If you don't have a viewer or it does not work for you, you might try the MicroDicom viewer.The software is developed in Objective-C on a Macintosh platform under the MacOS X operating system using the GNUstep development environment. A multidimensional image navigation and display software was designed for display and interpretation of large sets of multidimensional and multimodality images such as combined PET-CT studies.References Lines and autohoming for comparing series. Multi-images view with series sychronization. Exports to QuickTime, JPEG, JPEG2000, TIFF, BMP. Uncompressed, JPEG, and RLE color and grayscale DICOM images supported. iRad is a DICOM viewer exclusively written for MacOSX.It can also read many other file formats: TIFF (8,16, 32 bits), JPEG, PDF, AVI, MPEG and QuickTime. OsiriX is complementary to existing viewers, in particular to nuclear medicine viewers. OsiriX is an image processing application for Mac dedicated to DICOM images ('.dcm' / '.DCM' extension) produced by equipment (MRI, CT, PET, PET-CT.It is actually the free version of an expensive DICOM viewer. Horos is an open source DICOM viewer for Mac. PostDICOM is one of the best DICOM viewers that offers almost all of the above features.