Get Portable Ginkgo CADx Free. Thisis a rather powerful application that allows you to open and analyze DICOM images. You can also use the tool to create the images. The interface of the tool has been kept rather simple and intuitive so as to ensure that those who have basic knowledge regarding computers will have no problem navigating through it. Since it is a portable application, installation is not a requirement prior to usage. You can carry it in USB flash drive, using it when required. Once removed, it does not leave any trace in the Windows Registry.