What are the advantages/disadvantages of using static IMRT vs VMAT when treating breast cancer?  

I think like most disease sites, you gain conformity and possibly more homogenous dose, while the low-dose bath increases.  For PBI, I strongly prefer VMAT rather than mini-tangents with FIF (a type of IMRT). I have not found tangential inverse-planned RT to be beneficial in these cases. The V...

IMRT techniques vary widely. I agree with Dr. @Parikh that the plan quality is very dependent upon the experience and skill of the dosimetrist, and very likely on the planning system capabilities. It is interesting that some are seeing higher mean heart doses with IMRT, as I often use this technique...