Ensure your data set is uncompressed. If you were sent a compressed file you will have to extract the data to open it.
Ensure your file was sent as a Multi-File DICOM with .dcm extension as this is the universal file type.
If you continue to experience issues opening your data set please contact Osteoid Software Support at 408.333.3484 ext. 2 or support@osteoidinc.com for further assistance.