Each of the MR instruments at the CMRR has a console host workstation along with physiologic monitoring and paradigm presentation computers. The scanners with Varian consoles (4.0T, 9.4T-31cm, 9.4T-65cm, 16.4T) use Linux workstations while the Siemens consoles (3TA, 3TB, 7T/AS, 7T/PS & soon 10.5T) use Windows based workstations. Each console host is connected by a 10 gigabit per second Ethernet network link for rapid transfer of image data to the data center for post-processing, analysis and storage.
The data center in the CMRR has 80 servers in a 750 sq. ft. room with redundant power (100KW Uninterruptible Power Supply and Diesel Generator) and redundant cooling systems (chilled water and glycol). To handle the enormous amount of image data generated by the 9 MR scanners, thirty (30) of these servers provide NFS file sharing with a total of 375 Terabytes of RAID data storage which supports not only fMRI research, but all other CMRR research. Another eight (8) of the servers are dedicated to backups for disaster recovery contingency with a total of over 2 Petabytes of on-line storage (includes 1 Petabyte of Human Connectome Project data from WUSTL). Thirty two (32) of the CMRR servers are compute nodes, with an aggregate of over 600 CPU cores and 2 Terabytes of RAM memory where the largest single compute server node has 32 cores and 256GB of memory.
Many of the CMRR research projects are extremely compute intensive, such as coil RF model simulations using the FDTD (Finite Difference Time Domain) method, requiring High Performance Computing (HPC) as provided by offloading compute-intensive portions to a Graphic Processing Units (GPU) that can dramatically accelerate computation throughput on the order of a magnitude. Seven (7) of the computes nodes have one or more of 14 total Nvidia Tesla class GPUs that each provide a peak double precision performance on the order of a Teraflops for accelerated computations which is becoming indispensable for the computation loads demands by both RF simulations and multichannel reconstruction. The CMRR has several electromagnetic and thermal simulation software licenses for both Remcom's XFDTD and SPEAG's SEMCAD X as well as licences for general numerical computation and visualization environments such as MATLAB including many toolkits.