@article{SchlamannVoigtMaderwaldetal.2010,
  author    = {Schlamann, Marc and Voigt, Melanie A. and Maderwald, Stefan and Bitz, Andreas and Kraff, Oliver and Ladd, Susanne C. and Ladd, Mark E. and Forsting, Michael and Wilhelm, Hans},
  title     = {Exposure to high-field MRI does not affect cognitive function},
  series = {Journal of Magnetic Resonance Imaging},
  volume    = {31},
  journal   = {Journal of Magnetic Resonance Imaging},
  number    = {5},
  publisher = {Wiley-Liss},
  address   = {New York},
  issn      = {1522-2586},
  doi       = {10.1002/jmri.22065},
  pages     = {1061 -- 1066},
  year      = {2010},
  abstract  = {Purpose To assess potential cognitive deficits under the influence of static magnetic fields at various field strengths some studies already exist. These studies were not focused on attention as the most vulnerable cognitive function. Additionally, mostly no magnetic resonance imaging (MRI) sequences were performed. Materials and Methods In all, 25 right-handed men were enrolled in this study. All subjects underwent one MRI examination of 63 minutes at 1.5 T and one at 7 T within an interval of 10 to 30 days. The order of the examinations was randomized. Subjects were referred to six standardized neuropsychological tests strictly focused on attention immediately before and after each MRI examination. Differences in neuropsychological variables between the timepoints before and after each MRI examination were assessed and P-values were calculated Results Only six subtests revealed significant differences between pre- and post-MRI. In these tests the subjects achieved better results in post-MRI testing than in pre-MRI testing (P = 0.013-0.032). The other tests revealed no significant results. Conclusion The improvement in post-MRI testing is only explicable as a result of learning effects. MRI examinations, even in ultrahigh-field scanners, do not seem to have any persisting influence on the attention networks of human cognition immediately after exposure.},
  language  = {en}
}
@article{OrzadaMaderwaldPoseretal.2010,
  author    = {Orzada, Stephan and Maderwald, Stefan and Poser, Benedikt Andreas and Bitz, Andreas and Quick, Harald H. and Ladd, Mark E.},
  title     = {RF excitation using time interleaved acquisition of modes (TIAMO) to address B1 inhomogeneity in high-field MRI},
  series = {Magnetic Resonance in Medicine},
  volume    = {64},
  journal   = {Magnetic Resonance in Medicine},
  number    = {2},
  publisher = {Wiley-Liss},
  address   = {New York},
  issn      = {1522-2594},
  doi       = {10.1002/mrm.22527},
  pages     = {327 -- 333},
  year      = {2010},
  abstract  = {As the field strength and, therefore, the operational frequency in MRI is increased, the wavelength approaches the size of the human head/body, resulting in wave effects, which cause signal decreases and dropouts. Several multichannel approaches have been proposed to try to tackle these problems, including RF shimming, where each element in an array is driven by its own amplifier and modulated with a certain (constant) amplitude and phase relative to the other elements, and Transmit SENSE, where spatially tailored RF pulses are used. In this article, a relatively inexpensive and easy to use imaging scheme for 7 Tesla imaging is proposed to mitigate signal voids due to B1 field inhomogeneity. Two time-interleaved images are acquired using a different excitation mode for each. By forming virtual receive elements, both images are reconstructed together using GRAPPA to achieve a more homogeneous image, with only small SNR and SAR penalty in head and body imaging at 7 Tesla.},
  language  = {en}
}
@article{BitzZhouElQuardietal.2009,
  author    = {Bitz, Andreas and Zhou, Yi and El Quardi, Abdessamad and Streckert, Joachim},
  title     = {Occupational Exposure at Mobile Communication Base Station Antenna Sites},
  series = {Frequenz},
  volume    = {63},
  journal   = {Frequenz},
  number    = {7-8},
  issn      = {2191-6349},
