Table 1. Correlation coefficients of microvascular density of different vessel sizes (in rows) and sets of radiomic features selected for sparse canonical correlation analysis (in column).

Microvessel density	PET/MRI		DCE alone		MRI alone (DCE + Dixon)		PET alone
	Pearson correlation	Spearman Correlation	Pearson correlation	Spearman Correlation	Pearson correlation	Spearman Correlation	Pearson correlation	Spearman Correlation
Whole	0.639257121	0.466324373	0.538858721	0.340984597	0.531014484	0.347780127	0.43974722	0.440652371
small	0.634724358	0.375415282	0.542388517	0.365297493	0.532341511	0.366807611	0.42893314	0.367411658
middle	0.626200618	0.512836001	0.501232994	0.306704923	0.492377955	0.315010571	0.441627902	0.455451525
large	0.608610984	0.655693144	0.452889697	0.255964965	0.527560997	0.327393537	0.282646961	0.298701299
p value (Z-stat)	0.044		0.048		0.084		0.26