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Dose fractionation and recurrence rate of x-ray for keloids.
| Case (keloids) | Total dose/Fraction | Interval (hour) | Recurrence rate | References |
| (68) | 20 Gy/4 | 14 days | 23.5% | (103) |
| (28) | 16 Gy/4 | 14 days | 21.% | |
| 14 (15) | (8–10) Gy/2 | 24 | – | (104) |
| 1 | 15 Gy/3 | 2 | – | (105) |
| 84 (197) | (9–30) Gy/(1–10) | 36 | 19% | (60) |
| (188) | 16 Gy/4; 24 Gy/6; 30 Gy/10 | 168 | 33% | (106) |
| 64 (86) | 37.5 Gy/5 | – | – | (107) |
