Medical transducer arrays using composite materials for acoustic matching layers

The vibration mode of the arrays with two matching layers is studied by simulation of finite elements. The results obtained by the simulation indicate that the Poisson´s ratio of the matching layers gives great effect on the vibration mode of the array. That is, the characteristics of the array are improved, as Poisson´s ratio is smaller. For such materials to be realized, carbon fiber-epoxy and Dyneema-polyurethane unidirectional composite materials for matching layers are proposed, and the simulation results based on the data of those materials are presented.