TABLE 1

Comparison of Actual Cylinder Volumes and Cylinder VOIs

Cylinder	Actual volume (cm³)	Average measured VOI (cm³)	SD	P^*
1	18.7	16.2	1.20	0.212
2	7.6	7.9	0.08	0.126
3	4.3	5.3	0.37	0.164
4	1.9	1.9	0.01	0.205

↵* t test analysis between actual and average volume values.