Table 4.

Comparison with exposure limits.

Anatomic region	Exam	Texas ESE limits		Modern dimensions		Calculated vs limit(%)
				Patient thickness	ESE limit		Patient thickness	Calculated ESE
				(cm)	(mR)		(cm)	(mR)
Chest	PA	23	30	27.1	25	−17
Abdomen	KUB	23	450	22.4	261	−42
Lumbo-sacral spine	AP	23	550	22.4	261	−53
Cervical spine	AP	13	120	12.3	52	−57
Thoracic spine	AP	23	325	27.1	103	−68
Full spine	AP	23	300	27.1	196	−35
Skull	Lat	15	150	15	87	−42
Foot	AP	8	50	7.5	6	−88