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@ARTICLE{Berneking:843635,
      author       = {Berneking, Arne and Gola, Alberto and Ferri, Alessandro and
                      Finster, Felix and Rucatti, Daniele and Paternoster,
                      Giovanni and Shah, N. J. and Piemonte, Claudio and Lerche,
                      Christoph},
      title        = {{A} new {PET} detector concept for compact preclinical
                      high-resolution hybrid {MR}-{PET}},
      journal      = {Nuclear instruments $\&$ methods in physics research / A},
      volume       = {888},
      issn         = {0168-9002},
      address      = {Amsterdam},
      publisher    = {North-Holland Publ. Co.},
      reportid     = {FZJ-2018-01213},
      pages        = {44 - 52},
      year         = {2018},
      abstract     = {This work presents a new PET detector concept for compact
                      preclinical hybrid MR-PET. The detector concept is based on
                      Linearly-Graded SiPM produced with current FBK RGB-HD
                      technology. One 7.75 mm x 7.75 mm large sensor chip is
                      coupled with optical grease to a black coated 8 mm x 8 mm
                      large and 3 mm thick monolithic LYSO crystal. The readout is
                      obtained from four readout channels with the linear encoding
                      based on integrated resistors and the Center of Gravity
                      approach.To characterize the new detector concept, the
                      spatial and energy resolutions were measured. Therefore, the
                      measurement setup was prepared to radiate a collimated beam
                      to 25 different points perpendicular to the monolithic
                      scintillator crystal. Starting in the center point of the
                      crystal at 0 mm / 0 mm and sampling a grid with a pitch of
                      1.75 mm, all significant points of the detector were covered
                      by the collimator beam.The measured intrinsic spatial
                      resolution (FWHM) was 0.74 +/- 0.01 mm in x- and 0.69 +/-
                      0.01 mm in the y-direction at the center of the detector. At
                      the same point, the measured energy resolution (FWHM) was
                      13.01 +/- 0.05 $\%.$ The mean intrinsic spatial resolution
                      (FWHM) over the whole detector was 0.80 +/- 0.28 mm in x-
                      and 0.72 +/- 0.19 mm in y-direction. The energy resolution
                      (FWHM) of the detector was between 13 and 17.3 $\%$ with an
                      average energy resolution of 15.7 +/- 1.0 $\%.$ Due to the
                      reduced thickness, the sensitivity of this gamma detector is
                      low but still higher than pixelated designs with the same
                      thickness due to the monolithic crystals. Combining compact
                      design, high spatial resolution, and high sensitivity, the
                      detector concept is particularly suitable for applications
                      where the scanner bore size is limited and high resolution
                      is required — as is the case in small animal hybrid
                      MR-PET.},
      cin          = {INM-4 / JARA-BRAIN},
      ddc          = {530},
      cid          = {I:(DE-Juel1)INM-4-20090406 / $I:(DE-82)080010_20140620$},
      pnm          = {573 - Neuroimaging (POF3-573)},
      pid          = {G:(DE-HGF)POF3-573},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000425974100007},
      doi          = {10.1016/j.nima.2018.01.040},
      url          = {https://juser.fz-juelich.de/record/843635},
}