Abstract
We have proposed a method to manipulate a thin catheter (less than 0.5 mm in diameter) using acoustic radiation force to achieve treatment in the human body. In this paper, we discuss the theory of acoustic radiation force acting on the catheter from basis of experimental results, which are the ratio of estimated forces from acoustic pressure and actually bending force on the catheter calculated by cantilever theory. The results show that the ratio versus ka (product of wavenumber k and radius of the catheter a) has minimum points, and it suggests that there is an optimal acoustical frequency for manipulating the thin catheter.
