G713 Development of Ultrasound Diagnosis and Treatment System : Image Reconstruction for Biological Soft Tissues by Diffraction Tomography

Abstract

This paper proposes a basis of a method for ultrasound treatment and diagnosis integration to develop breast cancer therapy. By utilizing the scattering theory based on the linear wave equation in an inhomogeneous media (such as biological soft tissue composed of fat, skin, and lesion), an image reconstruction of sound speed and attenuation coefficient may be performed. We describe in detail a basis of formulation of ultrasound propagation in the inhomogeneous media. Furthermore, we have performed a computation on the sound field of a simplified model of breast during ultrasound exposure toward design of a ring array transducer.