1. Benedetto, A.R., Nusynowitz, M.L.: An improved FORTRAN program for calculating modulation transfer functions. J. Nucl. Med. 18, 85?86 (1977)
2. Nusynowitz, M.L., Benedetto, A.R.: Simplified method for determining the modulation transfer function for the scintillation camera. J. Nucl. Med. 16, 1200?1203 (1975)
3. V�yrynen, T.: Measurement of the graphic properties of Roentgenographic apparatuses. Acta Polytech. Scand. 108, 1?45 (1975)