Fiber Orientation Observation by X-ray CT and Simulation

Observation and theory of X-ray mirages

The advent of X-ray lasers allowed the realization of compact coherent soft X-ray sources, thus opening the way to a wide range of applications. Here we report the observation of unexpected concentric rings in the far-field beam profile at the output of a two-stage plasma-based X-ray laser, which can be considered as the first manifestation of a mirage phenomenon in X-rays. We have developed a ...

Organ and effective dose arising from conventional diagnostic X-ray examinations by Monte Carlo simulation (MCNP-4C Code)

 ABSTRACTBackground: Monte Carlo simulation has been used by many researchers to calculate organ and effective dose of patients arising from conventional X-ray examinations. In this study the radiation transport code, MCNP-4C, has been used to perform Monte Carlo simulations to estimate radiation dose delivered to different organs in conventional X-ray examinations.Material and Methods: In this...

simulation and comparison of radiology x-ray spectra

monte carlo method is a very accurate method to optimize medical diagnostic radiology spectra and simulation of radiation transportation. using mcnp code, radiology and mammography attenuated x-rayspectraweresimulated.the ipem report number 78 was used as a reference to compare with the geant4 and mcnp simulations because of its popularity and wide availability. the results of geant4 in 40kev s...

Observation of X-ray transient XTE J1748−288 by the Indian X-ray astronomy experiment

The observations of a newly discovered X-ray transient source XTE J1748−288 were made in the energy band 2 − 18 keV with the Indian X-ray Astronomy Experiment(IXAE) on the IRS−P3 satellite during 1998, June 14−25. The source count rate declined gradually with an exponential decay time of 19 ± 1.6 days. The X-ray light curves showed no significant intensity variations on short time scales (≤ 10s...

Artifacts in X-ray CT