TY  - JOUR
A1  - Kraff, Oliver
A1  - Bitz, Andreas
A1  - Breyer, Tobias
A1  - Kruszona, Stefan
A1  - Maderwald, Stefan
A1  - Brote, Irina
A1  - Gizewski, Elke R.
A1  - Ladd, Mark E.
A1  - Quick, Harald H.
T1  - A transmit/receive radiofrequency array for imaging the carotid arteries at 7 Tesla: coil design and first in vivo results
JF  - Investigative Radiology
N2  - Objective: 
To develop a transmit/receive radiofrequency (RF) array for magnetic resonance imaging (MRI) of the carotid arteries at 7 T. The prototype is characterized in numerical simulations and bench measurements, and the feasibility of plaque imaging at 7 T is demonstrated in first in vivo images.

Materials and Methods: 
The RF phased array coil consists of 8 surface loop coils. To allow imaging of both sides of the neck, the RF array is divided into 2 coil clusters, each with 4 overlapping loop elements. For safety validation, numerical computations of the RF field distribution and the corresponding specific absorption rate were performed on the basis of a heterogeneous human body model. To validate the coil model, maps of the transmit B1+ field were compared between simulation and measurement. In vivo images of a healthy volunteer and a patient (ulcerating plaque and a 50% stenosis of the right internal carotid artery) were acquired using a 3-dimensional FLASH sequence with a high isotropic spatial resolution of 0.54 mm as well as using pulse-triggered proton density (PD)/T2-weighted turbo spin echo sequences.

Results: 
Measurements of the S-parameters yielded a reflection and isolation of the coil elements of better than −18 and −13 dB, respectively. Measurements of the g-factor indicated good image quality for parallel imaging acceleration factors up to 2.4. A similar distribution and a very good match of the absolute values were found between the measured and simulated B1+ transmit RF field for the validation of the coil model. In vivo images revealed good signal excitation of both sides of the neck and a high vessel-to-background image contrast for the noncontrast-enhanced 3-dimensional FLASH sequence. Imaging at 7 T could depict the extent of stenosis, and revealed the disruption and ulcer of the plaque.

