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DCH as optimization criteria
Gordon et al., Med Phys 37:550, 2010
Calculate DVH for CTV
•
One entire treatment course
•
Create coverage map
Random error
•
Normal distribution
•
Infinite number of fractions
•
Convolution of dose (or fluence)
Systematic error
•
Sampled from normal distribution
•
Used to shift the CTV
Repeat for N treatments
Example of optimization objective:
DCH
98%
90% iso-probability line, DVH
90%
%
≥
≥ %
D
98%
D
presc