Opportunities of X-ray testing without intermediate data carriers of information
Abstract
The new direction of radiography is Flash-radiography (FR ) which doesn’t have intermediate data carriers (films and storage plates). FR produces a quick image. It provides low testing cost, and capability of multi-angle real time internal defects monitoring of the objects.
In film radiography, if relative photometric density is more than 4, then the snapshots become virtually unreadable and they can be difficult to be digitized. Current film-free technologies do not have this disadvantage and, besides, give results in a digital form without special digitizing systems.
Digital data contain radiation images of internal defects, expand the flaw-detection possibilities and reduce testing cost. Flash-radiography is based on portable X-ray television, which allows the observation of X-ray testing results on a monitor screen. The internal defects examination from different angles may be carried out.
Flash-radiography with digital solid-state transducers is the most perspective one with sensitivity up to 0.1% of examined metal’s thickness at resolution exceeding 10 pairs of lines per mm. Application of small-size movable solid-state transducers opens new technological capabilities. They can be located and moved in the zones where positioning of film holders and storage plates is impossible. The new X-ray mini technology expands the application of NDT. The examples of practical application of solid-state miniature transducers are presented.
In film radiography, if relative photometric density is more than 4, then the snapshots become virtually unreadable and they can be difficult to be digitized. Current film-free technologies do not have this disadvantage and, besides, give results in a digital form without special digitizing systems.
Digital data contain radiation images of internal defects, expand the flaw-detection possibilities and reduce testing cost. Flash-radiography is based on portable X-ray television, which allows the observation of X-ray testing results on a monitor screen. The internal defects examination from different angles may be carried out.
Flash-radiography with digital solid-state transducers is the most perspective one with sensitivity up to 0.1% of examined metal’s thickness at resolution exceeding 10 pairs of lines per mm. Application of small-size movable solid-state transducers opens new technological capabilities. They can be located and moved in the zones where positioning of film holders and storage plates is impossible. The new X-ray mini technology expands the application of NDT. The examples of practical application of solid-state miniature transducers are presented.
