Table 2.

ADC Value Comparison in Normal Breast Tissue, Benign and Malignant Masses by Two ROI Methods

	Method	Number	Mean ± SD (× 10-3 mm2/s)	P value
The normal breast tissue	Average of 2 large ROIs	98	1.79±0.26	<0.001
Benign	In the whole mass	48	1. 49±0.29	<0.001
	In the most restricted part	48	1.36±0.30
Malignant	In the whole mass	50	1.23± 0.26	<0.001
	In the most restricted part	50	1.06±0.26