Table 1.

Physical phantoms: volume calculation results.

Phantom	V M	$\overline{V^{\prime }}$	σ V′	Mean error	σ e
no.	(cm3)	(cm3)		(%)
1	88	89.2	1.3	1.7	0.8
2	101	103.4	1.1	2.4	1.1
3	102	104.4	0.8	2.3	0.8
4	112	115.1	0.8	2.7	0.7
5	132	135.1	0.4	2.3	0.3
	Overall			2.3	0.8