Our calculation system was implemented using a client server system (VT64 Workstation E5‐4S; CPU, Xeon E5‐2670 2.60 GHz (8 cores) × 2; Memory, 32 GB; Operating system, Red Hat Enterprise Linux Server release 6.3: Visual Technology). The calculation program was written in C++ and CUDA 5.018 with open libraries (OpenCV 2.4 and DCMTK 3.6). The client PC (DELL Vostro; CPU Intel Core i7‐3770 3.4 GHz; Memory, 4 GB; Operating system, Windows 7) used a GUI‐based program written in Visual Studio C# with the library OpenCVSharp 2.4.