$ sudo apt-get update
$ sudo apt-get install libdcmtk5 

libdcmtk5 is installed in your system.

Make ensure the libdcmtk5 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libdcmtk5 *

You will get with libdcmtk5 package name, version, architecture and description in a table

libdcmtk5 package basic information: