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Table 2 Dosimetric features for high-dose-rate brachytherapy (a) and cyberknife (b)

From: Salvage prostate re-irradiation using high-dose-rate brachytherapy or focal stereotactic body radiotherapy for local recurrence after definitive radiation therapy

a
Parameter Value
CTV 35 (25–43)
D90 106 (106–108)
D100 81 (77–85)
V100 97 (96–98)
V150 24 (22–32)
V200 8 (7–10)
D2 rectum 57 (50–69)
D2 urethra 81 (76–85)
DHI 0.27 (0.22–0.33)
b
Region of interest Mean (cGy) Min (cGy) Max (cGy)
GTV 4027 3462 4375
PTV 3936 3134 4375
Bladder 862 161 3680
Rectum 727 102 3561
Right femoral head 371 145 894
Left femoral head 428 139 1075
  1. Note: CTV clinical target volume, D90 dose delivered to 90% of the CTV, D100 dose delivered to 100% of the CTV, V100 volume receiving 100% of the prescribed dose, V150 volume receiving 150% of the prescribed dose, V200 volume receiving 200% of the prescribed dose, D2 rectum dose delivered to 2% of the rectum volume, D2 urethra dose delivered to 2% of the urethra volume, DHI dose non-homogeneity Index: V150/V100
  2. Note: GTV gross target volume, PTV planning target volume