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Oliver Jäkel
Medical Physics
LET in a mixed field of radiation
For practical applications like in TP, RBE is based on LET
d
,
But in most cell experiments LET
t
is specified!
In a mixed radiation field, LET is usually defined as a dose
weighted average (LET
d
) or as a fluence weighted average (LET
t
):
The use of an averaged LET to derive RBE, or for treatment
planning is a purely empirical concept!