@article{LangenZiemonsKiwitetal.1997,
  author    = {Langen, Karl J. and Ziemons, Karl and Kiwit, J{\"u}rgen C. W. and Herzog, Hans and Kuwert, Torsten and Bock, Wolfgang and St{\"o}cklin, Gerhard and Feinendegen, Ludwig E. and M{\"u}ller-G{\"a}rtner, Hans-W.},
  title     = {3-[123I]iodo-α-methyltyrosine and [methyl-11C]-L-methionine uptake in cerebral gliomas: a compara-tive study using SPECT and PET},
  series = {Journal of Nuclear Medicine},
  volume    = {38},
  journal   = {Journal of Nuclear Medicine},
  number    = {4},
  isbn      = {0161-5505},
  pages     = {517 -- 522},
  year      = {1997},
  language  = {en}
}
@article{SchmidtLangenHerzogetal.1997,
  author    = {Schmidt, Daniela and Langen, Karl-J. and Herzog, Hans and Wirths, Jochen and Holschbach, Markus and Kiwit, J{\"u}rgen C. W. and Ziemons, Karl and Coenen, Heinz-H. and M{\"u}ller-G{\"a}rtner, Hans-W.},
  title     = {Whole-body kinetics and dosimetry of L-3[123I]-iodo-α-methyltyrosine},
  series = {European Journal of Nuclear Medicine},
  volume    = {24},
  journal   = {European Journal of Nuclear Medicine},
  number    = {9},
  isbn      = {1619-7089},
  pages     = {1162 -- 1166},
  year      = {1997},
  language  = {en}
}
@incollection{MuellerVeggianKopsQuinetal.2007,
  author    = {M{\"u}ller-Veggian, Mattea and Kops, Elena Rota and Quin, Peng and Herzog, Hans},
  title     = {MRI Based Attenuation Correction for Brain PET Images},
  series = {Advances in medical engineering / [3rd RPT - Remagener Physiktage together with the Second Scientific Workshop of Medical Robotics, Navigation and Visualization ... Remagen ... 7.-9. M{\"a}rz 2007]. Thorsten M. Buzug (ed.) Part 1.},
  booktitle = {Advances in medical engineering / [3rd RPT - Remagener Physiktage together with the Second Scientific Workshop of Medical Robotics, Navigation and Visualization ... Remagen ... 7.-9. M{\"a}rz 2007]. Thorsten M. Buzug (ed.) Part 1.},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-540-68763-4},
  doi       = {10.1007/978-3-540-68764-1_15},
  pages     = {93 -- 97},
  year      = {2007},
  abstract  = {This work describes a procedure to yield attenuation maps from MR images which are used for the absorption correction (AC) of brain PET data. Such an approach could be mandatory for future combined PET and MRI scanners, which probably do not include a transmission facility. T1-weighted MR images were segmented into brain tissue, bone, soft tissue, and sinus; attenuation coefficients corresponding to elemental composition and density as well as to 511 keV photon energy were respectively assigned. Attenuation maps containing up to four compartments were created and forward projected into sinograms with attenuation factors which then were used for AC during reconstruction of FDG-PET data. The commonly used AC based on a radioactive (68Ge) transmission scan served as reference. The reconstructed radioactivity values obtained with the MRI-based AC were about 20\% lower than those obtained with PET-based AC if the skull was not taken into account. Considering the skull the difference was still about 10\%. Our investigations demonstrate the feasibility of a MRI-based AC, but revealed also the necessity of a satisfying delineation of bone thickness which tends to be underestimated in our first approach of T1-weighted MR image segmentation.},
  language  = {en}
}
@article{TersteggeWeberHerzogetal.1996,
  author    = {Terstegge, Andreas and Weber, Stefan and Herzog, H. and M{\"u}ller-G{\"a}rtner, Hans- W. [u.a.]},
  title     = {High resolution and better quantification by tube of responsemodelling in 3D PET reconstruction},
  series = {Selected papers from the 1996 Nuclear Science Symposium : Marriott Hotel, Anaheim, California, November 3rd - November 9th, 1996},
