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. 2014 Mar 26;8:25. doi: 10.3389/fninf.2014.00025

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Copyright © 2014 Bartsch, Thompson, Jernigan and Dale.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Screen capture displaying parts of the hierarchical structure of the PING data dictionary. The branches for “Imaging” and “cortical contrast” have been opened by the viewer. The regular expression used to create the displayed hierarchy level for “Imaging” is “/(H_area|H_thickness|H_contrast|H_volume|H_intensity|Diffusion|H_Fuzzy)/”. The entry “cortical contrast” (H_contrast) is implemented by the pattern “/(^MRI_cort_contrast)/”. In PING this maps to all MRI related cortical contrast measures in the data dictionary (subset displayed on the right).