Table 1.

Voltages used in examinations of the sinuses

Type of examination	Age group	Voltage (kV)
		Hospital A				Hospital B
		Min	Mean	Max		Min	Mean	Max
Lateral	0–1 year	—	—	—		70	70	70
	1–5 years	61	68.82	72		70	71.1	73
	5–10 years	60	69.44	74		66	71.71	77
	10–15 years	69	74.08	91		70	71.8	73
Occipitofrontal	0–1 year	—	—	—		—	—	—
	1–5 years	55	58.33	60		70	75.33	81
	5–10 years	60	60.33	62		70	73.5	77
	10–15 years	60	60.57	63		—	—	—
Occipitomenta	0–1 year	—	—	—		—	—	—
	1–5 years	63	65.33	68		73	76.11	77
	5–10 years	63	64.66	65		70	73.33	77
	10–15 years	65	65.28	66		—	—	—

Min, minimum; Max, maximum.