Table 3.

Warning and Action thresholds for planar radiographic modes based on run chart analysis

	kV			MV
	Warning	Action		Warning	Action
${\mathrm{f}}_{30}$ a	2%	4%	${\mathrm{f}}_{30}$	2%	4%
${\mathrm{f}}_{40}$ a	1%	3%	${\mathrm{f}}_{40}$	1%	3%
${\mathrm{f}}_{50}$ a	1%	3%	${\mathrm{f}}_{50}$	1%	3%
Dose (μGy)	1%	2%	Dose (μGy)	1%	2%
Energy (kV)	1%	2%

^a ${\mathrm{f}}_{\mathrm{x}}$ parameters measured in units of (lp/mm); sample size of 60 measurements taken over four‐month time period.