Evaluation of radioactive 125I seed implantation for the treatment of refractory malignant tumours based on a CT-guided 3D template-assisted technique: efficacy and safety

Table 2 Comparison of dosimetric parameters of panned target volume (CTV) before and after seed implantation of 25 patients with refractory malignant tumor

Parameters	Before surgery			After surgery			P
Parameters	Interval	Median	Interval	Median	Interval	Median	P
D90	114–181	148	145.32 ± 23.48	105–180	128	142.16 ± 22.25	0.39
V100	76.6–100	96.3	94.63 ± 5.76	73.7–100	95	93.47 ± 6.29	0.33
V150	46.2–90.4	64.5	67.35 ± 14.07	46.7–89.6	66.1	66.72 ± 12.11	0.23
CI	0.4–0.8	0.66	0.63 ± 0.11	0.42–0.82	0.61	0.63 ± 0.11	0.42
EI	0.18–1.1	0.42	0.46 ± 0.27	0.21–1.3	0.46	0.50 ± 0.29	0.38
HI	0.09–0.61	0.31	0.31 ± 0.13	0.1–0.59	0.34	0.31–0.12	0.40

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