TABLE 2

Simulated Parallel Beam Effective and Total Resolutions at Different z Values

 Source–collimator surface distance (cm) Resolution (cm) z = 10 z = 15 Effective 0.6119 0.8314 Total 0.7256 0.9183
• Effective hole length = 3.189 cm; for lead at 140 keV and B = 0.75 cm.