DOI: 10.1002/smll.201400037 In nature, refl ecting superposition compound eyes (RSCEs) found in shrimps, lobsters and some other decapods are extraordinary imaging systems with numerous optical features such as minimum chromatic aberration, wide-angle fi eld of view (FOV), high sensitivity to light and superb acuity to motion. Here, we present lifesized, large-FOV, wide-spectrum artifi cial RSC...

We derive a generalised van Cittert-Zernike (vC-Z) theorem for radio astronomy that is valid for partially polarized sources over an arbitrarily wide field-of-view (FoV). The classical vCZ theorem is the theoretical foundation of radio astronomical interferometry, and its application is the basis of interferometric imaging. Existing generalised vC-Z theorems in radio astronomy assume, however, ...

Introduction: Ghost imaging and especially its applications to MR angiography (MRA) have been proposed as an improvement over the conventional magnitude subtraction based imaging methods, such as Fresh Blood Imaging (FBI) [1]. There are basically two types of ghost MRA; type I and II. Type I is usually performed without gating, by summing outside the body ghost artifacts created from uncontroll...

Introduction Balanced steady state free precession (b-SSFP) sequences with large flip angles (between 40o and 70o) are very attractive for abdominal imaging because they provide high signal, a “T2” like contrast and have short TR’s (<10 ms) which are necessary to produce an entire scan within one breathhold. However, they are limited by banding artefacts which appear as bright and dark stripes ...

This paper describes a hybrid optical system using a combination of glass and polymer optics, including aspheric surfaces, in a Wide FOV Head Mounted Display (HMD) for Simulation and Visualisation.

PURPOSE To improve the clinical utility of diffusion-weighted imaging (DWI) by extending the slice coverage of a high-resolution reduced field-of-view technique. THEORY Challenges in achieving high spatial resolution restrict the use of DWI in assessment of small structures such as the spinal cord. A reduced field-of-view method with 2D echo-planar radiofrequency (RF) excitation was recently ...

Background: The magnetic resonance imaging (MRI)-based radiotherapy planning method have been considered in recent years because of the advantages of MRI and the problems of planning with two images modality. The first step in MRI-based radiotherapy is to evaluate magnetic resonance (MR) images geometric distortion. Therefore, the present study aimed to evaluate system related geometric distort...