Conclusions: 
This study demonstrates that 2 four-channel transmit/receive RF arrays for each side of the neck is a suitable concept for in vivo MRI of the carotid arteries at 7 Tesla. Further studies are needed to explore and exploit the full potential of 7 T high-field MRI for carotid atherosclerotic plaque imaging.
Y1  - 2011
U6  - https://doi.org/10.1097/RLI.0b013e318206cee4
SN  - 1536-0210
VL  - 46
IS  - 4
SP  - 246
EP  - 254
PB  - Wolters Kluwer
CY  - Köln
ER  - 
TY  - JOUR
A1  - Selmer, Thorsten
A1  - Thamer, Wiebke
A1  - Cirpus, Irina
A1  - Hans, Marcus
T1  - A two [4Fe-4S]-cluster-containing ferredoxin as an alternative electron donor for 2-hydroxyglutaryl-CoA dehydratase from Acidaminococcus fermentans / Thamer, Wiebke ; Cirpus, Irina ; Hans, Marcus ; Pierik, Antonio, J. ; Selmer, Thorsten ; Bill, Eckhard ;
JF  - Archives of Microbiology. 179 (2003), H. 3
Y1  - 2003
SN  - 1432-072X
SP  - 197
EP  - 204
ER  - 
TY  - JOUR
A1  - Hardt, Arno
A1  - Köhler, M.
A1  - Müller, K. D.
A1  - Stoff, H.
T1  - A two-dimensional position sensitive charged-particle detector for the magnetic spectrograph "BIG KARL" of the Jülich Cyclotron "JULIC". M. Köhler, K. D. Müller, H. Stoff, M. Teske, G. P. A. Berg, A. Hardt, S. Martin, C. Mayer-Böricke ,  J. Meißburger
JF  - Nuclear Instruments and Methods. 75 (1980), H. 2-3
Y1  - 1980
SN  - 0029-554X
SP  - 357
EP  - 362
ER  - 
TY  - JOUR
A1  - Faßbender, Heinz
A1  - Vogler, Heiko
T1  - A universal unification algorithm based on unification-driven leftmost outermost narrowing
JF  - Acta Cybernetica. 11 (1994), H. 3
Y1  - 1994
SN  - 0324-721x
SP  - 139
EP  - 167
ER  - 
TY  - JOUR
A1  - Faßbender, Heinz
T1  - A verified implementation of narrowing
JF  - Programming languages: implementations, logics and programs : proceedings / 7th International Symposium, PLILP '95, Utrecht, The Netherlands, September 20 - 22, 1995. Manuel Hermenegildo ... (ed.)
Y1  - 1995
SN  - 3-540-60359-X
N1  - (Lecture notes in computer science ; 982)
SP  - 63
EP  - 80
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Stock, J.
A1  - Malindretos, J.
A1  - Indlekofer, K.M.
A1  - Pöttgens, Michael
A1  - Förster, Arnold
A1  - Lüth, Hans
T1  - A Vertical Resonant Tunneling Transistor for Application in Digital Logic Circuits
JF  - IEEE Transactions on Electron Devices (T-ED). 48 (2001), H. 6
Y1  - 2001
SN  - 0018-9383
SP  - 1028
EP  - 1032
ER  - 
TY  - JOUR
A1  - Bergmann, Sandra
A1  - Demuth, Bastian
A1  - Sander, Volker
T1  - A Web Framework for Workflow Submission and Monitoring via UNICORE 6 based on Distributable Scientific Workflow Templates
JF  - UNICORE Summit 2011 : proceedings, 7-8 July 2011, Torun, Poland / Mathilde Romberg ... (Eds.)
Y1  - 2011
SN  - 9783893367504
N1  - UNICORE Summit ; (2011 ; 2011.07.07-08 ; Torun) ; Schriften des Forschungszentrums Jülich IAS Series 9
SP  - 45
EP  - 50
PB  - Forschungszentrum Jülich
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Simonis, A.
A1  - Krings, T.
A1  - Lüth, H.
A1  - Wang, J.
A1  - Schöning, Michael Josef
T1  - A „hybrid“ thin-film pH sensor with integrated thick-film reference
JF  - Sensors. 1 (2001), H. 6
Y1  - 2001
SN  - 1424-8220
SP  - 183
EP  - 192
ER  - 
TY  - JOUR
A1  - Golland, Alexander
A1  - Engling, Christoph
T1  - a-i3/BSI Symposium 2014: Sicherheit von Daten und Identitäten angesichts NSA und Big Data
JF  - DSB Datenschutz-Berater
Y1  - 2014
SN  - 0170-7256
VL  - 38
IS  - 7-8
SP  - 165
EP  - 166
PB  - DFV Mediengruppe
CY  - Frankfurt a.M.
ER  - 
TY  - JOUR
A1  - Pawelke, Siegfried
A1  - Schmitt, W.
A1  - Meissen, Th.
T1  - Aachen 3D finger. 3D digitizer for application in dentistry / Schmitt, W. ; Pawelke, S. ; Meissen, Th.
JF  - Biomedizinische Technik. 35 (1990), H. 4
Y1  - 1990
SN  - 0013-5585
SP  - 69
EP  - 71
ER  - 
TY  - JOUR
A1  - Naujokat, Anke
T1  - Aachen: Colourdome
JF  - Bauwelt. 93 (2002), H. 37
Y1  - 2002
SN  - 0931-6590
SP  - 2
ER  - 
TY  - JOUR
A1  - Naujokat, Anke
T1  - Aachen: Deimel und Wittmar : jene zwanziger Jahre
JF  - Bauwelt. 96  (2005), H. 7
Y1  - 2005
SN  - 0931-6590
SP  - 6
EP  - 7
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TY  - JOUR
A1  - Naujokat, Anke
T1  - Aachen: Europäisches Kulturzentrum "Bauhaus Europa"
JF  - Bauwelt. 97  (2006), H. 6
Y1  - 2006
SN  - 0931-6590
SP  - 6
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TY  - JOUR
A1  - Naujokat, Anke
T1  - Aachen: Grau Blau Grün : der Emscher Landschaftspark
JF  - Bauwelt. 96  (2005), H. 29
Y1  - 2005
SN  - 0931-6590
SP  - 3
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A1  - Naujokat, Anke
T1  - Aachen: Symposium - Maulnes und der Manierismus in Frankreich
JF  - Bauwelt. 92 (2001), H. 22
Y1  - 2001
SN  - 0931-6590
SP  - 4
ER  - 
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A1  - Alt, Helmut
T1  - Ab 1975 Uranerz aus Rabbit-Lake
JF  - Energiewirtschaftliche Tagesfragen
Y1  - 1974
SN  - 0720-6240
VL  - 24
IS  - 1/2
SP  - 34
PB  - VDE-Verlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Mang, Thomas
T1  - Abdichtmaterialien gegen drückendes Wasser
JF  - Bauchemie von der Forschung bis zur Praxis : 3. Tagung Bauchemie in Würzburg ; 27./28. September 2001 in Würzburg / GDCh-Fachgruppe Bauchemie ; [Red.: W. Hiller ...]
Y1  - 2002
SN  - 3-936028-04-4
N1  - Tagung Bauchemie <3, 2001, Würzburg> GdCh-Monographie 24 ; Monographie / GDCh, Gesellschaft Deutscher Chemiker ; 24
SP  - 65
PB  - GDCh
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Mang, Thomas
A1  - Haulena, Friedhelm
T1  - Abdichtmaterialien gegen drückendes Wasser und Diesel mit verbesserter Umweltverträglichkeit
JF  - Internationale Zeitschrift für Bauinstandsetzen und Baudenkmalpflege = International journal for restoration of buildings and monuments. 5 (1999), H. 1
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SN  - 0947-4498
SP  - 57
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A1  - Kettern, Jürgen
A1  - Frechen, F. B.
T1  - Abfallentsorgung und Geruchsemissionen. Tl.1. Grundlagen und Problematik / Frechen, F. B.; Kettern, J. T.
JF  - Entsorgungspraxis. 13 (1995), H. 1/2
Y1  - 1995
SN  - 0724-6870
N1  - Fortsetzung in: Entsorgungspraxis 13(1995), Nr. 3
SP  - 58
EP  - 62
ER  - 
TY  - JOUR
A1  - Kettern, Jürgen
A1  - Frechen, F. B.
T1  - Abfallentsorgung und Geruchsemissionen. Tl.2. Minderungsmaßnahmen / Frechen, F. B.; Kettern, J. T.
JF  - Entsorgungspraxis. 13 (1995), H. 1/2
Y1  - 1995
SN  - 0724-6870
N1  - Fortsetzung aus: Entsorgungs-Praxis 13(1995), Nr.1/2.
SP  - 40
EP  - 43
ER  -