magnetic resonance imaging : JMRI.

[11]  Robert Turner,et al.  Recent applications of UHF‐MRI in the study of human brain function and structure: a review , 2016, NMR in biomedicine.

[12]  P. Börnert,et al.  Transmit SENSE , 2003, Magnetic resonance in medicine.

[13]  Robert Turner,et al.  Fast MRI coil analysis based on 3-D electromagnetic and RF circuit co-simulation. , 2009, Journal of magnetic resonance.

[14]  P. Dimbylow,et al.  Fine resolution calculations of SAR in the human body for frequencies up to 3 GHz. , 2002, Physics in medicine and biology.

[15]  G. Metzger,et al.  Local B1+ shimming for prostate imaging with transceiver arrays at 7T based on subject‐dependent transmit phase measurements , 2008, Magnetic resonance in medicine.

[16]  Kâmil Uğurbil,et al.  Mitigating transmit B 1 inhomogeneity in the liver at 7T using multi-spoke parallel transmit RF pulse design. , 2014, Quantitative imaging in medicine and surgery.

[17]  Vasily L Yarnykh,et al.  Actual flip‐angle imaging in the pulsed steady state: A method for rapid three‐dimensional mapping of the transmitted radiofrequency field , 2007, Magnetic resonance in medicine.

[18]  Stuart Crozier,et al.  Improving SAR estimations in MRI using subject-specific models , 2012, Physics in medicine and biology.

[19]  Kivanc Kose,et al.  Investigating the physiological effects of 10.5 Tesla static field exposure on anesthetized swine , 2018, Magnetic resonance in medicine.

[20]  O. Dössel,et al.  Toward individualized SAR models and in vivo validation , 2011, Magnetic resonance in medicine.

[21]  Zang-Hee Cho,et al.  Observation of the Lenticulostriate Arteries in the Human Brain In Vivo Using 7.0T MR Angiography , 2008, Stroke.

[22]  P. Luijten,et al.  Improving peak local SAR prediction in parallel transmit using in situ S‐matrix measurements , 2017, Magnetic resonance in medicine.

[23]  C A T van den Berg,et al.  Design of a radiative surface coil array element at 7 T: The single‐side adapted dipole antenna , 2011, Magnetic resonance in medicine.

[24]  E. Atalar,et al.  Ultimate intrinsic signal‐to‐noise ratio in MRI , 1998, Magnetic resonance in medicine.

[25]  Klaus Scheffler,et al.  Safety testing and operational procedures for self‐developed radiofrequency coils , 2016, NMR in biomedicine.

[26]  Yudong Zhu,et al.  Parallel excitation with an array of transmit coils , 2004, Magnetic resonance in medicine.

[27]  Peter Andersen,et al.  9.4T human MRI: Preliminary results , 2006, Magnetic resonance in medicine.

[28]  Dirk Voit,et al.  16‐channel bow tie antenna transceiver array for cardiac MR at 7.0 tesla , 2016, Magnetic resonance in medicine.

[29]  Jullie W Pan,et al.  High frequency volume coils for clinical NMR imaging and spectroscopy , 1994, Magnetic resonance in medicine.

[30]  Thoralf Niendorf,et al.  Electrodynamics and radiofrequency antenna concepts for human magnetic resonance at 23.5 T (1 GHz) and beyond , 2016, Magnetic Resonance Materials in Physics, Biology and Medicine.

[31]  Michel Luong,et al.  Probabilistic analysis of the specific absorption rate intersubject variability safety factor in parallel transmission MRI , 2017, Magnetic resonance in medicine.

[32]  M. E. Ladd,et al.  Assessment of RF Safety of Transmit Coils at 7 Tesla by Experimental and Numerical Procedures , 2010 .

[33]  Daniel K Sodickson,et al.  Method for in situ characterization of radiofrequency heating in parallel transmit MRI , 2013, Magnetic resonance in medicine.

[34]  Gregory J. Metzger,et al.  Radiofrequency heating studies on anesthetized swine using fractionated dipole antennas at 10.5 T , 2018, Magnetic resonance in medicine.

[35]  Petra Schmalbrock,et al.  Enhanced gray and white matter contrast of phase susceptibility‐weighted images in ultra‐high‐field magnetic resonance imaging , 2003, Journal of magnetic resonance imaging : JMRI.

[36]  James C. Lin,et al.  SAR and temperature: Simulations and comparison to regulatory limits for MRI , 2007, Journal of magnetic resonance imaging : JMRI.

[37]  Yukihiko Fujii,et al.  In Vivo Visualization of Senile‐Plaque‐Like Pathology in Alzheimer's Disease Patients by MR Microscopy on a 7T System , 2008, Journal of neuroimaging : official journal of the American Society of Neuroimaging.

[38]  Peng Zeng,et al.  Statistical simulation of SAR variability with geometric and tissue property changes by using the unscented transform , 2015, Magnetic resonance in medicine.

[39]  J. Hennig.  Multiecho imaging sequences with low refocusing flip angles , 1988 .

[40]  K. Uğurbil,et al.  Temperature and SAR calculations for a human head within volume and surface coils at 64 and 300 MHz , 2004, Journal of magnetic resonance imaging : JMRI.

[41]  Shaihan J. Malik,et al.  Comparison between simulated decoupling regimes for specific absorption rate prediction in parallel transmit MRI , 2015, Magnetic resonance in medicine.