What plan parameters do you prioritize in 3D conformal breast treatment planning?

For whole breast 3D conformal RT, we contour surgical bed with 1 cm expansion for CTV and 3-5 mm for PTV.

Coverage whole breast 95% of volume to 95% of dose we aim for but we accept 90 to 95.

PTV (surgical bed) as above, 95% of volume to 100% of dose but accept 95 to 95 also.
Volume of breast getting 1...

My colleagues' approaches are reasonable. However, I would like to point out that there are few data to know what the optimal dose-fractionation, target goals, or normal-tissue constraints really are. (These issues are dealt with at greater length elsewhere - see Recht et al., PMID 30366007.)

We bega...

We contour cavity, lungs, heart, cord.

With respect to evaluating plan, I typically place 105%, 100%, 95%, and 90% lines on. I look for 95% line to cover breast (I don't routinely contour breast for 3D plans). For RNI cases, I contour IMNs and set SCV +/- PAB fields, and look for 95% coverage of nod...

Agree with @Dr. First Last and @Dr. First Last, but I do contour the breast tissue, that way there is an actual target. If you use the 95% isodose line to create the target, then it is automatically going to meet your coverage goal (by definition).

It doesn't take hours. I timed it and it takes abo...