Ralph Dr. Kimmlingen
University of Würzburg
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Publication
Featured researches published by Ralph Dr. Kimmlingen.
Magnetic Resonance in Medicine | 2002
Ralph Dr. Kimmlingen; Matthias Gebhardt; Johann Schuster; Martin Brand; Franz Schmitt; Axel Haase
Peripheral nerve stimulation limits the use of whole‐body gradient systems capable of slew rates > 80 T/m/s and gradient strengths > 25 mT/m. The stimulation threshold depends mainly on the amplitude of the induced electric field in the patients body, and thus can be influenced by changing the total magnetic flux of the gradient coil. A gradient system was built which allows continuous variation of the field characteristics in order to permit the use of full gradient performance without stimulation (slew rate 190–210 T/m/s, Gmax 32–40 mT/m). The system consists of a modular six‐channel gradient coil designed with a modified target field method, two three‐channel amplifiers, and a six‐channel gradient controller. It is demonstrated that two coils on one gradient axis can be driven by two amplifiers in parallel, without significant changes in image quality. Scaling of the field properties and stimulation threshold according to the current polarity and ratio of both coil sets was verified in both phantom and volunteer studies. Magn Reson Med 47:800–808, 2002.
Archive | 2012
Sascha Fath; Ralph Dr. Kimmlingen; Johann Schuster
Archive | 2011
Ralph Dr. Kimmlingen; Helmut Lenz; Eva Eberlein; Franz Schmitt
Archive | 2011
Sascha Fath; Ralph Dr. Kimmlingen; Johann Schuster
Archive | 2011
Ralph Dr. Kimmlingen; Eva Eberlein; Franz Schmitt; Johann Schuster
Archive | 2009
Eva Eberlein; Ralph Dr. Kimmlingen
Archive | 2008
Sascha Fath; Ralph Dr. Kimmlingen; Lothar Schön; Johann Schuster; Stefan Stocker
Archive | 2007
Peter Dietz; Eva Eberlein; Ralph Dr. Kimmlingen; Andreas Krug; Johann Schuster; Stefan Stocker
Archive | 2006
Peter Dietz; Ralph Dr. Kimmlingen; Johann Schuster; Stefan Stocker
Archive | 2006
Peter Dietz; Ralph Dr. Kimmlingen; Johann Schuster; Stefan Stocker