TY  - JOUR
A1  - Umutlu, Lale
A1  - Bitz, Andreas
A1  - Maderwald, Stefan
A1  - Orzada, Stephan
A1  - Kinner, Sonja
A1  - Kraff, Oliver
A1  - Brote, Irina
A1  - Ladd, Susanne C.
A1  - Schroeder, Tobias
A1  - Forsting, Michael
T1  - Contrast-enhanced ultra-high-field liver MRI: a feasibility trial
JF  - European Journal of Radiology
Y1  - 2013
U6  - https://doi.org/10.1016/j.ejrad.2011.07.004
SN  - 0720-048X
VL  - 82
IS  - 5
SP  - 760
EP  - 767
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Umutlu, Lale
A1  - Kraff, Oliver
A1  - Fischer, Anja
A1  - Kinner, Sonja
A1  - Maderwald, Stefan
A1  - Nassenstein, Kai
A1  - Nensa, Felix
A1  - Grüneisen, Johannes
A1  - Orzada, Stephan
A1  - Bitz, Andreas
A1  - Forsting, Michael
A1  - Ladd, Mark E.
A1  - Lauenstein, Thomas C.
T1  - Seven-Tesla MRI of the female pelvis
JF  - European Radiology
Y1  - 2013
U6  - https://doi.org/10.1007/s00330-013-2868-0
SN  - 1432-1084
VL  - 23
IS  - 9
SP  - 2364
EP  - 2373
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Bitz, Andreas
A1  - Felder, Jorg
A1  - Wittig, Tilmann
T1  - Designing MRI Coils with Aid of Simulation
JF  - Microwaves & RF
Y1  - 2013
SN  - 0745-2993
VL  - 52
IS  - 7
SP  - 56
PB  - Penton
CY  - Cleveland, Ohio
ER  - 
TY  - JOUR
A1  - Kraff, Oliver
A1  - Wrede, Karsten H.
A1  - Schoemberg, Tobias
A1  - Dammann, Philipp
A1  - Noureddine, Yacine
A1  - Orzada, Stephan
A1  - Ladd, Mark E.
A1  - Bitz, Andreas
T1  - MR safety assessment of potential RF heating from cranial fixation plates at 7 T
JF  - Medical Physics
Y1  - 2013
U6  - https://doi.org/10.1118/1.4795347
SN  - 2473-4209
VL  - 40
IS  - 4
SP  - 042302-1
EP  - 042302-10
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Umutlu, L.
A1  - Maderwald, S.
A1  - Kinner, S.
A1  - Kraff, O.
A1  - Bitz, Andreas
A1  - Orzada, S.
A1  - Johst, S.
A1  - Wrede, K.
A1  - Forsting, M.
A1  - Ladd, M. E.
A1  - Lauenstein, T. C.
A1  - Quick, H. H.
T1  - First-pass contrast-enhanced renal MRA at 7 Tesla: initial results
JF  - European Radiology
Y1  - 2013
U6  - https://doi.org/10.1007/s00330-012-2666-0
SN  - 1432-1084
VL  - 23
IS  - 4
SP  - 1059
EP  - 1066
PB  - Springer
CY  - Berlin
ER  - 
TY  - GEN
A1  - Waiczies, Helmar
A1  - Kühne, André
A1  - Winter, Lukas
A1  - Frauenrath, Tobias
A1  - Hoffmann, Werner
A1  - Ittermann, Bernd
A1  - Waiczies, Sonia
A1  - Niendorf, Thoralf
T1  - Towards theranostics of rheumatoid arthritis: 1H/19F imaging of non-steroidal anti-inflammatory drugs in hand and wrist at 7 Tesla
T2  - 2013 ISMRM Annual Meeting Proceedings
N2  - We have developed a double-tuned ¹H/¹⁹F birdcage resonator dedicated for hand and wrist imaging at 7 T to locally image non-steroidal anti-inflammatory drugs (NSAID) such as 2-{[3-(Trifluoromethyl) phenyl]amino}benzoic acid. The preliminary in vivo images acquired by the double-tuned ¹H/¹⁹F birdcage resonator demonstrate the feasibility for ¹H/¹⁹F hand- and wrist-imaging at 7 T. While the diagnostic quality of the coil needs to be assessed in patients with inflammatory rheumatoid disease, first ¹⁹F images of the NSAID are encouraging, and point towards the prospect of applying ¹⁹F-MRI to visualize and quantify the concentration of therapeutically-active compound at the sites of inflammation.
Y1  - 2013
SN  - 1545-4428
N1  - ISMRM 21st Annual Meeting & Exhibition, 20-26 April 2013, Salt Lake City, Utah, USA
ER  - 
TY  - JOUR
A1  - Gräßl, Andreas
A1  - Renz, Wolfgang
A1  - Hezel, Fabian
A1  - Dieringer, Matthias A.
A1  - Winter, Lukas
A1  - Özerdem, Celal
A1  - Rieger, Jan
A1  - Kellmann, Peter
A1  - Santoro, Davide
A1  - Lindel, Tomasz D.
A1  - Frauenrath, Tobias
A1  - Pfeiffer, Harald
A1  - Niendorf, Thoralf
T1  - Modular 32-channel transceiver coil array for cardiac MRI at 7.0T
JF  - Magnetic Resonance in Medicine
N2  - Purpose
To design and evaluate a modular transceiver coil array with 32 independent channels for cardiac MRI at 7.0T.

