Table 2.

Typical measured values of ESDs at different phantoms, values obtained from the mathematical model and typical α, β, and backscatter factors values

Examination	Phantom	ESD measured (mGy)	ESD mathematical model (mGy)	α(x1000)	β	BSF
AP abdomen	ALD	3.00	2.29	9.849	1.988	1.35
PA chest	CHE	0.20	0.25	2.580	2.016	1.47
AP chest	CHE	0.36	0.32	6.893	2.016	1.35
LAT chest	CHE	0.88	0.80	3.404	2.016	1.47
AP lumbar spine	ALD	2.98	3.29	10.478	2.042	1.32
LAT lumbar spine	ALD	7.41	8.11	10.241	2.040	1.35
LAT lumbo‐sacral joint	ALD	8.30	7.42	12.256	2.062	1.35
AP pelvis	ALD	2.66	2.84	9.627	2.084	1.32
PA skull	SKU	1.91	1.73	9.204	2.006	1.29
LAT skull	SKU	1.45	1.52	9.002	2.006	1.29
AP urinary tract	ALD	2.50	2.79	10.066	2.006	1.35