Thanks to all responders -
In the interim, have reviewed several published articles. In general, via AI, there is a lack of a definitive answers / a lot of conflicting reports.
One source states that if a scan was performed without a "full washout" (presumably time to reduce affects from last injection to PET scan), it may be advisable to discuss the scan report with a nuclear medicine specialist for a potential "adjusted interpretation".
As for me, I do not want another variable resulting in questioning scan results (i.e. maintain the 4-week minimum time period as the manufacture states): maybe good for insurance purposes as well?
Mark