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Table 1 Absolute values (counts per minute ✕ 1000) measured in a Geiger-Müller detector for the radiopharmaceutical 18F-FDG, with lead and polymer shields

From: Radioprotective efficacy of plastic polymer against the toxicogenomic effects of radiopharmaceutical 18F-FDG on human lymphocytes

18F-FDG Distance Unshielded Lead Polymer Polymer + Lead Lead + Polymer
A =
4.90
mCi
5 cm sat sat sat sat sat
10 cm sat sat sat sat sat
20 cm 225 229,9 185 226,8 171,9
60 cm 30 34,8 27,4 31,8 24,7
A =
2.60
mCi
5 cm sat sat sat sat sat
10 cm sat sat 266 sat 252
20 cm 134 142 106,2 134 96,8
60 cm 26,8 28,4 21,2 27 20,8
A =
0.68
mCi
5 cm 163 176 130,2 172,4 121,3
10 cm 89 90,4 73,3 86 65,1
20 cm 34 38 25,3 35 22,6
60 cm 4 3,8 3,8 3,8 3,5
  1. A: radioactive activity of the element. Sat: saturation of the monitor, making measurement impossible