Frederik L Giesel1,2, Leon Will1, Ismaheel Lawal3, Thabo Lengana3, Clemens Kratochwil1, Mariza Vorster3, Oliver Neels4, Florette Reyneke3, Uwe Haberkon1,2, Klaus Kopka4, Mike Sathekge5. 1. Department of Nuclear Medicine, Heidelberg University Hospital, Heidelberg, Germany. 2. Cooperation Unit Nuclear Medicine, German Cancer Research Center, Heidelberg, Germany. 3. Department of Nuclear Medicine, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa; and. 4. Division of Radiopharmaceutical Chemistry, German Cancer Research Center, Heidelberg, Germany. 5. Department of Nuclear Medicine, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa; and mike.sathekge@up.ac.za.
Abstract
The introduction of 18F-labeled prostate-specific membrane antigen (PSMA)-targeted PET/CT tracers, first 18F-DCFPyL (2-(3-{1-carboxy-5-[(6-18F-fluoro-pyridine-3-carbonyl)-amino]-pentyl}-ureido)-pentanedioic acid) and more recently 18F-PSMA-1007 (((3S,10S,14S)-1-(4-(((S)-4-carboxy-2-((S)-4-carboxy-2-(6-18F-fluoronicotinamido)butanamido)butanamido)methyl)phenyl)-3-(naphthalen-2-ylmethyl)-1,4,12-trioxo-2,5,11,13-tetraazahexadecane-10,14,16-tricarboxylic acid)), have demonstrated promising results for the diagnostic workup of prostate cancer. This clinical study presents an intraindividual comparison to evaluate tracer-specific characteristics of 18F-DCFPyL versus 18F-PSMA-1007. Methods: Twelve prostate cancer patients, drug-naïve or before surgery, received similar activities of about 250 MBq of 18F-DCFPyL and 18F-PSMA-1007 48 h apart and were imaged 2 h after injection on the same PET/CT scanner using the same reconstruction algorithm. Normal-organ biodistribution and tumor uptake were quantified using SUVmax Results: PSMA-positive lesions were detected in 12 of 12 prostate cancer patients. Both tracers, 18F-DCFPyL and 18F-PSMA-1007, detected the same lesions. No statistical significance could be observed when comparing the SUVmax of 18F-DCFPyL and 18F-PSMA-1007 for local tumor, lymph node metastases, and bone metastases. With regard to normal organs, 18F-DCFPyL had statistically significant higher uptake in kidneys, urinary bladder, and lacrimal gland. Vice versa, significantly higher uptake of 18F-PSMA-1007 in muscle, submandibular and sublingual gland, spleen, pancreas, liver, and gallbladder was observed. Conclusion: Excellent imaging quality was achieved with both 18F-DCFPyL and 18F-PSMA-1007, resulting in identical clinical findings for the evaluated routine situations. Nonurinary excretion of 18F-PSMA-1007 might present some advantage with regard to delineation of local recurrence or pelvic lymph node metastasis in selected patients; the lower hepatic background might favor 18F-DCFPyL in late stages, when rare cases of liver metastases can occur.
The introduction of 18F-labeled prostate-specific membrane antigen (PSMA)-targeted PET/CT tracers, first 18F-DCFPyL (2-(3-{1-carboxy-5-[(6-18F-fluoro-pyridine-3-carbonyl)-amino]-pentyl}-ureido)-pentanedioic acid) and more recently 18F-PSMA-1007 (((3S,10S,14S)-1-(4-(((S)-4-carboxy-2-((S)-4-carboxy-2-(6-18F-fluoronicotinamido)butanamido)butanamido)methyl)phenyl)-3-(naphthalen-2-ylmethyl)-1,4,12-trioxo-2,5,11,13-tetraazahexadecane-10,14,16-tricarboxylic acid)), have demonstrated promising results for the diagnostic workup of prostate cancer. This clinical study presents an intraindividual comparison to evaluate tracer-specific characteristics of 18F-DCFPyL versus 18F-PSMA-1007. Methods: Twelve prostate cancerpatients, drug-naïve or before surgery, received similar activities of about 250 MBq of 18F-DCFPyL and 18F-PSMA-1007 48 h apart and were imaged 2 h after injection on the same PET/CT scanner using the same reconstruction algorithm. Normal-organ biodistribution and tumor uptake were quantified using SUVmax Results:PSMA-positive lesions were detected in 12 of 12 prostate cancerpatients. Both tracers, 18F-DCFPyL and 18F-PSMA-1007, detected the same lesions. No statistical significance could be observed when comparing the SUVmax of 18F-DCFPyL and 18F-PSMA-1007 for local tumor, lymph node metastases, and bone metastases. With regard to normal organs, 18F-DCFPyL had statistically significant higher uptake in kidneys, urinary bladder, and lacrimal gland. Vice versa, significantly higher uptake of 18F-PSMA-1007 in muscle, submandibular and sublingual gland, spleen, pancreas, liver, and gallbladder was observed. Conclusion: Excellent imaging quality was achieved with both 18F-DCFPyL and 18F-PSMA-1007, resulting in identical clinical findings for the evaluated routine situations. Nonurinary excretion of 18F-PSMA-1007 might present some advantage with regard to delineation of local recurrence or pelvic lymph node metastasis in selected patients; the lower hepatic background might favor 18F-DCFPyL in late stages, when rare cases of liver metastases can occur.
Authors: Christian Uprimny; Steffen Bayerschmidt; Alexander Stephan Kroiss; Josef Fritz; Bernhard Nilica; Anna Svirydenka; Clemens Decristoforo; Gianpaolo di Santo; Elisabeth von Guggenberg; Wolfgang Horninger; Irene Johanna Virgolini Journal: Eur J Nucl Med Mol Imaging Date: 2020-05-08 Impact factor: 9.236
Authors: Paul Flechsig; Ramin Rastgoo; Clemens Kratochwil; Ole Martin; Tim Holland-Letz; Alexander Harms; Hans-Ulrich Kauczor; Uwe Haberkorn; Frederik L Giesel Journal: Mol Imaging Biol Date: 2018-12 Impact factor: 3.488
Authors: Christos Sachpekidis; A Afshar-Oromieh; K Kopka; D S Strauss; L Pan; U Haberkorn; A Dimitrakopoulou-Strauss Journal: Eur J Nucl Med Mol Imaging Date: 2019-11-14 Impact factor: 9.236
Authors: Daniela A Ferraro; Helena I Garcia Schüler; Urs J Muehlematter; Daniel Eberli; Julian Müller; Alexander Müller; Roger Gablinger; Helmut Kranzbühler; Aurelius Omlin; Philipp A Kaufmann; Thomas Hermanns; Irene A Burger Journal: Eur J Nucl Med Mol Imaging Date: 2019-12-04 Impact factor: 9.236