Measurements of the noise power spectrum for digital x-ray imaging devices

DS Kim - Physics in Medicine & Biology, 2024 - iopscience.iop.org
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 …

Grid artifact reduction for direct digital radiography detectors based on rotated stationary grids with homomorphic filtering

DS Kim, S Lee - Medical physics, 2013 - Wiley Online Library
Purpose: Grid artifacts are caused when using the antiscatter grid in obtaining digital x‐ray
images. In this paper, research on grid artifact reduction techniques is conducted especially …

A novel grid regression demodulation method for radiographic grid artifact correction

Y Yu, J Wang - Medical Physics, 2021 - Wiley Online Library
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 …

Grid artifact reduction in radiography with arctan (1/2)-degree rotated grid

DS Kim, S Lee - 2010 IEEE International Conference on Image …, 2010 - ieeexplore.ieee.org
In order to reduce the grid artifacts in the digital radiography with stationary antiscatter grids,
artifact frequency detection schemes should be adopted and appropriate band-rejection …

Patch based grid artifact suppressing in digital mammography

Q Ling, S Wu, X Duan, G Qin, J Ma… - BioMed Research …, 2018 - Wiley Online Library
The mammography is the first choice of breast cancer screening, which has proven to be the
most effective screening method. An antiscatter grid is usually employed to enhance the …

Grid angle optimization and grid artifact reduction in digital radiography images based on the modulation model

DS Kim - Journal of the Institute of Electronics Engineers of …, 2011 - koreascience.kr
In order to obtain more clear x-ray images, an antiscatter grid, which can absorb the
scattered rays, is employed. In the high-resolution direct digital radiography, however, the …

Grid artifact reduction based on homomorphic filtering in digital radiography imaging

DS Kim, S Lee, JK Yoon - Medical Imaging 2013: Physics of …, 2013 - spiedigitallibrary.org
In digital radiography imaging, the x-ray images are formed based on a multiplicative model,
in which the projected image of an object is multiplied by the antiscatter grid shadow. Hence …

Optimization of the grid frequencies and angles in digital radiography imaging

DS Kim, S Lee - Medical Imaging 2011: Physics of Medical …, 2011 - spiedigitallibrary.org
In order to reduce the grid artifacts, which are caused by using the antiscatter grid in
obtaining x-ray digital images, we analyze the grid artifacts based on the multiplicative …

Ringing artifact reduction for metallic objects in direct digital radiography detectors with stationary antiscatter grids

DS Kim, S Lee - Medical Imaging 2014: Physics of Medical …, 2014 - spiedigitallibrary.org
In digital radiography imaging, the antiscatter grid is usually employed to obtain clear
projected images by absorbing scattered x-ray beams. However, due to the shadow of the …

Artifact reduction in digital radiography images with the stationary grid based on 1-dimensional filters

DS Kim - Journal of the Institute of Electronics Engineers of …, 2010 - koreascience.kr
In order to obtain more clear x-ray images, an antiscatter grid, which can absorb the
scattered rays, is employed. In the high-resolution direct digital radiography, however, the …