The structure of CDR disk and its writein and readout principles as well as the optical properties,the structure and the synthesizing route of cyanine dyes used as storage medium were briafly introduced.

Methods The DICOM media storage model was based on five basic operations and the two operations were designed according to clinical requirements.

To realize successful communication ,sharing and management without films of imaging data and related information between heterogeneous medical imaging units and systems and promote the information exchange between different operation platforms, implemented the application programs which could realize the function of the DICOM media storage on the platform of Microsoft Visual C++ 6.

On the issue about "Could the mp3 player be heavier after loaded 100MB ",Carry out an in-depth study to the various types of storage media and storage principle since the 1940s.