We propose a new strategy for true amplitude migration of PS converted waves. Supplementary to PP imaging for AVO analysis this provides additional constraints for the shear properties of the target layer. Our method needs only coarse1 gridded travel-tune information as input data. The coefficients for a fast and accurate traveltime interpolation algorithm and the weight functions are computed on the fly. This makes the method highly efficient in terms of computational time, and particularly storage. A synthetic example demonstrates the method.