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Correction based data driven algorithms
Discrepancies due to errors in input data or approximations due
to grid size“
Problem may exist for calculating beams for which calculation
conditions are significantly different from data acquisition
conditions, e.g, extended SSD . Accuracy should be verified for
these conditions”
However, these algorithms are still used in many checking
computers, so their limitations needs to be known
These Simple measurement based dose algorithms become complicated
when we need to correct for:
•
Obliquity
•
Blocks
•
Heterogeneity
•
Penumbra