Hello,
 I am not very familiar with CentOS, but Wiki says that CentOS 7 was released in 2014, with full updates ending in 2020. I wonder if it does not the modern widget sets. Do some of the older releases work? 

https://www.nitrc.org/frs/?group_id=152

You could also try the pre-release for the upcoming version
  https://github.com/neurolabusc/MRIcron/releases
as noted in the release notes, the latest version expects libqt5pas, which you may be able to install from a rpm:
 https://github.com/davidbannon/libqt5pas/releases/tag/v1.2.9