The aim of this study was to evaluate the application feasibility of the nonlocal means (NLM)
noise reduction algorithm in low-dose computed tomography (CT) images using an …

Low-dose computed tomography (LDCT) can effectively reduce radiation exposure in
patients. However, with such dose reductions, large increases in speckled noise and streak …

The never-ending quest for lower radiation exposure is a major challenge to the image
quality of advanced CT scans. Post-processing algorithms have been recently proposed to …

BACKGROUND: Image reconstruction for realistic medical images under incomplete
observation is still one of the core tasks for computed tomography (CT). However, the stair …

Low-dose computed tomography (LDCT) has attracted significant attention in the domain of
medical imaging due to the inherent risks of normal-dose computed tomography (NDCT) …

Radiation dose has raised significant concerns to patients and operators in modern X-ray
computed tomography (CT) examinations. A simple and cost-effective means to perform a …

Radiation dose from CT scans is an increasing health concern in the practice of radiology.
Higher dose scans can produce clearer images with high diagnostic quality, but may …

Noise in computed tomography (CT) is inevitably generated, which lowers the accuracy of
disease diagnosis. The non-local means approach, a software technique for reducing noise …

In this study, we applied the fast non-local means (FNLM) algorithm to high-pitch low-dose
computed tomography (CT) images using a tin-filter. This study was conducted via a …

Optimal noise control is important for improving image quality and reducing radiation dose in
computed tomography. Here we investigated two image space based nonlinear filters for …