In recent years, x-ray radiography has been used to probe the internal structure of dense sprays. Quantitative measurements of spray mass distribution have been obtained on microsecond time scales and with spatial resolution of 15 μm even in high-pressure environments. These data have been difficult or impossible to obtain with conventional optical diagnostics. A limitation to these measurement...

There is a growing need to rapidly scan bulk air cargo for contraband such as illicit drugs and explosives. Ideally, cargo containers must be imaged without unpacking and with scan times of less than one minute. Fast neutron techniques are particularly attractive for screening cargo as they can be used to determine cargo composition. The Commonwealth Science and Industrial Research Organisation...

We examine non-destructive testing (NDT) techniques that characterize the interlayer bond quality of idealized 3-D printed concrete, simulating a layup bond, in-situ. An experimental study evaluates four NDT methods (x-ray radiography, ultrasonic pulse velocity (UPV), vibration resonance, and multi-element array ultrasonics) to idealized, layered concrete specimens simulate layers structure. Th...

The collective effective dose to the population from all x-ray examinations in Finland in 2005 was estimated. The numbers of x-ray examinations were collected by a questionnaire to the health care units (response rate 100 %). The effective doses in plain radiography were calculated using a Monte Carlo based program (PCXMC), as average values for selected health care units. For computed tomograp...

Recently, very thin single crystal scintillator imaging plates became of great interest. Such thin screens are mainly used in micro-CT and nano-CT systems with either micro-focus X-ray tubes or with synchrotron sources. This work deals with a high resolution CCD camera in conjunction with a macro optical system and YAG:Ce single crystal scintillators for low energy X-ray micro-radiography appli...

Background and Objective: Chest X-ray is usually the first radiography performed for a newborn. This test is easily accessible and yet a basic screening method. Different results have been reported in various studies regarding the diagnostic value of chest X-ray in cardiovascular disease in children. Materials and Methods: The study was carried out retrospectively using the medical files of 100...