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. Author manuscript; available in PMC: 2013 Nov 7.
Published in final edited form as: IEEE Trans Med Imaging. 2003 Aug;22(8):10.1109/TMI.2003.815868. doi: 10.1109/TMI.2003.815868

Fig. 4.

Fig. 4

The watermelon phantom used in this paper for registration accuracy experiments. (a) Watermelon with Omnipaque soaked twine laid into carved vessel grooves. (b) Acustar imaging marker filled with CT/MR contrast enhancement fluid. (c) Acustar divot caps for localization using Optotrak.