Fig. 5.
Changes in the Q H,10mm to N 10mm ratio (QNR) as a function of the number of iterations for different Gaussian filters. Of the first to fifth iterations, and 3, 6, and 9 mm FWHM values for the Gaussian filters were used. The maximum QNR (2.82) was found at 3 iterations and for the 6-mm Gaussian filter FWHM