Table 2.

Random and systematic errors coming from the practical evaluation of radiation

Source	One standard deviation ${\mathrm{\Delta }}_i$
Measurement:
TLD counting statistics	3% $\sim$ 10%
Others:
$W_T$ (weighting factor)	5%
VMAT output photon dose	2%
TLD-100H calibration	3% $\sim$ 20%
Inserting positions of phantom organ or tissue	5%
Density effects of PMMA phantom	1.5% $\sim$ 3.8%
Variation of Harshaw 3500 reader	3% $\sim$ 8%
${\mathrm{\Delta }}_{tot}$	9.00% $\sim$ 21.0%