TVD 2016

Target volumes – PRV • Spinal cord & optic nerves/chiasm perfect examples where a PRV  may be helpful • serial tissue organisation • damage is clinically catastrophic

•

Add PRV i ll if hi h d  a  , espec a y  g oses are p anne • Almost no other OARs where a PRV is needed • PRV may be misleading for parallel organs l

d

(This advice is more definitive than ICRU 83)