The rise of wireless technology and mobile devices has increased the number and types of resources to be integrated to the grid. As a result, the concept of grid has been enriched and new categories have emerged. One of these new categories is the mobile grid, which include mobile devices as resource providers. Many articles have been written in the past decade about mobile grids. These include surveys, implementations and challenges of this young technology. We want to explore the use of mobile grids for medical image processing and analysis. This impose certain constraints such as the use of C++ and MPI library. We start by evaluating existing implementations of mobile grids under these restrictions. One of our main finding is that the number of available mobile grids is really scarce. BOINC was the open source system more suitable for our research project.