Towards 3D Synthetic Aperture Radar Echography

Abstract

object. To this end, measuring the vibrations associated with parts of a target would provide important information that can be used to accomplish the above task.Numerous works have been carried out in the field of sonic imaging, especially in the medical field, through the use of ultrasound. Theoretical studies made in the early 1980's suggest that ultrasonic imaging using correlation technique can overcome some of the drawbacks of classical pulse echography. In [1] efficient high-resolution techniques are described by transmitting coded signals. High-frequency transducers, up to 35-50MHz, are widely used in ophthalmic echography to image fine eye structures. In [2] the first highfrequency echographic images obtained with the prototype probe are presented. Authors of [3] describe a pulse-echo ultrasound method for measuring nonlinear waveform distortion, and reporting the design, construction, and experimental characterization of the first mechanical scanning probe for ophthalmic echography based on a small piezoelectric ultrasound motor. The work in [4] presents a novel method for line restoration in speckle images. In particular, this task is addressed as a sparse estimation problem using both convex and non-convex optimization techniques based on the Radon transform and sparsity regularization. Lung ultrasound imaging is a fast-evolving field of application for ultrasound technologies. Authors of [5] design an image formation process to work on lung tissue, and ultrasound images generated with four orthogonal bands centered at 3, 4, 5 and 6 MHz can be acquired and displayed in real time.