**5. Conclusions**

Although there was a significant increase in SUVmax on delayed images in pelvic and extra-pelvic LNM in comparison to early [68Ga]Ga-PSMA PET/CT in our study, the LPR was comparable, especially in the assessment of small subcentimeter pelvic PCa lesions in patients with multiple metastases.

The few additional findings, respectively, the confirmed lesions in the late images, had no effect on staging or restaging of PCa, as they did not lead to any modification of the final interpretation or TNM classification and did not change patient management. However, in a few individual cases, additional late scans provided an information advantage in PCa lesion detection due to a higher tracer uptake and an improved contrast.

**Author Contributions:** Conceptualization, M.A.H., H.-G.B., H.J.W., M.M. and M.S.; methodology, M.A.H., H.-G.B., H.J.W., M.M., F.R. and M.S.; software, M.A.H., H.-G.B. and N.F.; validation, M.A.H., H.-G.B., H.J.W., M.M., F.R., N.F. and M.S.; formal analysis, M.A.H., H.-G.B., H.J.W., M.M., F.R. and N.F.; investigation, M.A.H., H.J.W. and M.M.; resources, M.A.H., H.-G.B., H.J.W. and M.M.; data curation, H.J.W., M.M. and M.S.; writing—original draft preparation, M.A.H., H.-G.B., H.J.W., M.M. and M.S.; writing—review and editing, H.J.W., M.M., F.R., N.F. and M.S.; visualization, M.A.H., H.-G.B. and M.S.; supervision, M.M. and M.S.; project administration, H.J.W., M.M. and M.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** The authors wish to express their gratitude to Ed Michaelson, MD, Fort Lauderdale, Florida, USA for language revision and to Rainer Arenz, Wolken, Germany, for technical support.

**Conflicts of Interest:** The authors declare no conflict of interest.

#### **References**


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