作者
Steve CN Hui, Mark Mikkelsen, Helge J Zöllner, Vishwadeep Ahluwalia, Sarael Alcauter, Laima Baltusis, Deborah A Barany, Laura R Barlow, Robert Becker, Jeffrey I Berman, Adam Berrington, Pallab K Bhattacharyya, Jakob Udby Blicher, Wolfgang Bogner, Mark S Brown, Vince D Calhoun, Ryan Castillo, Kim M Cecil, Yeo Bi Choi, Winnie CW Chu, William T Clarke, Alexander R Craven, Koen Cuypers, Michael Dacko, Camilo de la Fuente-Sandoval, Patricia Desmond, Aleksandra Domagalik, Julien Dumont, Niall W Duncan, Ulrike Dydak, Katherine Dyke, David A Edmondson, Gabriele Ende, Lars Ersland, C John Evans, Alan SR Fermin, Antonio Ferretti, Ariane Fillmer, Tao Gong, Ian Greenhouse, James T Grist, Meng Gu, Ashley D Harris, Katarzyna Hat, Stefanie Heba, Eva Heckova, John P Hegarty II, Kirstin-Friederike Heise, Shiori Honda, Aaron Jacobson, Jacobus FA Jansen, Christopher W Jenkins, Stephen J Johnston, Christoph Juchem, Alayar Kangarlu, Adam B Kerr, Karl Landheer, Thomas Lange, Phil Lee, Swati Rane Levendovszky, Catherine Limperopoulos, Feng Liu, William Lloyd, David J Lythgoe, Maro G Machizawa, Erin L MacMillan, Richard J Maddock, Andrei V Manzhurtsev, María L Martinez-Gudino, Jack J Miller, Heline Mirzakhanian, Marta Moreno-Ortega, Paul G Mullins, Shinichiro Nakajima, Jamie Near, Ralph Noeske, Wibeke Nordhøy, Georg Oeltzschner, Raul Osorio-Duran, Maria CG Otaduy, Erick H Pasaye, Ronald Peeters, Scott J Peltier, Ulrich Pilatus, Nenad Polomac, Eric C Porges, Subechhya Pradhan, James Joseph Prisciandaro, Nicolaas A Puts, Caroline D Rae, Francisco Reyes-Madrigal, Timothy PL Roberts, Caroline E Robertson, Jens T Rosenberg, Diana-Georgiana Rotaru, Ruth L O'Gorman Tuura, Muhammad G Saleh, Kristian Sandberg, Ryan Sangill, Keith Schembri, Anouk Schrantee, Natalia A Semenova, Debra Singel, Rouslan Sitnikov, Jolinda Smith, Yulu Song, Craig Stark, Diederick Stoffers, Stephan P Swinnen, Rongwen Tain, Costin Tanase, Sofie Tapper, Martin Tegenthoff, Thomas Thiel, Marc Thioux, Peter Truong, Pim van Dijk, Nolan Vella, Rishma Vidyasagar, Andrej Vovk, Guangbin Wang, Lars T Westlye, Timothy K Wilbur, William R Willoughby, Martin Wilson, Hans-Jörg Wittsack, Adam J Woods, Yen-Chien Wu, Junqian Xu, Maria Yanez Lopez, David KW Yeung, Qun Zhao, Xiaopeng Zhou, Gasper Zupan, Richard AE Edden
发表日期
2021/11/1
期刊
NeuroImage
卷号
241
页码范围
118430
出版商
Academic Press
简介
Purpose
Heating of gradient coils and passive shim components is a common cause of instability in the B0 field, especially when gradient intensive sequences are used. The aim of the study was to set a benchmark for typical drift encountered during MR spectroscopy (MRS) to assess the need for real-time field-frequency locking on MRI scanners by comparing field drift data from a large number of sites.
Method
A standardized protocol was developed for 80 participating sites using 99 3T MR scanners from 3 major vendors. Phantom water signals were acquired before and after an EPI sequence. The protocol consisted of: minimal preparatory imaging; a short pre-fMRI PRESS; a ten-minute fMRI acquisition; and a long post-fMRI PRESS acquisition. Both pre- and post-fMRI PRESS were non-water suppressed. Real-time frequency stabilization/adjustment was switched off when appropriate. Sixty scanners repeated the …
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