Figure 2.

Framework for the construction of a parallel workflow tool for brain MRI post-processing. The sections with gray backgrounds represent important aspects of the construction of a parallel workflow tool. In the workflow section, the three blue nodes represent the same post-processing jobs from three different subjects and are therefore independent. The two green nodes indicate two independent post-processing jobs for the same subject. The arrows denote dependencies; for example, A→B indicates that B cannot start until A is complete. Thus, independent jobs can be parallelized to maximize the use of available computing resources. HPC, High-Performance Computing; SGE, Sun Grid Engine; PBS, Portable Batch System.