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. 2015;3(4):315–323.

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© 2015 Old City Publishing, Inc.

Published by license under the OCP Science imprint, a member of the Old City Publishing Group.

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(A) Axial MRI images of liver tumor with adjacent fiducial illustrating pixel value contrast measurement technique. _FID defined as the mean of all the gray scale values within the contour drawn along the outer rim of the fiducial (B) in the dicom image (MRI/X-ray) and _BG was calculated as the mean of all gray scale values of the points measured along the path length (C) of a quadrilateral drawn around the studied fiducial using Image J software.

Inline graphic — (A) Axial MRI images of liver tumor with adjacent fiducial illustrating pixel value contrast measurement technique. _FID defined as the mean of all the gray scale values within the contour drawn along the outer rim of the fiducial (B) in the dicom image (MRI/X-ray) and _BG was calculated as the mean of all gray scale values of the points measured along the path length (C) of a quadrilateral drawn around the studied fiducial using Image J software.