Digital breast tomosynthesis (DBT) is an imaging modality in which tomographic sections of the breast are generated from a limited range of x-ray tube angles. One drawback of DBT is resolution loss in the oblique projection images. The purpose of this work is to extend Swank’s formulation of the transfer functions of turbid granular phosphors to oblique x-ray incidence, using the diffusion appr...

The study makes a case for adoption of an industry-wide application solar disinfection (SODIS) in the packaged water at production stage. To do this, 60 samples, comprising 12 brands bottled and 18 sachet-packaged were randomly purchased from street vendors Nsukka, Enugu State, Nigeria investigated. One sample was hidden sunlight while other exposed to day before two samples subjected microbial...

All organisms are confronted with external variations in trace element abundance. To elucidate the mechanisms that maintain metal homeostasis and protect against heavy metal stress, we have determined the transcriptome responses in Drosophila to sublethal doses of cadmium, zinc, copper, as well as to copper depletion. Furthermore, we analyzed the transcriptome of a metal-responsive transcriptio...

Merav Huber Revital Huber Center for Communications and Information Technologies Computer Network Laboratory Faculty of Electrical Engineering Technion, Haifa 32000, Israel Abstract. One result of the recent advances in different components of imaging systems technology is that these systems have become more resolution-limited and less noise-limited. The most useful tool utilized in characteriz...

Various list accessing algorithms have been proposed in the literature and their performances have been analyzed theoretically and experimentally. Move-To-Front (MTF) and Transpose (TRANS) are two well known primitive list accessing algorithms. MTF has been proved to be the best performing online algorithm till date in the literature for real life inputs and practical applications with locality...

We examined the effects of simulated dioptric blur on the degradation of visual acuity using digitally filtered letters. Four types of digital filters were applied to 5 letters (C, D, E, O, and S), constructed to the specifications of Sloan optotypes. These filters were: (1) "normal," designed to simulate the positive and negative lobes of the modulation transfer function (MTF) produced by diop...

Edge detection is one of the most principal techniques for detecting discontinuities in the gray levels of image pixels. The Modulation Transfer Function (MTF) is one of the main criteria for assessing imaging quality and is a parameter frequently used for measuring the sharpness of an imaging system. In order to determine the MTF, it is essential to determine the best edge from the target imag...

In this study, we developed a numerical model of the coupled modulation transfer function (coupled-MTF) based on discrete sampling system from perspective optical imaging quality evaluation for two-dimensional characteristics hexagonally aligned fiber-optic bundles and CCD image elements. The results show that when spatial frequency input target signal deviates Nyquist by 1%, an increase in num...

Carrier transport in signal-processing-in-the-element (SPRITE) detectors is an important phenomenon because it determines properties such as the responsivity and the modulation transfer function (MTF). The previous literature has presented approximate solutions to the transport problem that neglect boundary effects, which have long been thought to play a major role in SPRITE behavior. We presen...

The charge-coupled devices used in electron microscopy are coated with a scintillating crystal that gives rise to a severe modulation transfer function (MTF). Exact knowledge of the MTF is imperative for a good correspondence between image simulation and experiment. We present a practical method to measure the MTF above the Nyquist frequency from the beam blocker's shadow image. The image proce...