Table 2 Summary of FSRT parameters

Tumor volume (cm³)

13.45 (0.60–77.13)

Total prescribed dose (Gy)

19.5 (8.0–32.0)

Fractional dose (Gy)

>5 Gy

33 (24.3)

≤5 Gy

103 (75.7)

Fraction number

5 (2–8)

Time to FSRT after EBRT (days)

24.5 (2–147)

FSRT type

Collimator based

105 (77.2)

MLC based

31 (22.8)

Prescribed isodose line (%)

90 (70–90)

Number of isocenters

1

82 (60.3)

2

46(33.8)

3

8 (5.9)