DICOM is a bitmap file format used in digital imaging and data exchange in medicine. DICOM standard was developed by NEMA (National Electrical Manufacturers Association). DICOM standardized viweing and excanging medical image data such as computer tomography, magnetic resonance imaging, and ultrasonography.

DICOM files can also store patient data for which image has been taken. DICOM files can be viewed using a web browser. Sometimes DICOM files are saved with DCM file suffix.