PERFORMANCE OF A STORAGE PHOSPHOR IMAGING PLATE FOR INDUSTRIAL X- RAY RADIOGRAPHY APPLICATION
Mohammad Yousuf*, K. Govinda Rajan*, Baldev Raj*, P. V. Thomas**, M. Palaniappan**, B. K. Godwal*** and S. Meenakshi*** *Metallurgy and Materials Group, IGCAR, Kalpakkam **Quality Assurance Division, IGCAR, Kalpakkam ***High Pressure Physics Division, BARC, Mumbai
Keywords: Radiography, Defect detection, Imaging plate, X-ray Film, Medical Imaging
ABSTRACT
An Imaging Plate (I. P. ) utilising a storage phosphor is now finding increasing use in X-ray diffraction, auto-radiography and also in medical imaging. The aim of the present investigation is to evaluate the suitability of an I. P. for industrial X-ray radiography. Accordingly, a few specimens with known features of the internal defects were selected and a comprehensive study of imaging pattern obtained on the I. P. and on the film exposed with X-ray radiography was performed. Commercial phosphor imaging plates measuring 250 mm x 200 mm were used in this study. The principal findings are:
it is possible to obtain better sensitivity with the IP than with an X-ray film,
an IP is faster than the X-ray film as was evident from the much reduced exposure time ( ~1/10th) than was necessary for the X-ray film,
the digital signal processing features available with the IP reader make it possible to achieve, much higher signal to noise ratio and hence the contrast.
In this paper the salient aspects of applicability of the IP vis-a-vis X-ray film will be discussed.
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.full paper not received Publisher:Ashgate Publishing Company
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