Evaluating the efficacy of interventional hepatocellular carcinoma via dynamic contrast-enhanced magnetic resonance imaging: A retrospective study

Table 1 Comparison of liver magnetic resonance imaging measurement parameters before and after liver cancer intervention in 120 patients, mean ± SD

Time	Apparent diffusion coefficient value (× 10-3 mm2/second)	Transport constant (minute-1)	Rate constant (minute-1)	Volume fraction	Tumor volume (cm3)
Preoperative intervention	0.89 ± 0.13	0.36 ± 0.10	0.62 ± 0.15	0.57 ± 0.16	21.03 ± 3.42
After intervention surgery	1.23 ± 0.14	0.18 ± 0.07	0.31 ± 0.06	0.40 ± 0.05	10.67 ± 2.48
t value	10.970	9.090	11.829	6.252	26.863
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001

Table 2 Comparison of differences in liver magnetic resonance imaging parameters among patients with different efficacy groups of liver cancer interventional therapy, mean ± SD

Group	Number of cases	Apparent diffusion coefficient difference (× 10-3 mm2/second)	Transport constant difference (minute-1)	Rate constant difference (minute-1)	Volume fraction difference	Tumor volume difference (cm3)
Effective group	71	0.34 ± 0.08	0.24 ± 0.06	0.47 ± 0.12	0.46 ± 0.13	10.57 ± 2.34
Ineffective group	49	0.14 ± 0.03	0.13 ± 0.02	0.18 ± 0.04	0.19 ± 0.05	2.86 ± 0.45
t value		17.525	12.355	16.285	13.835	22.747
P value		< 0.001	< 0.001	< 0.001	< 0.001	< 0.001

Table 3 Correlation analysis between the difference in parameters apparent diffusion coefficient, transport constant, rate constant, volume fraction and tumor volume difference of liver dynamic contrast-enhanced magnetic resonance imaging combined with diffusion-weighted imaging in 120 patients with liver cancer after interventional therapy

Index	Tumor volume difference
	R value	P value
Apparent diffusion coefficient difference	0.474	< 0.001
Transport constant difference	0.495	< 0.001
Rate constant difference	0.375	< 0.001
Volume fraction difference	0.365	< 0.001

Table 4 The value of predicting the postoperative efficacy of liver cancer intervention using the difference between liver dynamic contrast-enhanced magnetic resonance imaging parameters apparent diffusion coefficient and transport constant in 120 patients before and after liver cancer intervention

Index	Cutoff	Area under the receiver operating characteristic curve	95%CI	Youden index	Sensitivity (%)	Specificity (%)	P value
Apparent diffusion coefficient difference	> 0.380 × 10-3 mm2/second	0.953	0.898-0.983	0.835	91.84	91.55	< 0.001
Transport constant difference	> 0.250 minute-1	0.933	0.872-0.970	0.785	89.80	88.73	< 0.001