Organs

3D-CRT

IMRT

HT

right lens

5.5

1.2

2.3

left lens

6.5

1.0

2.3

esophagus

16.0

13.4

10.5

lungs

3.3

2.2

4.1

thyroid

14.2

12.1

6.7

larynx

6.3

1.0

10.2

3D-CRT: three dimensional conformal radiotherapy, IMRT: intensity-modulated radiation therapy, HT: helical tomotherapy.
Table 4: Planned average doses (in Gy) by craniospinal irradiation to healthy organs.