  doi       = {10.1515/FREQ.2009.63.7-8.123},
  pages     = {123 -- 128},
  year      = {2009},
  language  = {en}
}
@article{KraffBitzKruszonaetal.2009,
  author    = {Kraff, Oliver and Bitz, Andreas and Kruszona, Stefan and Orzada, Stephan and Schaefer, Lena C. and Theysohn, Jens M. and Maderwald, Stefan and Ladd, Mark E. and Quick, Harald H.},
  title     = {An eight-channel phased array RF coil for spine MR imaging at 7 T},
  series = {Investigative Radiology},
  volume    = {44},
  journal   = {Investigative Radiology},
  number    = {11},
  publisher = {Lippincott Williams \& Wilkins},
  issn      = {1536-0210},
  doi       = {10.1097/RLI.0b013e3181b24ab7},
  pages     = {734 -- 740},
  year      = {2009},
  language  = {en}
}
@article{KlompBitzHeerschapetal.2009,
  author    = {Klomp, D. W. J. and Bitz, Andreas and Heerschap, A. and Scheenen, T. W. J.},
  title     = {Proton spectroscopic imaging of the human prostate at 7 T},
  series = {NMR in Biomedicine},
  volume    = {22},
  journal   = {NMR in Biomedicine},
  number    = {5},
  issn      = {1099-1492},
  doi       = {10.1002/nbm.1360},
  pages     = {495 -- 501},
  year      = {2009},
  language  = {en}
}
@article{LerchlKruegerNiehausetal.2008,
  author    = {Lerchl, Alexander and Kr{\"u}ger, Heike and Niehaus, Michael and Streckert, Joachim R. and Bitz, Andreas and Hansen, Volkert},
  title     = {Effects of mobile phone electromagnetic fields at nonthermal SAR values on melatonin and body weight of Djungarian hamsters (Phodopus sungorus)},
  series = {Journal of Pineal Research},
  volume    = {44},
  journal   = {Journal of Pineal Research},
  number    = {3},
  issn      = {1600-079X},
  doi       = {10.1111/j.1600-079X.2007.00522.x},
  pages     = {267 -- 272},
  year      = {2008},
  language  = {en}
}
@article{ReinhardtBitzElOuardietal.2007,
  author    = {Reinhardt, T. and Bitz, Andreas and El Ouardi, A. and Streckert, J. and Sommer, A. and Lerchl, A. and Hansen, V.},
  title     = {Exposure set-ups for in vivo experiments using radial waveguides},
  series = {Radiation Protection Dosimetry},
  volume    = {124},
  journal   = {Radiation Protection Dosimetry},
  number    = {1},
  issn      = {1742-3406},
  doi       = {10.1093/rpd/ncm370},
  pages     = {21 -- 26},
  year      = {2007},
  language  = {en}
}
@article{SommerBitzStreckertetal.2007,
  author    = {Sommer, Angela M. and Bitz, Andreas and Streckert, Joachim and Hansen, Volkert W. and Lerchl, Alexander},
  title     = {Lymphoma development in mice chronically exposed to UMTS-modulated radiofrequency electromagnetic fields},
  series = {Radiation Research},
  volume    = {168},
  journal   = {Radiation Research},
  number    = {1},
  issn      = {1938-5404},
  doi       = {10.1667/RR0857.1},
  pages     = {72 -- 80},
  year      = {2007},
  language  = {en}
}
@article{SukhotinaStreckertBitzetal.2006,
  author    = {Sukhotina, Irina and Streckert, Joachim R. and Bitz, Andreas and Hansen, Volkert W. and Lerchl, Alexander},
  title     = {1800 MHz electromagnetic field effects on melatonin release from isolated pineal glands},
  series = {Journal of Pineal Research},
  volume    = {40},
  journal   = {Journal of Pineal Research},
  number    = {1},
  issn      = {1600-079X},
  doi       = {10.1111/j.1600-079X.2005.00284.x},
  pages     = {86 -- 91},
  year      = {2006},
  language  = {en}
}
@article{FrankeStreckertBitzetal.2005,
  author    = {Franke, Helmut and Streckert, Joachim and Bitz, Andreas and Goeke, Johannes and Hansen, Volkert and Ringelstein, E. Bernd and Nattk{\"a}mper, Heiner and Galle, Hans-Joachim and St{\"o}gbauer, Florian},
  title     = {Effects of Universal Mobile Telecommunications System (UMTS) electromagnetic fields on the blood-brain barrier in vitro},
  series = {Radiation Research},
  volume    = {164},
  journal   = {Radiation Research},
  number    = {3},
  issn      = {1938-5404},
  doi       = {10.1667/RR3424.1},
  pages     = {258 -- 269},
  year      = {2005},
  language  = {en}
}