348-349 / 2953
Comparative planning study: IMRT vs PBT in
pelvic Ewing Sarcoma
VMAT
Good bowel, rectum and bladder sparing
Femoral head within tolerance
Spare one ovary to mean dose 4.3Gy
Uterus mean dose <10Gy in 80% of cases
Low dose bath
IMPT
•
Superior sparing of:
•
Femoral head
•
Ovaries
•
Uterus
•
No low dose bath but high entry dose
38
Le Grange, Amos, Bodey, Seddon, UCLH 2015