A Virtual Machine is a way to get pre-installed software ready to run on your own system. You might have heard of vGATE for instance used by the OpenGATE project. You can of course install STIR in vGATE using the normal STIR installation instructions. In addition, the SyneRBI project distributes a VM which includes STIR.

1. Get/install the OVA via https://www.ccpsynerbi.ac.uk/downloads/
2. Once this is done, open a Terminal on your VM and type update_VM_to_full_STIR.sh (be patient again).

Your VM will now have an up-to-date version of STIR (and the SIRF software of our related project at http://www.ccpsynerbi.ac.uk/), and also a copy of the STIR-exercises in the ~/devel directory.