Published in:
01-08-2015 | Research Article
Initial Evaluation of [18F]DCFPyL for Prostate-Specific Membrane Antigen (PSMA)-Targeted PET Imaging of Prostate Cancer
Authors:
Zsolt Szabo, Esther Mena, Steven P. Rowe, Donika Plyku, Rosa Nidal, Mario A. Eisenberger, Emmanuel S. Antonarakis, Hong Fan, Robert F. Dannals, Ying Chen, Ronnie C. Mease, Melin Vranesic, Akrita Bhatnagar, George Sgouros, Steve Y. Cho, Martin G. Pomper
Published in:
Molecular Imaging and Biology
|
Issue 4/2015
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Abstract
Purpose
Prostate-specific membrane antigen (PSMA) is a recognized target for imaging prostate cancer. Here we present initial safety, biodistribution, and radiation dosimetry results with [18F]DCFPyL, a second-generation fluorine-18-labeled small-molecule PSMA inhibitor, in patients with prostate cancer.
Procedures
Biodistribution was evaluated using sequential positron-emission tomography (PET) scans in nine patients with prostate cancer. Time-activity curves from the most avid tumor foci were determined. The radiation dose to selected organs was estimated using OLINDA/EXM.
Results
No major radiotracer-specific adverse events were observed. Physiologic accumulation was observed in known sites of PSMA expression. Accumulation in putative sites of prostate cancer was observed (SUVmax up to >100, and tumor-to-blood ratios up to >50). The effective radiation dose from [18F]DCFPyL was 0.0139 mGy/MBq or 5 mGy (0.5 rem) from an injected dose of 370 MBq (10 mCi).
Conclusions
[18F]DCFPyL is safe with biodistribution as expected, and its accumulation is high in presumed primary and metastatic foci. The radiation dose from [18F]DCFPyL is similar to that from other PET radiotracers.