Correlation Analysis between Retention of Gd-DTPA in the Cystic Area of Brain Metastasis and MRI Signs

Table 2

Comparison of CSI values in the cystic area and edema area in patients with BM.

	Median	Interquartile range	χ^2	P
Cystic area			9.577	0.008
Plain scan	0.477	0.357
Enhanced scan	0.349	0.535
Enhanced plain scan	0.664	0.228
Edema area			28.309	<0.001
Plain scan	0.809	0.250
Enhanced scan	0.857	0.231
Enhanced plain scan	0.899	0.209

Note. The multiple Friedman M test showed differences in the CSI values of cystic lesions and edema areas among the three scans. Pairwise comparison of Friedman M tests was performed: (1) cystic lesions: no significant difference was observed between the plain scan and enhanced scan (), a significant difference was noted between the plain scan and enhanced plain scan (), and a significant difference was observed between the enhanced scan and enhanced plain scan (); (2) edema area: no significant difference was observed between the plain scan and enhanced scan (), a significant difference was noted between the plain scan and enhanced plain scan (), and a significant difference was observed between the enhanced scan and enhanced plain scan ().