Table 5.

Basic pre‐ and post‐implant dosimetric parameters for the brachytherapy‐seed‐implant‐alone study group—prescription dose = 144 Gy

Dosimetric parameter	Pre‐implant $\mathit{(}n=15\mathit{)}$	Post‐implant $\mathit{(}n=15\mathit{)}$	p Value
Prostate volume (cm3)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$33.3\pm 9.7$	$38.2\pm 15.0$	0.28
Median	31.7	38.7
Range	$20.3\sim 52.2$	$18.0\sim 62.8$
$D_{90}$ (Gy)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$189.8\pm 9.4$	$146.9\pm 15.3$	$<0.001$
Median	191.9	145.0
Range	$174.4\sim 205.1$	$125.0\sim 170.1$
$D_{100}$ (Gy)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$132.1\pm 11.8$	$109.2\pm 14.5$	$<0.001$
Median	133.1	109.0
Range	$113.0\sim 159.7$	$85.0\sim 136.8$
$V_{100}$ ($\mathrm{\%}$ prostate volume)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$99.7\pm 0.4$	$92.8\pm 4.7$	$<0.001$
Median	99.7	93.0
Range	$99.4\sim 100.0$	$82.0\sim 98.0$
Maximum urethral dose (Gy)
$\mathrm{M}\mathrm{e}\mathrm{a}\mathrm{n}\pm \mathrm{S}\mathrm{D}$	$243.8\pm 24.0$	$224.8\pm 38.5$	0.11
Median	248.5	219.0
Range	$172.3\sim 279.3$	$158.9\sim 298.2$

SD = standard deviation; $D_{90}=$ dose covering $90\mathrm{\%}$ volume; $D_{100}=$ dose covering $100\mathrm{\%}$ volume; $V_{100}=$ volume receiving $100\mathrm{\%}$ of the prescribed dose.