Limitations

The limitations of the Menelik model arose from human errors and approximations during model construction and the defects in the VHP dataset. Human errors could have probably been introduced during the manual segmentation of the color image slices of the VHP dataset. This would manifest as minor errors in the traces of the boundary of the segmented anatomical structures.  Moreover, approximations may have introduced during boundary overlaps and gaps resolving stage of the surface mesh model construction. The boundary overlaps and gaps were introduced from the preceding stage of surface simplification, smoothing, and cleaning. Small gaps were merged with adjacent structures; and overlapping boundaries were resolved by Boolean substraction. However, the dimension of the gaps and overlapped boundaries are much smaller compared to the dimension of the anatomical structures; thus, the approximation has negligible effect in computational results.

The Menelik mesh model was tested for FEM meshability using ACIS SAT version 26 file format in CST Studio 2017. The ACIS SAT format is the native format of CST Studio and it has higher precision point representation compared to STL format. It is recommended to use the ACIS SAT format in CST Studio for mesh based simulation. Also, the provided CST header file for the voxel format (``CST-Material.txt ") contains material properties defined for 100 MHz. Users can change the material properties defined for other frequencies after importing the voxel data in CST Studio.