Objective. The noise characteristics of digital x-ray imaging devices are determined by
contributions such as photon noise, electronic noise, and fixed pattern noise, and can be …

Purpose Electronic portal images are one of the most important tools to verify the ongoing
radiotherapy treatment through comparison with a reference image generated during …

Single-grid-based phase-contrast x-ray imaging (SG-PCXI) is a single-exposure, non-
interferometric method for the simultaneous retrieval of absorption, differential phase …

Objective. To implement a hybrid method, which combines analytical tracking and
interaction simulation using Monte Carlo (MC) techniques, in order to model photon …

Anti-scatter grids are used in fluoroscopic systems to improve image quality by absorbing
scattered radiation. A stationary Smit Rontgen X-ray grid (line density: 70 lines/cm, grid ratio …

Although physical grids improve contrast in radiographic images by reducing scattered
radiation, various artifacts such as grid shadow, moire, and cutoff result in increased patient …

In radiography, an antiscatter grid is a well-known device for eliminating unexpected x-ray
scatter. We investigate a new stationary grid artifact suppression method based on a …

The noise power spectrum (NPS) at zero frequency can represent a global noise property of
a system and is the sum of the covariances with lags. As the lag increases, an estimate of …

In this study, we propose a modification to a single-grid phase-contrast x-ray imaging (PCXI)
system using a Fourier domain analysis technique to extract absorption, scattering, and …

Purpose In x‐ray radiography, the commonly used antiscatter grid for enhancing image
quality causes artifacts in the form of periodic noises, such as shadows, cutoff, and Moiré …