Egyptian Journal of Radiology and Nuclear Medicine

Table 5 Comparison between benign and malignant tumors regarding signal homogeneity or heterogeneity, DWI, ADC map, and ADC value

From: Role of diffusion-weighted MRI in characterization of mediastinal masses

		Benign		Malignant		Test value^a	P value	Sig.
		No.	%	No.	%	Test value^a	P value	Sig.
Lesion	Heterogeneous	8	80	33	97.1	3.539	0.060	NS
Lesion	Homogeneous	2	20	1	2.9	3.539	0.060	NS
DWI	Facilitated	10	100	2	5.9	34.510	0.000	HS
DWI	Restricted	0	0	32	94.1	34.510	0.000	HS
ADC map	Low signal	2	20	33	97.1	33.263	0.000	HS
	High signal	0	0	1	2.9
	Mixed signal	8	80	0	0.0
ADC value × (10⁻³ mm²/s)	Mean ± SD	1.39 ± 0.26		0.86 ± 0.35		−4.360^b	0.000	HS

NS non-significant, HS highly significant
^aChi-square test
^bIndependent t test

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