dcm The .dcm extension files are raster image format files that are universally used by the medical community for creating and storing body scans of patients. This format was developed by NEMA (National Electrical Manufacturers Association) and is primarily associated with the DICOM (Digital Imaging and Communications in Medicine) image format files.
bmp The bitmap image file format or bmp file for short, is a raster graphics image file. It uses a dot matrix data structure to represent pixelated points of color and to store digital image information. The format optionally supports compression and has wide cross platform support on all the major computer operating systems. Because bmp files are raster graphics files, image resolution is constrained meaning images in this format will not scale without loss in quality. This is in contrast to vector graphics images that can scale to arbitrary resolutions.