Table 3.

Evaluation of ionization chambers for DMLC QA measurements.

	Average (range) (cGy)		$\mathit{\text{Average}}\pm \mathit{2}\mathit{\text{SD}}(\mathit{\text{cGy}})$
Chamber	FSPB Algorithm	Measurement	${(D_{w,\mathit{\text{FSPB}}}/D_{w,\mathit{\text{meas}}})}_{\mathit{\text{DMLC}}}$
PinPoint	200.9 (101.7, 277.1)	211.5 (109.8, 302.5)	$0.944\pm 0.070$
IC10	200.5 (103.1, 277.1)	208.5 (108.7, 293.1)	$0.963\pm 0.048$
Farmer‐type	200.1 (105.0, 276.9)	207.3 (110.1, 287.2)	$0.973\pm 0.044$

The average dose calculation and measurement are presented in columns two and three. The average dose ratios $\pm 2\text{SD}$ are presented in column four.