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@ARTICLE{Wagenknecht:131826,
      author       = {Wagenknecht, Gudrun and Kaiser, Hans-Jürgen and Mottaghy,
                      Felix M. and Herzog, Hans},
      title        = {{MRI} for attenuation correction in {PET}: methods and
                      challenges},
      journal      = {Magnetic resonance materials in physics, biology and
                      medicine},
      volume       = {26},
      number       = {1},
      issn         = {1352-8661},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2013-01090},
      pages        = {99-113},
      year         = {2013},
      abstract     = {Abstract In current combined PET/MR systems, PET
                      attenuation correction is based on MRI, since the small bore
                      insideMRI systems and the strongmagnetic field do not permit
                      a rotating PET transmission source or a CT device to be
                      integrated. Unlike CTmeasurements in PET/CT scanners, the MR
                      signal is not directly correlated to tissue density andthus
                      cannot be converted by a simple transformation of intensity
                      values. Various approaches have been developed based on
                      templates, atlas information, direct segmentation of
                      T1-weighted MR images, or segmentation of images from
                      special MR sequences. The advantages and disadvantages of
                      these approaches as well as additional challenges will be
                      discussed in this review.},
      cin          = {ZEL / INM-4 / ZEA-2},
      ddc          = {610},
      cid          = {I:(DE-Juel1)ZEL-20090406 / I:(DE-Juel1)INM-4-20090406 /
                      I:(DE-Juel1)ZEA-2-20090406},
      pnm          = {332 - Imaging the Living Brain (POF2-332)},
      pid          = {G:(DE-HGF)POF2-332},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid: 23179594},
      UT           = {WOS:000314888300009},
      doi          = {10.1007/s10334-012-0353-4},
      url          = {https://juser.fz-juelich.de/record/131826},
}