Table 3.

Seed implant planning parameters for the two study groups

	Groups (each $\mathrm{n}=15$ )
Parameter	$IMRT+$ seed implant	Seed implant alone	p Value
Needles $(n)$
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$15.2\pm 2.0$	$18.4\pm 3.2$	0.0012
Median	16	18
Range	$14\sim 18$	$14\sim 25$
Seeds (n)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$45.1\pm 8.2$	$51.6\pm 9.5$	0.043
Median	43	52
Range	$31\sim 64$	$44\sim 74$
Seeds/needle
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$3.4\pm 0.8$	$2.8\pm 0.4$	0.33
Median	2.8	2.9
Range	$2.1\sim 5.5$	$2.1\sim 3.4$
Activity/volume (mCi)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$0.60\pm 0.08$	$0.86\pm 0.15$	$<0.001$
Median	0.56	0.85
Range	$0.53\sim 0.79$	$0.47\sim 1.11$
Total activity/case (mCi)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$20.93\pm 3.75$	$27.49\pm 5.5$	$<0.001$
Median	20.45	26.88
Range	$15.62\sim 29.73$	$20.39\sim 40.79$

$\text{IMRT}=$ intensity‐modulated radiation therapy; $\text{SD}=$ standard deviation.