PURPOSE To assess the visualization of the retinal microvasculature with intravenous fluorescein angiography (IVFA) compared to the Retinal Function Imager (RFI). DESIGN Multicenter, retrospective, observational case series. METHODS Seven normal eyes and 26 eyes with various ocular diseases were imaged with both IVFA and the RFI. The ability to assess vessel loops, vertical collateral vesse...

A radio frequency interference (RFI) excision algorithm based on spectral domain statistics is proposed and implemented in software. The algorithm requires the use of two memory buffers, S1 and S2, in which the first two powers of M power spectral density (PSD) estimates, obtained via Fast Fourier Transform (FFT), are accumulated and used to form a Spectral Kurtosis (SK) estimator, M(MS2/S 1 − ...

In this paper we present an interference detection toolbox consisting of a high dynamic range Digital Fast-FourierTransform spectrometer (DFFT, based on FPGA-technology) and data analysis software for automated radio frequency interference (RFI) detection. The DFFT spectrometer allows high speed data storage of spectra on time scales of less than a second. The high dynamic range of the device a...

The growing level of radio frequency interference (RFI) is a recognized problem for research in radio astronomy. This paper describes an intuitive but powerful RFI cancellation technique that is suitable for radio spectroscopy where time-averages are recorded. An RFI ““ reference signal,ÏÏ is constructed from the cross power spectrum of the signals from the two polarizations of a reference horn...

This paper gives a summary of the results of a radio frequency interference mitigation project. Radio frequency interference (RFI) is a problem radio astronomers are facing increasingly in recent years. The goals of this project were: 1) investigate the cost vs. benefits of real-time RFI flagging, 2) determine ways of statistically flagging RFI by doing noise simulations, and 3) to develop a vi...

This paper addresses techniques of Radio Frequency Interference (RFI) suppression applied to Synthetic Aperture Radar (SAR) data. These techniques could also be used to protect radio-astronomical observations from harmful interference. Of the RFI suppression techniques investigated, the notch filter and the Least Mean Squares (LMS) adaptive filter have been implemented and applied to real P-ban...

Animals selected for residual feed intake (RFI) can be used as a model to elucidate molecular explanations for differences in growth efficiency. The objective of this study was to determine the extent to which the protein profile and posttranslational modifications of mitochondria from skeletal muscle and liver relate to feed efficiency gains in pigs divergently selected for RFI. Mitochondria w...