Three Dimensional Modeling of Projection Radiography

Computer Simulation of Radiographic Process — A Study of Complex Component and Defect Geometry

“…using Monte Carlo methods [1, 2]). The most easy approximation is to neglect the sources of characteristic radiation inside the object and the scattering processes [3,4]. Then the transport equation (1) becomes a homogeneous differential equation.…”

Application of Two-Dimensional Matched Filters to X-Ray Radiographic Flaw Detection and Enhancement

“…Matched filtering is ideally suited for application to radiographie nondestructive testing because of the recent availability of radiographic inspection models [8] in which apriori information from a CAD model of the pan can be incorporated into the filter. In addition, the expected overall flaw morphology is often known ahead of time.…”

“…Figures 1-3 show the original flat-plate images with their corresponding results after matched filtering. The original images were generated using the x-ray simulation model of Gray et al [9] and have flaw signal-to-noise ratios of 4.1 dB, -4.4 dB and -10 dB, respectively. The signal-to-noise ratios of the filtered images are 30 dB, 20 dB and 19 dB, respectively.…”

Computer modeling of neutron radiography

“…The modeled ultrasonic testing components included the waves radiated by the probes (for the pitch-catch technique), wave modification by sample geometry, defect effects on wave scattering and propagation, and the effects of signal processing and display. Similar models have been developed for eddy current examination by Auld et al [6) and for x-ray radiography by Gray [7).…”

“…Important modifications yet to be completed include the inclusion of the ability to handle flaws and nonhomogeneous materials. It should be pointed out that X-ray scattering can also be treated by the methods developed in this code [7].…”