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Table 1 Clonogenic Assay: Surviving Fraction (SF) of irradiated cells (n = 3 for each experiment); n.d. = not determined

From: Determination of cell survival after irradiation via clonogenic assay versus multiple MTT Assay - A comparative study

  plating after irradiation plating before irradiation
A 549 250 cells 500 cells mean value S.D. 50 cells 100 cells mean value S.D.
0 Gy 100.0% 100.0% 100.0%   100.0% 100.0% 100.0%  
1 Gy 67.9% 66.3% 67.1% 1.1% 97.7% 87.2% 92.5% 7.4%
2 Gy 62.3% 60.8% 61.6% 1.0% 90.7% 75.8% 83.3% 10.5%
4 Gy 22.6% 24.7% 23.7% 1.5% 55.8% 34.6% 45.2% 15.0%
6 Gy n.d. 25.6% 19.0% 22.3% 4.7%
8 Gy 5.0% 4.1% 4.6% 0.6% 16.3% 10.4% 13.4% 4.1%
15 Gy 3.4% 0.0% 1.7% 2.4% 2.3% 1.9% 2.1% 0.3%
LN 229 250 cells 500 cells Mean value S.D. 100 cells 200 cells Mean value S.D.
0 Gy 100.0% 100.0% 100.0%   100.0% 100.0% 100.0%  
1 Gy 90.5% 90.2% 88.9% 3.1% 109.0% 89.5% 99.5% 16.7%
2 Gy 77.0% 60.3% 67.7% 2.2% 38.8% 45.0% 41.9% 12.7%
4 Gy 20.3% 21.1% 20.6% 0.7% 12.9% 14.1% 13.5% 2.4%
6 Gy n.d. 1.6% 3.7% 2.6% 1.7%
8 Gy 1.7% 1.7% 1.7% 0.1% 0.0% 0.0% 0.0% 0.0%
15 Gy 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
F 98      75 cells 100 cells Mean value S.D.
0 Gy n.d. 100.0% 100.0% 100.0%  
1 Gy      74.1% 57.4% 65.8% 15.4%
4 Gy      33.3% 41.0% 37.2% 7.7%
6 Gy      33.3% 28.7% 31.0% 8.8%