  Computer-aided surgery intensively uses the concept of navigation: after
having collected CT data from a patient and transferred them to the operating
room coordinate system, the surgical instrument (a puncture needle for
instance) is localized and its position is visualized with respect to the
patient organs which are not directly visible. This approach is very similar to
the GPS paradigm. Traditionally, three orthogonal slices in the patient data
are presented on a distant screen. Sometimes a 3D representation is also added.
In this study we evaluated the potential of adding a smart phone as a
man-machine interaction device. Different experiments involving operators
puncturing a phantom are reported in this paper.
