X-ray CT assisted damage identification in warm forging

Artifacts in X-ray CT

Evaluating Gamma-H2AX Expression as a Biomarker of DNA Damage after X-ray in Angiography Patients

Objective: Coronary heart disease (CHD) is one of the most common diseases. Coronary angiography (CAG) is an important apparatus used to diagnose and treat this disease. Since angiography is performed through exposure to ionizing radiation, it can cause harmful effects induced by double-stranded breaks in DNA which is potentially life-threatening damage. The aim of the present study is to inves...

Direct Detection of Warm Dark Matter in the X-ray

We point out a serendipitous link between warm dark matter (WDM) models for structure formation on the one hand and the high sensitivity energy range (1-10 keV) for x-ray photon detection on the Chandra and XMM-Newton observatories on the other. This fortuitous match may provide either a direct detection of the dark matter or exclusion of many candidates. We estimate expected x-ray fluxes from ...

Iterative reconstruction methods in X-ray CT.

Iterative reconstruction (IR) methods have recently re-emerged in transmission x-ray computed tomography (CT). They were successfully used in the early years of CT, but given up when the amount of measured data increased because of the higher computational demands of IR compared to analytical methods. The availability of large computational capacities in normal workstations and the ongoing effo...

Observable Properties of X-ray Heated Winds in AGN: Warm Reflectors and Warm Absorbers

First discovered by spectropolarimetry, the warm reflecting gas near active galactic nuclei may be observed in many ways. When the nucleus itself is obscured, and instrumental angular resolution is fine enough to exclude radiation from the host galaxy, this gas can be seen in the soft X-ray band by a combination of bremsstrahlung, intrinsic line emission, and reflection of the nuclear continuum...