/usr/ is in libismrmrd-dev 1.3.3-1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ismrmrd/dataset.h
/usr/include/ismrmrd/export.h
/usr/include/ismrmrd/ismrmrd.h
/usr/include/
/usr/include/ismrmrd/
/usr/include/ismrmrd/meta.h
/usr/include/ismrmrd/version.h
/usr/include/ismrmrd/xml.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/ISMRMRD/
/usr/lib/x86_64-linux-gnu/cmake/ISMRMRD/ISMRMRDConfig.cmake
/usr/share/
/usr/share/doc/
/usr/share/doc/libismrmrd-dev/
/usr/share/doc/libismrmrd-dev/copyright
/usr/lib/x86_64-linux-gnu/libismrmrd.so
/usr/share/doc/libismrmrd-dev/changelog.Debian.gz