% 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{Dietlein:874917, author = {Dietlein, Felix and Hohberg, Melanie and Kobe, Carsten and Zlatopolskiy, Boris D. and Krapf, Philipp and Endepols, Heike and Täger, Philipp and Hammes, Jochen and Heidenreich, Axel and Neumaier, Bernd and Drzezga, Alexander and Dietlein, Markus}, title = {{A}n 18 {F}-{L}abeled {PSMA} {L}igand for {PET}/{CT} of {P}rostate {C}ancer: {F}irst-in-{H}umans {O}bservational {S}tudy and {C}linical {E}xperience with 18 {F}-{JK}-{PSMA}-7 {D}uring the {F}irst {Y}ear of {A}pplication}, journal = {Journal of nuclear medicine}, volume = {61}, number = {2}, issn = {2159-662X}, address = {New York, NY}, publisher = {Soc.}, reportid = {FZJ-2020-01701}, pages = {202 - 209}, year = {2020}, abstract = {In preclinical trials, the recently developed tracer 2-methoxy-18F-DCFPyL (18F-JK-prostate-specific membrane antigen [PSMA]-7) has shown favorable properties regarding clinical performance and radiochemical accessibility. The aim of this study was to evaluate the clinical utility of 18F-JK-PSMA-7 for PET/CT imaging of patients with prostate cancer. Methods: In an Institutional Review Board–approved pilot study, the initial clinical utility of PET/CT imaging with 18F-JK-PSMA-7 was directly compared with 68Ga-PSMA-11 PET/CT in a group of 10 patients with prostate cancer. The 2 PSMA tracers were administered to each patient less than 3 wk apart. Next, we analyzed the data of 75 consecutive patients who had undergone clinical 18F-JK-PSMA-7 PET/CT imaging for tumor localization of biochemical recurrence (BCR). Results: The pilot study in 10 patients who were examined with both PSMA tracers demonstrated that 18F-JK-PSMA-7 was at least equivalent to 68Ga-PSMA-11. All unequivocally 68Ga-PSMA-11–positive lesions could be also detected using 18F-JK-PSMA-7, and in 4 patients additional suspected PSMA-positive lesions were identified (1 patient changed from PSMA-negative to PSMA-positive). In patients with BCR (after prostatectomy or radiotherapy), the capacity of 18F-JK-PSMA-7 PET/CT to detect at least one PSMA-positive lesion was $84.8\%.$ The prostate-specific antigen (PSA)–stratified detection rate of 18F-JK-PSMA-7 after prostatectomy varied among $54.5\%$ (6/11 patients; PSA < 0.5 μg/L), $87.5\%$ (14/16 patients; PSA 0.5–2 μg/L), and $90.9\%$ (20/22 patients; PSA > 2 μg/L). Conclusion: The tracer 18F-JK-PSMA-7 was found to be safe and clinically useful. We demonstrated that 18F-JK-PSMA-7 was not inferior when directly compared with 68Ga-PSMA-11 in a pilot study but indeed identified additional PSMA-avid suspected lesions in oligometastasized patients with BCR. In a subsequent analysis of a clinical cohort of BCR patients, 18F-JK-PSMA-7 was useful in tumor localization. 18F-JK-PSMA-7 is recommended for future prospective trials.}, cin = {INM-5 / INM-2}, ddc = {610}, cid = {I:(DE-Juel1)INM-5-20090406 / I:(DE-Juel1)INM-2-20090406}, pnm = {573 - Neuroimaging (POF3-573)}, pid = {G:(DE-HGF)POF3-573}, typ = {PUB:(DE-HGF)16}, pubmed = {pmid:31324713}, UT = {WOS:000512119600013}, doi = {10.2967/jnumed.119.229542}, url = {https://juser.fz-juelich.de/record/874917}, }