A high‐performance gradient insert for rapid and short‐T2 imaging at full duty cycle

The goal of this study was to devise a gradient system for MRI in humans that reconciles cutting‐edge gradient strength with rapid switching and brings up the duty cycle to 100% at full continuous amplitude. Aiming to advance neuroimaging and short‐T2 techniques, the hardware design focused on the head and the extremities as target anatomies.

[1]  Julien Cohen-Adad,et al.  Pushing the limits of in vivo diffusion MRI for the Human Connectome Project , 2013, NeuroImage.

[2]  P. Callaghan,et al.  Sensitivity and resolution in NMR imaging , 1987 .

[3]  R. Turner,et al.  Gradient coil design: a review of methods. , 1993, Magnetic resonance imaging.

[4]  Richard Bowtell,et al.  Novel gradient coils designed using a boundary element method , 2007 .

[5]  G H Glover,et al.  Simple analytic spiral K‐space algorithm , 1999, Magnetic resonance in medicine.

[6]  Sharon M Abel,et al.  Sound attenuation from earmuffs and earplugs in combination: maximum benefits vs. missed information. , 2006, Aviation, space, and environmental medicine.

[7]  S. Hidalgo-Tobón,et al.  Theory of gradient coil design methods for magnetic resonance imaging , 2010 .

[8]  N J Pelc,et al.  Concomitant gradient terms in phase contrast MR: Analysis and correction , 1998, Magnetic resonance in medicine.

[9]  E R McVeigh,et al.  The effect of high performance gradients on fast gradient echo imaging , 1994, Magnetic resonance in medicine.

[10]  Lars Kasper,et al.  A field camera for MR sequence monitoring and system analysis , 2016, Magnetic resonance in medicine.

[11]  Steen Moeller,et al.  Concept and realization of high strength gradients for the Human Connectome Project , 2011 .

[12]  Michael Garwood,et al.  Fast and quiet MRI using a swept radiofrequency. , 2006, Journal of magnetic resonance.

[13]  Brian K. Rutt,et al.  Gradient and shim technologies for ultra high field MRI , 2016, NeuroImage.

[14]  Yunhong Shu,et al.  B0 concomitant field compensation for MRI systems employing asymmetric transverse gradient coils , 2018, Magnetic resonance in medicine.

[15]  R. Kimmlingen CHAPTER 5:Magnetic Field Gradients , 2016 .

[16]  Experimental determination of human peripheral nerve stimulation thresholds in a 3‐axis planar gradient system , 2009, Magnetic resonance in medicine.

[17]  Nikolaus M. Szeverenyi,et al.  Ultrashort echo time (UTE) magnetic resonance imaging of the short T2 components in white matter of the brain using a clinical 3T scanner , 2014, NeuroImage.

[18]  A. Manduca,et al.  Magnetic resonance elastography by direct visualization of propagating acoustic strain waves. , 1995, Science.

[19]  D. Porter,et al.  Concomitant field terms for asymmetric gradient coils: Consequences for diffusion, flow, and echo‐planar imaging , 2008, Magnetic resonance in medicine.

[20]  P R Harvey,et al.  Modular gradient coil: A new concept in high‐performance whole‐body gradient coil design , 1999, Magnetic resonance in medicine.

[21]  G M Bydder,et al.  Magnetic resonance imaging of short T2 components in tissue. , 2003, Clinical radiology.

[22]  Martin O Leach,et al.  A complete distortion correction for MR images: I. Gradient warp correction , 2005, Physics in medicine and biology.

[23]  J. E. Tanner,et al.  Spin diffusion measurements : spin echoes in the presence of a time-dependent field gradient , 1965 .

[24]  Nicholas R Zwart,et al.  Spiral trajectory design: A flexible numerical algorithm and base analytical equations , 2014, Magnetic resonance in medicine.

[25]  Arvind Caprihan,et al.  Imaging lungs using inert fluorinated gases , 1998, Magnetic resonance in medicine.

[26]  Peter M Jakob,et al.  Ultrashort echo time imaging using pointwise encoding time reduction with radial acquisition (PETRA) , 2012, Magnetic resonance in medicine.

[27]  Ara Nazarian,et al.  Water‐ and fat‐suppressed proton projection MRI (WASPI) of rat femur bone , 2007, Magnetic resonance in medicine.

[28]  Matt A. Bernstein,et al.  Peripheral nerve stimulation characteristics of an asymmetric head‐only gradient coil compatible with a high‐channel‐count receiver array , 2016, Magnetic resonance in medicine.

[29]  Brian K Rutt,et al.  On the accurate analysis of vibroacoustics in head insert gradient coils , 2017, Magnetic resonance in medicine.

[30]  S Hafner,et al.  Fast imaging in liquids and solids with the Back-projection Low Angle ShoT (BLAST) technique. , 1994, Magnetic resonance imaging.

[31]  Robert Turner,et al.  Echo‐planar imaging with asymmetric gradient modulation and inner‐volume excitation , 1990, Magnetic resonance in medicine.

[32]  Yunhong Shu,et al.  Gradient pre‐emphasis to counteract first‐order concomitant fields on asymmetric MRI gradient systems , 2017, Magnetic resonance in medicine.

[33]  Sam T. S. Wong,et al.  A strategy for sampling on a sphere applied to 3D selective RF pulse design , 1994, Magnetic resonance in medicine.

[34]  D. Madio,et al.  Ultra‐fast imaging using low flip angles and fids , 1995, Magnetic resonance in medicine.

[35]  Hyungseok Jang,et al.  Ramped hybrid encoding for improved ultrashort echo time imaging , 2016, Magnetic resonance in medicine.

[36]  Andrew G Webb,et al.  Magnetic Resonance Technology: Hardware and System Component Design , 2016 .

[37]  이수정 해외산업간호정보 - 미국 산업안전보건연구원(National Institute for Occupational Safety and Health) 소개 , 2009 .

[38]  D. Alsop,et al.  Optimization of torque‐balanced asymmetric head gradient coils , 1996, Magnetic resonance in medicine.

[39]  J. Sabate,et al.  High-power high-fidelity switching amplifier driving gradient coils for MRI systems , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[40]  J M Pauly,et al.  Lung parenchyma: projection reconstruction MR imaging. , 1991, Radiology.

[41]  G. Peeren Stream function approach for determining optimal surface currents , 2003 .

[42]  Feng Jia,et al.  Development and implementation of an 84‐channel matrix gradient coil , 2018, Magnetic resonance in medicine.

[43]  Eric C. Wong Local head gradient coils: Window(s) of opportunity , 2012, NeuroImage.

[44]  B. Rutt,et al.  Design and fabrication of a three‐axis edge ROU head and neck gradient coil , 2000, Magnetic resonance in medicine.