scholarly journals Resonant Mode Reduction in Radiofrequency Volume Coils for Ultrahigh Field Magnetic Resonance Imaging

Materials ◽  
2011 ◽  
Vol 4 (8) ◽  
pp. 1333-1344 ◽  
Author(s):  
Yong Pang ◽  
Zhentian Xie ◽  
Ye Li ◽  
Duan Xu ◽  
Daniel Vigneron ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonant Mode ◽  
Resonance Imaging ◽  
Ultrahigh Field

scholarly journals Tilted Microstrip Phased Arrays With Improved Electromagnetic Decoupling for Ultrahigh-Field Magnetic Resonance Imaging

Medicine ◽  
2014 ◽  
Vol 93 (28) ◽  
pp. e311 ◽  
Author(s):  
Yong Pang ◽  
Bing Wu ◽  
Xiaohua Jiang ◽  
Daniel B. Vigneron ◽  
Xiaoliang Zhang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Phased Arrays ◽  
Resonance Imaging ◽  
Ultrahigh Field

NaDyF4 Nanoparticles as T2 Contrast Agents for Ultrahigh Field Magnetic Resonance Imaging

2012 ◽  
Vol 3 (4) ◽  
pp. 524-529 ◽  
Author(s):  
Gautom Kumar Das ◽  
Noah J. J. Johnson ◽  
Jordan Cramen ◽  
Barbara Blasiak ◽  
Peter Latta ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Resonance Imaging ◽  
Ultrahigh Field ◽  
T2 Contrast Agents

scholarly journals Kerker Effect in Ultrahigh-Field Magnetic Resonance Imaging

2018 ◽  
Vol 8 (3) ◽  
Author(s):  
Marc Dubois ◽  
Lisa Leroi ◽  
Zo Raolison ◽  
Redha Abdeddaim ◽  
Tryfon Antonakakis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Ultrahigh Field

scholarly journals Neuroimaging brainstem circuitry supporting cardiovagal response to pain: a combined heart rate variability/ultrahigh-field (7 T) functional magnetic resonance imaging study

2016 ◽  
Vol 374 (2067) ◽  
pp. 20150189 ◽  
Author(s):  
Roberta Sclocco ◽  
Florian Beissner ◽  
Gaelle Desbordes ◽  
Jonathan R. Polimeni ◽  
Lawrence L. Wald ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Magnetic Resonance ◽  
Spatial Resolution ◽  
Pain Processing ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Ultrahigh Field ◽  
Brainstem Nuclei

Central autonomic control nuclei in the brainstem have been difficult to evaluate non-invasively in humans. We applied ultrahigh-field (7 T) functional magnetic resonance imaging (fMRI), and the improved spatial resolution it affords (1.2 mm isotropic), to evaluate putative brainstem nuclei that control and/or sense pain-evoked cardiovagal modulation (high-frequency heart rate variability (HF-HRV) instantaneously estimated through a point-process approach). The time-variant HF-HRV signal was used to guide the general linear model analysis of neuroimaging data. Sustained (6 min) pain stimulation reduced cardiovagal modulation, with the most prominent reduction evident in the first 2 min. Brainstem nuclei associated with pain-evoked HF-HRV reduction were previously implicated in both autonomic regulation and pain processing. Specifically, clusters consistent with the rostral ventromedial medulla, ventral nucleus reticularis (Rt)/nucleus ambiguus (NAmb) and pontine nuclei (Pn) were found when contrasting sustained pain versus rest. Analysis of the initial 2-min period identified Rt/NAmb and Pn, in addition to clusters consistent with the dorsal motor nucleus of the vagus/nucleus of the solitary tract and locus coeruleus. Combining high spatial resolution fMRI and high temporal resolution HF-HRV allowed for a non-invasive characterization of brainstem nuclei, suggesting that nociceptive afference induces pain-processing brainstem nuclei to function in concert with known premotor autonomic nuclei in order to affect the cardiovagal response to pain.

scholarly journals Fast Diffusion Tensor Magnetic Resonance Imaging of the Mouse Brain at Ultrahigh-Field: Aiming at Cohort Studies

PLoS ONE ◽  
2012 ◽  
Vol 7 (12) ◽  
pp. e53389 ◽  
Author(s):  
Hans-Peter Müller ◽  
Ina Vernikouskaya ◽  
Albert C. Ludolph ◽  
Jan Kassubek ◽  
Volker Rasche
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cohort Studies ◽  
Mouse Brain ◽  
Diffusion Tensor ◽  
Fast Diffusion ◽  
Resonance Imaging ◽  
Ultrahigh Field
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