How long before having PET scan during first round of chemo?

[addiemoose]

Hi! My dear one is receiving Taxotere, carboplatin, Herceptin and Perjeta for MBC, mets to lymph and liver. Started chemo around New Years, and tumors don't appear to have shrunk yet. When is the usual amount of time between starting chemo and having a PET scan? Thanks!!

[Lauriesh]

When I was on chemo, I would have them every 3 months. Now that I am just on her/per I have them every 6 months.

Laurie

[KaiM]

Mine have always been at three month intervals unless my onc has a concern (coughing, pain, etc) and then she may do it sooner.