Unlike typical files sent over a network that use the .dcm extension, files indexed by a DICOMDIR on physical media cannot have extensions.
Filenames must be strictly uppercase without special characters. DICOMDIR
Contains information regarding the specific medical study, such as Study Instance UID, Date, and Time. Unlike typical files sent over a network that use the
Groups images by acquisition parameters or modality (e.g., CT, MRI). such as Study Instance UID
According to the specifications outlined by NEMA (National Electrical Manufacturers Association) , DICOMDIR follows standard Part 10 file structuring. It features a 128-byte preamble, followed by the letters "DICM" as a magic number, and a sequence of data sets. 2.2 Hierarchical Data Model