DICOM is short for Digital Imaging and Communications in Medicine. The files are using the common file format DICOM.

90% of all DCM files belong to DICOM medical imaging bitmap.

However, the following two file formats are common:

This DCM file itself is among the most popular common file types and primarily uses a special format that can be read by various programs. Our analysis of the DCM files produces the following result: If there are problems opening a file, you must first determine the file format used. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. The signature can be used to infer the file format. The initial characters of a file are called signature, sometimes also 'magic bytes'. If you can determine the file format, the associated program also can be determined. This file format is classified as Raster Image. You can open, edit, and export DCM images using XnView. XnView is a free, cross-platform image manipulation program available for Windows, macOS, Linux and mobile platforms. Just drag the file onto this browser window and drop it. You can also display a DCM file directly in the browser. Then click 'Open with' and choose an application. If you cannot open your DCM file correctly, try to right-click or long-press the file. Without proper software you will receive a Windows message ' How do you want to open this file?' or ' Windows cannot open this file' or a similar Mac/iPhone/Android alert. You need a suitable software like Photoshop to open a DCM file. DiskCatalogMaker disk management program saves its catalog database in a DCM file. Address book data and machine settings used by Canon's imageRUNNER multifunction digital copiers, can be exported as a device configuration information file that has DCM filename extension. 3D Slicer biomedical imaging program saves geometry data in a DCM file.

DCM is also the filename extension of a component library file used by kiCad electronic schematic design and automation software. Pixel data stored in this DCM file may be compressed in various formats including RLE, ZIP, and lossless/lossy JPEG. Additional information such as patient's information can also be embedded alongside the image in the same file. This DCM file is used to store and distribute medical images such as those from ultrasound, MRI, and CT scans. A DCM file usually contains a 2D or 3D image saved in DICOM raster image format. DCM files mostly belong to Photoshop by Adobe.

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