This study aimed at the assessment and monitoring of digital image quality parameters resulting from use portable X-ray equipment in clinical examinations. A multicentric was conducted for images produced using NOMAD® with DIGORA® ™ Optime UV computed radiography (CR) system. The evaluated terms high- low-contrast spatial resolution, contrast noise ratio (CNR), signal-to-noise (SNR). samples co...

Introduction Selective arterial angiographic information is conventionally achieved using x-ray based digital subtraction angiography (DSA), in which radio-opaque contrast agent is injected under x-ray guidance via a catheter. These x-ray DSA methods are invasive, labor intensive, and carry risks to the patient, most significantly a risk of stroke. For these reasons the valuable dynamic flow in...

Quasars at z > 4 provide direct information on the first massive structures to form in the Universe. Recent ground-based optical surveys (e.g., the Sloan Digital Sky Survey) have discovered large numbers of high-redshift quasars, increasing the number of known quasars at z > 4 to ≈ 500. Most of these quasars are suitable for follow-up X-ray studies. Here we review X-ray studies of the highest r...

We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic rectangular-rounded substrate with an area of 0.1377 cm² through a plasma enhanced chemical vapor deposition system. The stable field emission properties with...

The development of automatic analysis and classification methods for large databases of X-ray images is a pressing need that may have a great impact on clinical practice. To advance this objective the ImageCLEF-2015 clustering of body part X-ray images challenge was created. The aim of the challenge is to group digital X-ray images into five structural groups: head-neck, upper-limb, body, lower...

2 national X ray digital imaging center; Mianyang,China Abstract Beam Hardening effect would be induced due to broad energy spectrum of X-ray. Beam Hardening would lead to artifacts in CT reconstructed images, such as cupping artifact, streak artifact and metal artifact, so that the quality of CT image degrades. One efficient beam hardening correction method is building a mathematical law betwe...

Introduction: Head-and-neck cancer is the sixth most common cancer worldwide with the number of cases consistently increasing in developing countries. Successful development of effective, safe and cost effective nanoprobes for head-and-neck cancer targeting imaging is a big challenge. This study is aimed to develop cysteamine-folate conjugated gold nanoparticles (F-Cys-AuNPs) a...