825 / 1173
SRS – whole cord vs hemi-cord irradiation
Dos
e
(Gy)
response
16
0/2
18
1/3
20
4/4
22
3/3
ED
50
≈ 19 Gy
Dos
e
(Gy)
response
16
0/5
18
1/5
20
4/5
22
4/4
24
4/4
whole cord
hemi cord
• Similar dose response for whole cord compared to
hemi-cord irradiation.
• Morbidity is less for hemi-cord as lesions are limited to
lateral high dose region