The skin dose of pelvic radiographs since 1896

Insights into Imaging

Table 8 Uncertainty estimate for a case with information on primary and secondary circuit

Beck (1904) [64]	ε	α	I_prim	V_prim	t_exposure	Wall	FSD	KfiA	Total
Beck (1904) [64]	ε	α	A	V	s	mm	cm	mGy	uncert.
Parameter value	0.69	0.17	1.5	115	210	0.85	23	320
Uncertainty assum.	0.14	0.07	0.30^a	25^b	21	0.15	3		63%

^aCurrent was specified as 1 to 2 A
^bVoltage specified as 110-120 V, but as loss over series resistance (rheostat) cannot be excluded we raised the uncertainty