  journal   = {Selected papers from the 1996 Nuclear Science Symposium : Marriott Hotel, Anaheim, California, November 3rd - November 9th, 1996},
  publisher = {Inst. of Electrical and Electronic Engineers},
  address   = {New York},
  pages     = {1603 -- 1607},
  year      = {1996},
  language  = {en}
}
@article{TersteggeWeberHerzogetal.1997,
  author    = {Terstegge, Andreas and Weber, Stefan and Herzog, H. and M{\"u}ller-G{\"a}rtner, Hans- W. [u.a.]},
  title     = {Entwicklung eines Positronen-Emissions-Tomographen mit hoher Ortsaufl{\"o}sung f{\"u}r Labortiere},
  series = {Bildverarbeitung f{\"u}r die Medizin : Algorithmen - Systeme - Anwendungen ; proceedings des Aachener Workshops am 8. und 9. November 1996 / Institut f{\"u}r Medizinische Informatik und Biometrie der RWTH Aachen. Hrsg. von Thomas Lehmann ...},
  journal   = {Bildverarbeitung f{\"u}r die Medizin : Algorithmen - Systeme - Anwendungen ; proceedings des Aachener Workshops am 8. und 9. November 1996 / Institut f{\"u}r Medizinische Informatik und Biometrie der RWTH Aachen. Hrsg. von Thomas Lehmann ...},
  publisher = {Verl. der Augustinus-Buchhandlung},
  address   = {Aachen},
  isbn      = {3-86073-519-5},
  pages     = {267 -- 272},
  year      = {1997},
  language  = {de}
}
@article{BoeckerKuwertLangenetal.1994,
  author    = {Boecker, Henning and Kuwert, Torsten and Langen, Karl-J. and Lange, Herwig W. and Czech, Norbert and Ziemons, Karl and Herzog, Hans and Shikare, Shekar and Weindl, Anton and Feinendegen, Ludwig E.},
  title     = {SPECT with HMPAO compared to PET with FDG in Huntington disease},
  series = {Journal of Computer Assisted Tomography},
  volume    = {18},
  journal   = {Journal of Computer Assisted Tomography},
  number    = {4},
  isbn      = {1532-3145},
  pages     = {542 -- 548},
  year      = {1994},
  language  = {en}
}
@article{HerzogPietrzykShahetal.2010,
  author    = {Herzog, Hans and Pietrzyk, Uwe and Shah, N. Jon and Ziemons, Karl},
  title     = {The current state, challenges and perspectives of MR-PET},
  series = {Neuroimage},
  volume    = {49},
  journal   = {Neuroimage},
  number    = {3},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1053-8119},
  doi       = {10.1016/j.neuroimage.2009.10.036},
  pages     = {2072 -- 2082},
  year      = {2010},
  abstract  = {Following the success of PET/CT during the last decade and the recent increasing proliferation of SPECT/CT, another hybrid imaging instrument has been gaining more and more interest: MR-PET. First combined, simultaneous PET and MR studies carried out in small animals demonstrated the feasibility of the new approach. Concurrently, some prototypes of an MR-PET scanner for simultaneous human brain studies have been built, their performance is being tested and preliminary applications have already been shown. Through this pioneering work, it has become clear that advances in the detector design are necessary for further optimization. Recently, the different issues related to the present state and future prospects of MR-PET were presented and discussed during an international 2-day workshop at the Forschungszentrum J{\"u}lich, Germany, held after, and in conjunction with, the 2008 IEEE Nuclear Science Symposium and Medical Imaging Conference in Dresden, Germany on October 27-28, 2008. The topics ranged from small animal MR-PET imaging to human MR-BrainPET imaging, new detector developments, challenges/opportunities for ultra-high field MR-PET imaging and considerations of possible future research and clinical applications. This report presents a critical summary of the contributions made to the workshop.},
  language  = {en}
}