How many days after Prolia injection should I wait before getting DEXA

I've been getting Prolia injections regularly for the last 2 years and am scheduled to get a DEXA scan. Is there a minimum number of days I should wait between my injection and getting the scan? I was diagnosed with early onset (premenopause) osteopenia and osteoporosis. Started treatment with Fosamax, bone density did not improve or stabilize, next step was Prolia.