COVID-19 CT image denoising algorithm based on adaptive threshold and optimized weighted median filter
S Guo, G Wang, L Han, X Song, W Yang - Biomedical Signal Processing …, 2022 - Elsevier
CT image of COVID-19 is disturbed by impulse noise during transmission and acquisition.
Aiming at the problem that the early lesions of COVID-19 are not obvious and the density is …
Aiming at the problem that the early lesions of COVID-19 are not obvious and the density is …
Iterative image-domain ring artifact removal in cone-beam CT
Ring artifacts in cone beam computed tomography (CBCT) images are caused by pixel gain
variations using flat-panel detectors, and may lead to structured non-uniformities and …
variations using flat-panel detectors, and may lead to structured non-uniformities and …
Software architecture for multi-bed FDK-based reconstruction in X-ray CT scanners
Most small-animal X-ray computed tomography (CT) scanners are based on cone-beam
geometry with a flat-panel detector orbiting in a circular trajectory. Image reconstruction in …
geometry with a flat-panel detector orbiting in a circular trajectory. Image reconstruction in …
A ring artifact correction method: Validation by micro-CT imaging with flat-panel detectors and a 2D photon-counting detector
We introduce an efficient ring artifact correction method for a cone-beam computed
tomography (CT). In the first step, we correct the defective pixels whose values are close to …
tomography (CT). In the first step, we correct the defective pixels whose values are close to …
Removal of ring artifacts in CT imaging through detection and correction of stripes in the sinogram
Due to malfunctioning and mis-calibration of cells in digital x-ray detectors as well as
impurities on the scintillator screens, stripe artifacts arise in the sinogram which in turn …
impurities on the scintillator screens, stripe artifacts arise in the sinogram which in turn …
Removing ring artefacts for photon-counting detectors using neural networks in different domains
The development of energy-resolving photon-counting detectors provides a new approach
for obtaining spectral information in computed tomography. However, the responses of …
for obtaining spectral information in computed tomography. However, the responses of …
Adaptive probability filter for removing salt and pepper noises
J Chen, Y Zhan, H Cao, X Wu - IET Image Processing, 2018 - Wiley Online Library
To overcome the drawbacks of existing filters for salt and pepper noises, an adaptive
probability filter is proposed. For an image, it detects salt and pepper noises based on the …
probability filter is proposed. For an image, it detects salt and pepper noises based on the …
Ring artifacts removal from synchrotron CT image slices
Ring artifacts can occur in reconstructed images from x-ray Computerized Tomography (CT)
as full or partial concentric rings superimposed on the scanned structures. Due to the data …
as full or partial concentric rings superimposed on the scanned structures. Due to the data …
Ring artifacts correction for computed tomography image using unsupervised contrastive learning
Objective. Computed tomography (CT) is a widely employed imaging technology for disease
detection. However, CT images often suffer from ring artifacts, which may result from …
detection. However, CT images often suffer from ring artifacts, which may result from …
Ring artifact correction using detector line-ratios in computed tomography
Ring artifacts in computed tomography (CT) images degrade image quality and obscure the
true shapes of objects. While several correction methods have been developed, their …
true shapes of objects. While several correction methods have been developed, their …