Early Experience of Helical Tomotherapy for Hepatobiliary Radiotherapy
Table 3
Treatment characteristics and dosimetric results.
Patients
Radiation dose per fraction (/F)
Concurrent capecitabine (mg·m²·day)
Median dose to the PTV
PTV volume (cc)
Normal liver volume (cc)
Normal liver V30 (%)
Median normal liver dose (Gy)
Median right kidney dose (Gy)
1
54 Gy 2 Gy/F
no
56.6
417.7
1244
8
25.5
1.7
2
54 Gy 2 Gy/F
1500
57.2
381
1726.2
37
25.9
5.3
3
60 Gy 2 Gy/F
1500
61
268
1424,3
12
12.1
1.5
4
54 Gy 60 Gy 2 Gy/F
1500
55.5 61.6
671.9 143.5
1653.9
7,5
13.2
9.7
5
54 Gy 1.8 Gy/F
1600
54.1
174.6
892.9
17.5
15.7
4.4
6
54 Gy 1.8 Gy/F
no
54
262.6
857
30
22.1
2.1
7
60 Gy 2 Gy/F
no
61.1
121
1160.1
10
14.3
1.6
8
54 Gy 2 Gy/F
1500
54
93.9
1272.3
6
9.7
4.5
9
54 Gy 60 Gy 2 Gy/F
1500
54 59.8
275.9 221.7
1484.1
37.2
25.6
4.5
PTV: planning target volume; Normal liver volume: liver volume minus PTV; V30: percentage of the normal liver receiving 30 Gy or more; For patient 4 and patient 9, two levels of dose were prescribed: 54 Gy to the PTV 1 (gross tumour volume (GTV) + 2 cm margin) and 60 Gy to the PTV2 (GTV + 1 cm margin); Median dose to the PTV1; Median dose to the PTV.