Rajashekar Venkatachalam

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Computed Radiography (CR) is gaining importance in industries for inspection of welds and castings using x-rays. CR is preferred because of lesser exposure time, no chemical processing, lesser cost of consumables and advantage of a digital image output. It also allows archiving of digital images over many years, which is mandatory as per standards. Hence,(More)
Suitability of computed radiography with Ir-192, Co-60 and up to 9 MEV x-rays for weld inspections is of importance to many heavy engineering and aerospace industries. CR is preferred because of lesser exposure and processing time as compared to film based radiography and also digital images offers other advantages such as image enhancements, quantitative(More)
This paper reports the performance characteristics of a-Si detectors with Ir-192 gamma source. Imaging performance of the detector system is evaluated using contrast sensitivity over a range of material thickness of steel, signal to noise ratio, dynamic range and linearity. The radiographic sensitivity was observed over a range of thickness of steel using(More)
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