Article
Refine
Year of publication
- 2011 (178) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (65)
- INB - Institut für Nano- und Biotechnologien (36)
- Fachbereich Elektrotechnik und Informationstechnik (25)
- Fachbereich Chemie und Biotechnologie (22)
- Fachbereich Wirtschaftswissenschaften (19)
- IfB - Institut für Bioengineering (18)
- Fachbereich Energietechnik (13)
- Fachbereich Bauingenieurwesen (12)
- Fachbereich Maschinenbau und Mechatronik (10)
- Fachbereich Luft- und Raumfahrttechnik (9)
Has Fulltext
- no (178) (remove)
Document Type
- Article (178) (remove)
Keywords
- High field MRI (1)
- MR safety (1)
- MRI (1)
- Magneto alert sensor (1)
- Pornographie (1)
- Uktrahigh field MRI (1)
- Zuschauer (1)
- avalanche (1)
- snow (1)
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.
Das Ziel des Deutschen Corporate Governance Kodex (DCGK) besteht in der Verbesserung der Transparenz und Qualität der deutschen Corporate Governance, wobei die Sanktionierung der Nichteinhaltung des DCGK einzig durch etwaige Kapitalmarktreaktionen erfolgt. Folgende Befunde sprechen jedoch dafür, dass durch die Abgabe der Entsprechenserklärung gem. § 161 AktG die für das Enforcement des Kodex angenommene Selbstregulierung durch den Kapitalmarkt nicht stattfindet, und demnach Verbesserungsbedarf besteht
Anmerkung zu EuGH, Urt. v. 1.3.2011, Rs. C-236/09 Association belge des Consomma-teurs Test-Achats
(2011)
Möglichkeiten und Grenzen der Anwendbarkeit statisch nichtlinearer Verfahren nach DIN EN 1998-1
(2011)
Reasoning with Qualitative Positional Information for Domestic Domains in the Situation Calculus
(2011)
One-chip integrated dual amperometric/field-effect sensor for the detection of dissolved hydrogen
(2011)
Lignocellulosic biorefinery: Process integration of hydrolysis and fermentation (SSF process)
(2011)
The aim of the present work is the process integration and the optimization of the enzymatic hydrolysis of wood and the following fermentation of the products to ethanol. The substrate is a fiber fraction obtained by organosolv pre-treatment of beech wood. For the ethanol production, a co-fermentation by two different yeasts (Saccharomyces cerevisiae and Pachysolen tannophilus) was carried out to convert glucose as well as xylose. Two approaches has been followed: 1. A two step process, in which the hydrolysis of the fiber fraction and the fermentation to product are separated from each other. 2. A process, in which the hydrolysis and the fermentation are carried out in one single process step as simultaneous saccharification and fermentation (SSF). Following the first approach, a yield of about 0.15 g ethanol per gram substrate can be reached. Based on the SSF, one process step can be saved, and additionally, the gained yield can be raised up to 0.3 g ethanol per gram substrate.