Critical Comments about the German and French Uses of I.Q.I.S for Monitoring Radiographic Sensitivity

摘要

This paper presents a comparative study between several types of Image-Quality-Indicators, (I.Q.I.) to monitoring the industrial radiographic image. The study was made to different inclinations of the X-ray beam on the specimen under inspection. We used I.Q.I A.F.N.O.R - step-drilled hole type and DIN-wire penetrameters. According to Halmshaw for a steel plate 38 mm of thickness the value of sensitivity is S = 0.7% using steel D.I.N-wire penetrameter and, S = 0.2% using I.Q.I A.F.N.O.R. In this case, I.Q.I A.F.N.O.R is more sensitive than D.I.N-wire penetrameter. In our case, an experiment was designed to compare the use of the I.Q.I D.I.N and A.F.N.O.R for angles of incidence of the X-ray beam on the specimen under inspection. The experimental values obtained allow us to conclude that the radiographic image quality, also depends on the inclination of the incident X-ray beam on the I.Q.I. In addition, D.I.N-wire penetrameter offers bigger sensitivity than the I.Q.I A.F.N.O.R for this case.