The present paper describes laboratory tests on steady granular flows down a smooth chute using X-ray radiography. By an original set-up with gate at its end, standing discontinuites in height, velocity and density, namely jumps, were produced during the flows. radiography was successful to get consistent measurements of free-surface density profiles along under different flow states: (nearly) ...

X-Rays are used as reliable technique for today’s quality assurance of safety critical parts, for example in the automotive or in the aerospace industry. Radiography systems are used to ensure a high throughput in the field of hundred percent testing of a batch. In such systems digital images are acquired by using either flat-panel detectors with a high dynamic range or image intensifiers inclu...

Materials that exhibit X-ray-excited luminescence have great potential in radiation detection, security inspection, biomedical applications and X-ray astronomy1–5. However, high-performance materials are almost exclusively limited to ceramic scintillators, which typically prepared under high temperatures6. Herein we report metal-free organic phosphors based on a molecular design supports effici...

conclusion radiology equipment in tehran university of medical sciences have potential capacity, but they need repair, and better maintenance and management and application of standards for the imaging system needs organized supervisory mechanisms. materials and methods the study was performed in 16 hospitals, 4 faculties and three healthcare centers of tehran university of medical sciences. we...

Cosmic-ray muons (CRM) arriving from the sky on the surface of the earth are now known to be used as radiography purposes to explore the inner-structure of large-scale objects and landforms, ranging in thickness from meter to kilometers scale, such as volcanic mountains, blast furnaces, nuclear reactors etc. At the same time, by using muons produced by compact accelerators (CAM), advanced radio...

conclusions despite close concordance between ultrasonography and chest radiography, ceus is not a suitable alternative for standard chest radiography in detecting cvc location; however, considering its high sensitivity and acceptable specificity in our study, its usefulness as a triage method for detecting cvc location on a real-time basis in the operating room cannot be ignored. results chest...

Scattering muon radiography was proposed recently as a technique of detection and 3-d imaging for dense high-Z objects . High-energy cosmic ray muons are deflected in matter in the process of multiple Coulomb scattering . By measuring the deflection angles we are able to reconstruct the configuration of high-Z material in the object . We discuss the methods for information extraction from muon ...

Conventional x-ray computed tomography (CT) produces a single volumetric image that represents the spatially variant linear x-ray attenuation coefficient of an object. However, in many situations, differences in the x-ray attenuation properties of soft tissues are very small and difficult to measure in conventional x-ray imaging. In this work, we investigate an analyzer-based imaging method, ca...