Table 2.
Dosimetric parameters of 125I seed implantation using the "Ten‐step method” at 1 month and calculated BED in 27 cases with prostate volumes over 40 cm3 is shown
| Number of seed LDR monotherapy | n = 27 | |
|---|---|---|
| Variables | Mean (range) at seed implantation | Mean (range) at one month after seed implanation |
| Prostate D90 (Gy) | 194.5 (173.0–199.0) | 192.9 (167.4–223.8) |
| BED (Gy) | 207.7 (183.5–213.1) | 205.9 (177.2–241.4) |
| V100 (%) | 99.7 (98.1–100) | 99.3 (97.1–100) |
| UD30 (Gy) | 197.6 (175.1–212.8) | 205.8 (155.7–259.2) |
| R100 (cc) | 0.321 (0–1.07) | 0.68 (0–2.03) |
Average prostate volume (range) of 27 cases is 46.6 (40‐77.0) cm3. D90: minimal dose (Gy) received by 90% of the prostate. BED: biologically effective dose. V100: The percentage prostate volume receiving 100% of the prescribed minimal peripheral dose; UD30: Minimal dose (Gy) received by 30% of the urethra; R100: Rectal volume (cm3) receiving 100% of the prescribed dose.