Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40645-017-0143-8/MediaObjects/40645_2017_143_Fig5_HTML.gif)
Research flow of adjoint tomography in the present study. The computational cost estimated for the K computer is also shown
Research flow of adjoint tomography in the present study. The computational cost estimated for the K computer is also shown