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 …

We evaluated the performance of an improved hybrid median filter (IHMF) applied to X-ray
computed tomography (CT) images obtained using a high-resolution photon-counting …

Purpose Accurately and precisely estimating the noise power spectrum (NPS) is important
for characterizing the performance of a radiography detector and helpful for improving the …

The noise power spectrum (NPS) of an image sensor provides the spectral noise properties
needed to evaluate sensor performance. Hence, measuring an accurate NPS is important …

The resulting image obtained from an X-ray imaging system depends significantly on the
characteristics of the detector. In particular, when an X-ray image is acquired by thinning the …

In this study, we designed a photon-counting cadmium zinc telluride (CZT) gamma-and X-
ray fusion imaging system and propose a new image processing method to improve image …

Noise power spectrum (NPS) at zero frequency can efficiently represent noise properties of
imaging systems. However, estimations of zero-frequency NPS are susceptible to distortion …

Industrial high-energy X-ray imaging systems are widely used for non-destructive testing
(NDT) to detect defects in the internal structure of objects. Research on X-ray image noise …

Lag signals occur at images sequentially acquired from a flat-panel (FP) dynamic detector in
fluoroscopic imaging due to charge trapping in photodiodes and incomplete readouts. This …

As a method for diagnosing chest lesions, a chest digital tomosynthesis (CDT) X-ray imaging
system based on projection data using a limited angle has been widely used in the medical …