Table 2.

Summary of K^trans and V_e measured in different patient subgroups. Among all lesions, the K^trans in inflammation was significantly higher than those in malignant lesions (P=0.020). V_e was also higher in inflammation compared to malignant lesions without statistical significance (P=0.177). The K^trans in malignant lesions was significantly higher than those in benign lesions (pneumoconiosis and tuberculoma) (P=0.001). The V_e was higher in malignant lesions compared to benign lesions without statistical significance (P=0.063).

(−): standard deviation not applicable.

Group	No. of patients (%)	Mean Ktrans	Mean Ve
Malignant lesions	17 (73.9)	0.37±0.22	0.26±0.12
Adenocarcinoma	10 (43.5)	0.41±0.28	0.29±0.14
Squamous cell carcinoma	5 (21.7)	0.33±0.07	0.24±0.06
Small cell lung cancer	1 (4.3)	0.24(−)	0.18(−)
Non-small cell carcinoma	1 (4.3)	0.30(−)	0.16(−)
Benign lesions	2 (8.7)	0.07±0.01	0.10±0.00
Pneumoconiosis	1 (4.3)	0.07(−)	0.10(−)
Tuberculoma	1 (4.3)	0.06(−)	0.10(−)
Inflammation	4 (17.4)	0.78±0.52	0.36±0.16