% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{AfsharOromieh:126018, author = {A. Afshar-Oromieh$^*$ and H. Hetzheim$^*$ and C. Kratochwil$^*$ and M. Benesova$^*$ and M. Eder$^*$ and O. Neels$^*$ and M. Eisenhut$^*$ and W. Kübler$^*$ and T. Holland-Letz$^*$ and F. Giesel$^*$ and W. Mier$^*$ and K. Kopka$^*$ and U. Haberkorn$^*$}, title = {{T}he {T}heranostic {PSMA} {L}igand {PSMA}-617 in the {D}iagnosis of {P}rostate {C}ancer by {PET}/{CT}: {B}iodistribution in {H}umans, {R}adiation {D}osimetry, and {F}irst {E}valuation of {T}umor {L}esions.}, journal = {Journal of nuclear medicine}, volume = {56}, number = {11}, issn = {0161-5505}, address = {Reston, Va.}, publisher = {SNM58412}, reportid = {DKFZ-2017-02133}, pages = {1697-1705}, year = {2015}, abstract = {PET imaging with the prostate-specific membrane antigen (PSMA)-targeted radioligand (68)Ga-PSMA-11 is regarded as a significant step forward in the diagnosis of prostate cancer (PCa). More recently, a PSMA ligand was developed that can be labeled with (68)Ga, (111)In, (177)Lu, and (90)Y. This ligand, named PSMA-617, therefore enables both diagnosis and therapy of PCa. The aims of this evaluation were to clinically investigate the distribution of (68)Ga-PSMA-617 in normal tissues and in PCa lesions as well as to evaluate the radiation exposure by the radioligand in PET imaging.Nineteen patients, most of them with recurrent PCa, were referred for (68)Ga-PSMA-617 PET/CT. The quantitative assessment of tracer uptake of several organs and of 53 representative tumor lesions was performed in 15 patients at 1 and 3 h after injection. In 4 additional patients, the same procedure was conducted at 5 min, 1 h, 2 h, 3 h, 4 h, and 5 h after injection. On the basis of the data for these 4 patients (mean injected dose, 231 MBq), the radiation exposure of a (68)Ga-PSMA-617 PET/CT was identified.Intense tracer uptake was observed in the kidneys and salivary glands. In 14 of 19 patients $(73.7\%),$ at least 1 lesion suspected of being a tumor was detected at 3 h after injection. Of 53 representative tumor lesions selected at 3 h after injection, 47 lesions were visible at 1 h after injection. The mean tumor-to-background ratio for maximum standardized uptake value was 20.4 ± 17.3 (range, 2.3-84.0) at 1 h after injection and 38.2 ± 38.6 (range, 3.6-154.3) at 3 h after injection. The average radiation exposure (effective dose) was approximately 0.021 mSv/MBq.Within healthy organs, the kidneys and salivary glands showed the highest (68)Ga-PSMA-617 uptake. The radiation exposure was relatively low. (68)Ga-PSMA-617 shows PCa lesions with high contrast. Images obtained between 2 and 3 h after injection seem to be the best option with regard to radiotracer uptake and tumor contrast. Later images can help to clarify unclear lesions.}, keywords = {(68Ga)Glu-urea-Lys(Ahx)-HBED-CC (NLM Chemicals) / Dipeptides (NLM Chemicals) / Gallium Radioisotopes (NLM Chemicals) / Heterocyclic Compounds, 1-Ring (NLM Chemicals) / Organometallic Compounds (NLM Chemicals) / PSMA-617 (NLM Chemicals) / Radiopharmaceuticals (NLM Chemicals) / Prostate-Specific Antigen (NLM Chemicals)}, cin = {E060 / E020 / E030 / W060 / C060}, ddc = {610}, cid = {I:(DE-He78)E060-20160331 / I:(DE-He78)E020-20160331 / I:(DE-He78)E030-20160331 / I:(DE-He78)W060-20160331 / I:(DE-He78)C060-20160331}, pnm = {315 - Imaging and radiooncology (POF3-315)}, pid = {G:(DE-HGF)POF3-315}, typ = {PUB:(DE-HGF)16}, pubmed = {pmid:26294298}, doi = {10.2967/jnumed.115.161299}, url = {https://inrepo02.dkfz.de/record/126018}, }