Tier-based formalism for safety assessment of custom-built RF transmit coils

Autor: B R, Steensma, A, Sadeghi-Tarakameh, E F, Meliado, C A T, van den Berg, D W J, Klomp, P R, Luijten, G J, Metzger, Y, Eryaman, A J E, Raaijmakers

Publikováno v: NMR in biomedicine.

The purpose of this work is to propose a tier-based formalism for safety assessment of custom-built RF coils that balances validation effort with the determination of more or less conservative safety factors. The formalism has 3 tier levels. Higher t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::168748426ff19bceb01088d5789e8bf2
https://pubmed.ncbi.nlm.nih.gov/36368912

Acute stress effects on GABA and glutamate levels in the prefrontal cortex: A 7T 1H magnetic resonance spectroscopy study

Autor: D. W. J. Klomp, René S. Kahn, Vincent O. Boer, Remmelt R. Schür, Christiaan H. Vinkers, Marian Joëls, Marco P. Boks, Jannie P. Wijnen, Lotte C Houtepen

Publikováno v: Neuroimage: Clinical [E], 14, 195. Elsevier BV
NeuroImage: Clinical, Vol 14, Iss C, Pp 195-200 (2017)

There is ample evidence that the inhibitory GABA and the excitatory glutamate system are essential for an adequate response to stress. Both GABAergic and glutamatergic brain circuits modulate hypothalamus-pituitary-adrenal (HPA)-axis activity, and st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1315a2e2a5e1347d11cd01fbf1d74324
https://doi.org/10.1016/j.nicl.2017.01.001

Introduction of Ultra-High-Field MR Imaging in Infants : Preparations and Feasibility

Autor: Evita C Wiegers, Kim V. Annink, Hans Hoogduin, Jeroen Dudink, Jannie P. Wijnen, Erik R. Huijing, Jeroen Hendrikse, Floris Groenendaal, Mjnl Benders, Tanja Alderliesten, Maarten H. Lequin, K.S. Rhebergen, Edwin Versteeg, Alexander J.E. Raaijmakers, F. Visser, Peter R. Luijten, Floor E. Jansen, N.E. van der Aa, D. W. J. Klomp

Publikováno v: AJNR Am J Neuroradiol
American Journal of Neuroradiology, 41(8), 1532. American Society of Neuroradiology
American Journal of Neuroradiology

BACKGROUND AND PURPOSE: Cerebral MR imaging in infants is usually performed with a field strength of up to 3T. In adults, a growing number of studies have shown added diagnostic value of 7T MR imaging. 7T MR imaging might be of additional value in in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c8708bb5483d75d28d73df26650ee70
https://hdl.handle.net/1874/401346

Increased sensitivity of 31 P MRSI using direct detection integrated with multi-echo polarization transfer (DIMEPT)

Autor: W.J.M. van der Kemp, D. W. J. Klomp, Peter R. Luijten, Vincent O. Boer

Publikováno v: NMR in Biomedicine. 27:1248-1255

Here, we show that the sensitivity of 31P MRSI of 31P spins J-coupled to protons can be increased by almost a factor of three when compared with an optimal direct detection free induction decay. By direct detection integrated with multi-echo polariza

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b110b13ce8747e4cbc1421119b7f94f0
https://doi.org/10.1002/nbm.3183

In vivo GABA T 2 determination with J -refocused echo time extension at 7 T

Autor: R.A. de Graaf, Peter R. Luijten, Anna Andreychenko, D. W. J. Klomp, Vincent O. Boer

Publikováno v: NMR in Biomedicine. 26:1596-1601

A method to measure the T2 relaxation time of GABA with spectral editing techniques is proposed. Spectral editing techniques can be used to unambiguously extract signals of low concentration J-coupled spins such as γ-aminobutyric acid (GABA) from ov

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6bb70b3ef05860ee026b3f2dfb1e016e
https://doi.org/10.1002/nbm.2997