Table 4. Manual measurements of maximum diameter and the CT value of large nodules.

Parameters	Number	Maximum diameter (mm)	CT value (HU)
A120kV-3	18	12.13±1.56	13.89±9.78
B80kV-3	–	12.08±1.56	25.64±12.67
T value	–	1.017	−2.689
P value	–	0.323	0.016 (P<0.05)

The results show that there is no significant difference in maximum diameter between two voltage groups. However, there is significant difference between two voltage groups in their respective CT value. These results are consistent with those of measurements performed with CAD. CAD, computer-aided diagnosis.