Intravoxel incoherent motion diffusion-weighted imaging for monitoring chemotherapeutic efficacy in gastric cancer

Table 2 Correlation between apparent diffusion coefficient and intravoxel incoherent motion parameters, microvessel density, cellular apoptosis and necrosis fraction of tumors (n = 25)

	NF (%)		MVD (vessels/HPF)		Apoptosis (%)
	rs	P value	rs	P value	rs	P value
ADC (× 10-3 mm2/s)	0.720	< 0.001	-0.395	0.051	0.626	0.001
IVIM parameters
D (× 10-3 mm2/s)	0.522	0.007	-0.201	0.335	0.542	0.005
f (%)	-0.347	0.089	0.618	0.001	-0.550	0.004
D* (× mm2/s)	-0.378	0.062	0.538	0.006	-0.692	< 0.001

P < 0.05 is considered to be statistically significant. ADC: Apparent diffusion coefficient; IVIM: Intravoxel incoherent motion; MVD: Microvessel density; NF: Necrosis fraction.