/usr/lib/libdcmqrdb.so is in libdcmtk2-dev 3.6.0-9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libdcmqrdb.so.2.0.0
/usr/lib/libdcmqrdb.so.2.0.0