Methods
The modular coil array comprises eight independent building blocks, each containing four transceiver loop elements. Numerical simulations were used for B1+ field homogenization and radiofrequency (RF) safety validation. RF characteristics were examined in a phantom study. The array's suitability for accelerated high spatial resolution two-dimensional (2D) FLASH CINE imaging of the heart was examined in a volunteer study.

Results
Transmission field adjustments and RF characteristics were found to be suitable for the volunteer study. The signal-to-noise intrinsic to 7.0T together with the coil performance afforded a spatial resolution of 1.1 × 1.1 × 2.5 mm3 for 2D CINE FLASH MRI, which is by a factor of 6 superior to standardized CINE protocols used in clinical practice at 1.5T. The 32-channel transceiver array supports one-dimensional acceleration factors of up to R = 4 without impairing image quality significantly.

Conclusion
The modular 32-channel transceiver cardiac array supports accelerated and high spatial resolution cardiac MRI. The array is compatible with multichannel transmission and provides a technological basis for future clinical assessment of parallel transmission techniques at 7.0T.
Y1  - 2013
U6  - https://doi.org/10.1002/mrm.24903
SN  - 1522-2594
VL  - 72
IS  - 1
SP  - 276
EP  - 290
PB  - Wiley-Liss
CY  - New York
ER  - 
TY  - JOUR
A1  - Jens, Otto
A1  - Kaldenhoff, E.
A1  - Kirschner-Hermanns, R.
A1  - Mühl, Thomas
A1  - Klinge, Uwe
T1  - Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates
JF  - Journal of biomedical materials research. Part A
N2  - Use of textile structures for reinforcement of pelvic floor structures has to consider mechanical forces to the implant, which are quite different to the tension free conditions of the abdominal wall. Thus, biomechanical analysis of textile devices has to include the impact of strain on stretchability and effective porosity. Prolift® and Prolift + M®, developed for tension free conditions, were tested by measuring stretchability and effective porosity applying mechanical strain. For comparison, we used Dynamesh-PR4®, which was designed for pelvic floor repair to withstand mechanical strain. Prolift® at rest showed moderate porosity with little stretchability but complete loss of effective porosity at strain of 4.9 N/cm. Prolift + M® revealed an increased porosity at rest, but at strain showed high stretchability, with subsequent loss of effective porosity at strain of 2.5 N/cm. Dynamesh PR4® preserved its high porosity even under strain, but as consequence of limited stretchability. Though in tension free conditions Prolift® and Prolift + M® can be considered as large pore class I meshes, application of mechanical strain rapidly lead to collapse of pores. The loss of porosity at mechanical stress can be prevented by constructions with high structural stability. Assessment of porosity under strain was found helpful to define requirements for pelvic floor devices. Clinical studies have to prove whether devices with high porosity as well as high structural stability can improve the patients' outcome.
Y1  - 2014
U6  - https://doi.org/10.1002/jbm.a.34767
SN  - 1552-4965
VL  - 102
IS  - 4
SP  - 1079
EP  - 1084
PB  - Wiley
CY  - New York
ER  - 
TY  - CHAP
A1  - Hartung, Frank
A1  - Hillgärtner, Michael
A1  - Schmitz, Günter
A1  - Schuba, Marko
A1  - Adolphs, Fabian
A1  - Hoffend, Jens
A1  - Theis, Jochen
T1  - IT-Sicherheit im Automobil
T2  - AmE 2014 : Automotive meets Electronics, Beiträge der 5. GMM-Fachtagung vom 18. bis 19. Februar 2014 in Dortmund. (GMM-Fachbericht ; 78)
Y1  - 2014
SN  - 978-3-8007-3580-8
SP  - CD-ROM
PB  - VDE-Verl.
CY  - Berlin
ER  - 
TY  - BOOK
A1  - Hüning, Felix
T1  - The fundamentals of electrical engineering for mechatronics
Y1  - 2014
SN  - 978-3-11-034991-7 (Druckausg.)
SN  - 978-3-11-030840-2 (E-Book)
PB  - de Gruyter
CY  - Berlin
ER  -