356 / 1601
What happens in the other 99.6% ?
•
There are many small unavoidable errors (mm
size) in all steps of radiotherapy
•
In some cases many of these small errors point in the
same direction
•
I.e., in some patients large (cm) errors occur(ed)
•
This is not a fault, this is purely statistics
•
What effect does this have on treatment?
•
We do not really know!