Table 3:

Comparative performance of drill systems in sclerotic lesions based on density^{^a}

Density (HU)	Diagnostic Yield	Crush Artifacts	Radiation Dose (mGy × cm²)	Scanning Time (min)
Manual
250–700	88.5 (23/26)	3.8 (1/26)	1044	45.1
>700	85.7 (12/14)	2.1 (3/14)	1317	46.1
P value	.583	.115	.3	.862
Battery-powered
250–700	89.3 (25/28)	0 (0/28)	889	34.6
>700	85 (17/20)	20 (4/20)	752	41
P value	.562	.025^{^b}	.38	.026^{^b}

↵a Percentage followed by number of cases/total number of cases in parentheses for diagnostic yield and crush artifacts. Mean values are listed for radiation dose and scanning time.
↵b Significant P value (P < .05).