Medical imaging with nonlinear waveform inversion (nlwi) system using recurrent neural network

Abstract

A system for recovering physical properties from a non-linear medium includes a wave field modeler, a properties adjuster and a medium properties recoverer. The wave field modeler models a wave field generated by a transmitted pulse traveling in the non-linear medium and generates a predicted transducer output from the modeled wave field. The wave field modeler is a neural network having a neural network representation of a non-linear wave function of the physical properties of the wave field. The properties adjuster optimizes a loss function between the predicted transducer output and a measured transducer output and generates an improved set of the physical properties. The properties adjuster operates a backpropagator using the neural network representation and activates the wave field modeler with the improved set of the physical properties. The medium properties recoverer outputs a current improved set of the physical properties once the properties adjuster finishes operation.