Some changes which had to be made for the ITK 4 migration broke the 2D interpolation. Currently the interpolation is just working in the axial slice.
[519cd3]: Merge branch 'bug-15452-broken-2d-interpolation-integration'
2013-06-26 18:10:44 Andreas Fetzer [372aa7]
Removed duplicate declarations
2013-06-26 18:10:28 Andreas Fetzer [69eb22]
Merge branch 'bug-15452-broken-2d-interpolation' into bug-15452-broken-2d-interpolation-integration
2013-06-26 14:53:09 Andreas Fetzer [4abd2d]
Fixed missing declaration
2013-06-26 14:27:24 Andreas Fetzer 
2D interpolation is now working for 4d images
2013-06-26 14:18:54 Andreas Fetzer [3023c2]
Fixed 2d interpolation