1. ASTM E1441-93, Annual Book of ASTM Standards, Vol. 03.03 (1993).
2. For greater detail see Basetty P., “Improvements on Low Cost CT Systems”, Master’s Thesis, Iowa State University, (1997).
3. Wallingford, R. M. and J. N. Gray “Real-time X-ray Image Processing; Techniques for Sensitivity Improvement Using Low-cost Equipment” Review of Progress in QNDE, Vol. 14, p. 871 (1995).
4. Kini, V.R. and J.N. Gray, “Real Time X-ray Radiography and its use in Economic and Fast Tomographic Inspection”, Review of Progress in QNDE, Vol. 13, p. 541 (1995).
5. Kini, V. R., “Tomographic Inspection System Using X-rays”, M.S. Thesis, Iowa State University, (1994).