1. R.S. MacKay:Medical Images and Displays: Comparisons of Nuclear Magnetic Resonance, Ultra-Sound, X-Rays and Other Modalities (Wiley, New York 1984)
2. W.C. Röntgen: Sitzungsber. Physikal.-Medizin. Ges.132 (Würzburg 1895) [English transl. Nature53, 274 (1896)]
3. T.S. Curry III, J.E. Dowdey, R.C. Murry Jr:Christensen's Physics of Diagnostic Radiology, 4th edn. (Lea & Febiger, Philadelphia 1990)
4. K. Herrlin, G. Svahn, C. Olsson, H. Pettersson, C. Tillman, A. Persson, C-G. Wahlström, S. Svanberg: Radiology189, 65 (1993)
5. M. Swift, D. Morrell, R.B. Massey, C.L. Chase: New Engl. J. Med.325, 1831 (1991)