Title of article
Performance evaluation of a gamma-ray imaging system for nondestructive testing of welded pipes
Author/Authors
Cho، نويسنده , , H.S. and Oh، نويسنده , , J.E. and Choi، نويسنده , , S.I. and Cho، نويسنده , , H.M. and Park، نويسنده , , Y.O. and Hong، نويسنده , , D.K. and Lee، نويسنده , , M.S. and Yang، نويسنده , , Y.J. and Je، نويسنده , , U.K. and Kim، نويسنده , , D.S. and Woo، نويسنده , , T.H. and Lee، نويسنده , , B.S. and Lee، نويسنده , , H.K.، نويسنده ,
Pages
4
From page
650
To page
653
Abstract
As a continuation of our radiographic testing (RT) R&D, we have developed a gamma-ray imaging system to be suitable for nondestructive testing of welded pipes. The system consists of an imaging detector having a CdTe/CMOS-based pixel array (AJAT, SCAN1000), a collimated 75Se gamma source having about 78.7 Ci activities, a gear track mounted around test pipes for image scan, and a computer-controlled microstep motor for precise control of the scan speed. All the components of the imaging system were assembled tightly by a chain belt. From the imaging system, we obtained useful gamma images of a stainless steel pipe (30 cm in internal diameter and 1 cm in thickness) having a weld line. Using standard techniques for evaluation of the radiography quality, we assessed the imaging characteristics of the detector in terms of the modulation transfer function (MTF), the noise power spectrum (NPS), and the detective quantum efficiency (DQE).
Keywords
Gamma-ray imaging system , Nondestructive Testing , Welded pipes , image quality
Journal title
Astroparticle Physics
Record number
2017723
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