Dual-energy computed tomography (CT) was used to estimate hepatic iron concentration in eight patients with primary haemochromatosis with varying degrees of iron overload. The values corresponded closely with these derived from chemical analysis of liver tissue obtained by biopsy (correlation coefficient 0.993). Dual-energy CT therefore seems to provide an accurate and non-invasive alternative ...

Background: Bisphosphonates (BPs) are used extensively for managing the osteoporosis. There are some controversies on atypical fractures of femur that associated with increase in cortical thickness (CT) and BPs’ use. In this study, the effects of alendronate consumption were studied on femoral CT as a predictor for atypical fracture.   Methods: Forty nine post-menopausal women age...

Introduction: The quality of CT images used for treatment planning of cancer patients is an important issue in accurate outlining of the tumor volume and organs at risk. Different kernels in CT scanner systems are available for improving the image quality. Applying these kernels  on   CT  images  will  change   the   CT  numbers  and  electron   density   of   tissues, conse...

Recent developments in dual-energy X-ray CT have shown a number of benefits over standard CT for object separation, contrast enhancement, artifact reduction, and material composition assessment. As with traditional CT, model-based iterative approaches to reconstruction offer the opportunity to reduce noise and artifacts in dual energy reconstructions. However, previous approaches to model-based...

In this study, high-energy x-ray nanotomography (nano-computed tomography, nano-CT) based on full-field microscopy was developed. Fine two-dimensional and three-dimensional (3D) structures with linewidths of 75 nm–100 nm were successfully resolved in the energy range 15 keV–37.7 keV. The effective field view ∼60 µm, typical measurement time for one tomographic scan 30 min–60 min. optical system...

In CT, the nonlinear attenuation characteristics of polychromatic X-rays cause beam hardening artifacts in the reconstructed images. Statistical algorithms can effectively correct beam hardening artifacts while providing the benefit of noise reduction. In practice, a big challenge for CT is the difficulty at acquiring accurate energy spectrum information, which hinders the efficiency of beam ha...

Content organisation Our cases will be presented in a pictorial essay mode. It is important to consider: The radiologic diagnosis of HCC can be made by either CT or MRI methods. Typically, HCC enhances during the arterial phase due to the presence of an intense arterial blood supply of the hepatic arteries. TC dual Energy: Dual-energy CT (DECT) is an innovative imaging technique that operates o...

The PET and CT fusion images, combining the anatomical and functional information, have important clinical meaning. This paper proposes a novel fusion framework based on adaptive pulse-coupled neural networks (PCNNs) in nonsubsampled contourlet transform (NSCT) domain for fusing whole-body PET and CT images. Firstly, the gradient average of each pixel is chosen as the linking strength of PCNN m...