DCMTK - DICOM Toolkit. DCMTK is a collection of libraries and applications implementing large parts the DICOM standard. It includes software for examining, constructing and converting DICOM image files, handling offline media, sending and receiving images over a network connection, as well as demonstrative image storage and worklist servers. DCMTK is is written in a mixture of ANSI C and C++. It comes in complete source code and is made available as ”open source” software. DCMTK has been used at numerous DICOM demonstrations to provide central, vendor-independent image storage and worklist servers (CTNs - Central Test Nodes). It is used by hospitals and companies all over the world for a wide variety of purposes ranging from being a tool for product testing to being a building block for research projects, prototypes and commercial products.