Data properties (original data)
============================================================

Test data derived from a simple abdomen CT scan.
 - 161-165:
   - anonymized real life gantry tilt images and represent one block
 - 166:
   - is out of the same series as 161-165 but is in another image block (gap is too far)
 - IM240-IM245:
  - contains synthetic generated tilted data (+18°) from https://sites.google.com/site/dicomnotes/3d-dicom-dataset (folder GTILT)
  - the images used contains a part of sphere with radius 64mm at point (0,0,0)
  - work was done by Bartosz Wiklak under the following terms:

    "Copyright (c) 2010-2011 Bartosz Wiklak <bwiklak@gmail.com>
    
    Redistribution and use, with or without modification, are
    permitted provided that the following condition is met:
    
    Redistributions of the dataset must retain the above copyright notice, this
    condition and the following disclaimer.
    
    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
    ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS PACKAGE, EVEN IF
    ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  
 - IM240_2-IM245_2:
   - copies of files IM240-IM245 from the original image package (GTILT folder) but with a modification,
     which describes a tilt of -23°
 
Data modification for this test set
============================================================

 - downsampled to resolution 64x64 
    (using the helpful dicom2 tool of Sébastien Barré: http://www.barre.nom.fr/medical/dicom2/)

 - anonymized as much as possible by removing or re-inventing patient, institution, protocol data
    (using dcmodify from the DICOM toolkit DCMTK of OFFIS: http://support.dcmtk.org/docs/index.html)

 - IM240_2 - IM245_2:
  - changed orientation to -18° starting with the axial data from https://sites.google.com/site/dicomnotes/3d-dicom-dataset
  - old y vector [0,1,0], new Y vector [0, sin(-23*pi/180), cos(-23*pi/180)]: [0, -0.30902, 0.95106]
  - then the field (0020,0037) Image Orientation was updateded to 1\0\0\0\-0.39073\0.92050 and the field (0018,1120)Gantry/Detector Tilt was updated to -23.0
  
