TY  - JOUR
A1  - Umutlu, Lale
A1  - Orzada, Stephan
A1  - Kinner, Sonja
A1  - Maderwald, Stefan
A1  - Bronte, Irina
A1  - Bitz, Andreas
A1  - Kraff, Oliver
A1  - Ladd, Susanne C.
A1  - Antoch, Gerald
A1  - Ladd, Mark E.
A1  - Quick, Harald H.
A1  - Lauenstein, Thomas C.
T1  - Renal imaging at 7 Tesla: preliminary results
JF  - European Radiology
N2  - Objective
To investigate the feasibility of 7T MR imaging of the kidneys utilising a custom-built 8-channel transmit/receive radiofrequency body coil.

Methods
In vivo unenhanced MR was performed in 8 healthy volunteers on a 7T whole-body MR system. After B0 shimming the following sequences were obtained: 1) 2D and 3D spoiled gradient-echo sequences (FLASH, VIBE), 2) T1-weighted 2D in and opposed phase 3) True-FISP imaging and 4) a T2-weighted turbo spin echo (TSE) sequence. Visual evaluation of the overall image quality was performed by two radiologists.

Results
Renal MRI at 7T was feasible in all eight subjects. Best image quality was found using T1-weighted gradient echo MRI, providing high anatomical details and excellent conspicuity of the non-enhanced vasculature. With successful shimming, B1 signal voids could be effectively reduced and/or shifted out of the region of interest in most sequence types. However, T2-weighted TSE imaging remained challenging and strongly impaired because of signal heterogeneities in three volunteers.

Conclusion
The results demonstrate the feasibility and diagnostic potential of dedicated 7T renal imaging. Further optimisation of imaging sequences and dedicated RF coil concepts are expected to improve the acquisition quality and ultimately provide high clinical diagnostic value.
Y1  - 2011
SN  - 1432-1084
VL  - 21
IS  - 4
SP  - 841
EP  - 849
PB  - Springer
CY  - Berlin
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  - http://dx.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  - 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  - http://dx.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  -