introduction: the medical applications of ultrasound on human brain are highly limited by the phase and amplitude aberrations induced by the heterogeneities of the skull. however, it has been shown that time reversing coupled with amplitude compensation can overcome these aberrations. in this work, a model for 2d simulation of the time reversal mirror technique is proposed to study the possibil...

Abstract Aim The primary objective of this study is to estimate the incidence rectal carcinoma in patients with an Inflammatory Bowel Disease diagnosis, who have had a total colectomy preserving rectum. secondary objectives are identify risk factors associated malignancy occurrence and explore current recommendations for screening processes these patients. Method A systematic review 5 databases...

A preliminary investigation is presented of horizontal sound field control using a rectangular array of spherical wave driving sources, with focus on wide area plane wave reproduction. Comparison is made between Wave Field Synthesis and a method based on distributed pressure and velocity constraints. Advantages of the second approach are discussed, and modifications of the both methods are prop...

Abstract Optical devices capable of suppressing diffraction nature light are great technological importance to many nanophotonic applications. One important technique achieve diffractionless optics is exploit field canalization effect. However, current platforms based on metamaterial structures typically suffer from strict loss-confinement trade-off, or lack dynamic reconfigurability over devic...

In some geophysical problems, it is sometimes possible to divide the subsurface resistivity distribution as a one dimensional (1D) contribution plus some two dimensional (2D) inhomogeneities. Assuming this scenario, we split the electromagnetic fields into their primary and secondary components, the former corresponding to the 1D contribution, and the latter to the 2D inhomogeneities. While the...

INTRODUCTION While the standard adjuvant therapy for rectal cancer includes radiation therapy (RT) and chemotherapy (CT), the optimal treatment combination and sequencing have yet to be determined. In recent years, a large number of clinical trials have been reported in this rapidly evolving field. MATERIALS AND METHODS A review of pivotal trials in rectal cancer was undertaken with a focus o...