@article{FiedlerOrzadaFloeseretal.2022,
  author    = {Fiedler, Thomas M. and Orzada, Stephan and Fl{\"o}ser, Martina and Rietsch, Stefan H. G. and Schmidt, Simon and Stelter, Jonathan K. and Wittrich, Marco and Quick, Harald H. and Bitz, Andreas and Ladd, Mark E.},
  title     = {Performance and safety assessment of an integrated transmit array for body imaging at 7 T under consideration of specificabsorption rate, tissue temperature, and thermal dose},
  series = {NMR in Biomedicine},
  volume    = {35},
  journal   = {NMR in Biomedicine},
  number    = {5},
  publisher = {Wiley},
  issn      = {0952-3480 (Print)},
  doi       = {10.1002/nbm.4656},
  pages     = {1 -- 17},
  year      = {2022},
  abstract  = {In this study, the performance of an integrated body-imaging array for 7 T with 32 radiofrequency (RF) channels under consideration of local specific absorption rate (SAR), tissue temperature, and thermal dose limits was evaluated and the imaging performance was compared with a clinical 3 T body coil. Thirty-two transmit elements were placed in three rings between the bore liner and RF shield of the gradient coil. Slice-selective RF pulse optimizations for B1 shimming and spokes were performed for differently oriented slices in the body under consideration of realistic constraints for power and local SAR. To improve the B1+ homogeneity, safety assessments based on temperature and thermal dose were performed to possibly allow for higher input power for the pulse optimization than permissible with SAR limits. The results showed that using two spokes, the 7 T array outperformed the 3 T birdcage in all the considered regions of interest. However, a significantly higher SAR or lower duty cycle at 7 T is necessary in some cases to achieve similar B1+ homogeneity as at 3 T. The homogeneity in up to 50 cm-long coronal slices can particularly benefit from the high RF shim performance provided by the 32 RF channels. The thermal dose approach increases the allowable input power and the corresponding local SAR, in one example up to 100 W/kg, without limiting the exposure time necessary for an MR examination. In conclusion, the integrated antenna array at 7 T enables a clinical workflow for body imaging and comparable imaging performance to a conventional 3 T clinical body coil.},
  language  = {en}
}
@article{KaschSchmidtJahnetal.2021,
  author    = {Kasch, Susanne and Schmidt, Thomas and Jahn, Simon and Eichler, Fabian and Thurn, Laura and Bremen, Sebastian},
  title     = {L{\"o}sungsans{\"a}tze und Verfahrenskonzepte zum Laserstrahlschmelzen von Glas},
  series = {Schweissen und Schneiden},
  volume    = {73},
  journal   = {Schweissen und Schneiden},
  number    = {Heft 1-2},
  publisher = {DVS Verlag},
  address   = {D{\"u}sseldorf},
  isbn      = {0036-7184},
  pages     = {32 -- 39},
  year      = {2021},
  language  = {de}
}
@inproceedings{KaschSchmidtEichleretal.2020,
  author    = {Kasch, Susanne and Schmidt, Thomas and Eichler, Fabian and Thurn, Laura and Jahn, Simon and Bremen, Sebastian},
  title     = {Solution approaches and process concepts for powder bed-based melting of glass},
  series = {Industrializing Additive Manufacturing. Proceedings of AMPA2020},
  booktitle = {Industrializing Additive Manufacturing. Proceedings of AMPA2020},
  publisher = {Springer},
  address   = {Cham},
  isbn      = {978-3-030-54333-4 (Print)},
  doi       = {10.1007/978-3-030-54334-1_7},
  pages     = {82 -- 95},
  year      = {2020},
  abstract  = {In the study, the process chain of additive manufacturing by means of powder bed fusion will be presented based on the material glass. In order to reliably process components additively, new concepts with different solutions were developed and investigated. Compared to established metallic materials, the properties of glass materials differ significantly. Therefore, the process control was adapted to the material glass in the investigations. With extensive parameter studies based on various glass powders such as borosilicate glass and quartz glass, scientifically proven results on powder bed fusion of glass are presented. Based on the determination of the particle properties with different methods, extensive investigations are made regarding the melting behavior of glass by means of laser beams. Furthermore, the experimental setup was steadily expanded. In addition to the integration of coaxial temperature measurement and regulation, preheating of the building platform is of major importance. This offers the possibility to perform 3D printing at the transformation temperatures of the glass materials. To improve the component's properties, the influence of a subsequent heat treatment was also investigated. The experience gained was incorporated into a new experimental system, which allows a much better exploration of the 3D printing of glass. Currently, studies are being conducted to improve surface texture, building accuracy, and geometrical capabilities using three-dimensional specimen. The contribution shows the development of research in the field of 3D printing of glass, gives an insight into the machine and process engineering as well as an outlook on the possibilities and applications.},
  language  = {en}
}