FAPI-74 PET/CT using either 18F-AlF or cold-kit 68Ga labeling: biodistribution, radiation Dosimetry, and tumor delineation in lung cancer patients
68Ga-fibroblast activation protein inhibitors (FAPIs) 2, 4, and 46 have already been proposed as promising PET tracers. However, the short half-life of 68Ga (68 min) creates problems with manufacture and delivery. 18F (half-life, 110 min) labeling would result in a more practical large-scale product...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
February 1, 2021
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| In: |
Journal of nuclear medicine
Year: 2021, Jahrgang: 62, Heft: 2, Pages: 201-207 |
| ISSN: | 2159-662X |
| DOI: | 10.2967/jnumed.120.245084 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.2967/jnumed.120.245084 Verlag, lizenzpflichtig, Volltext: https://jnm.snmjournals.org/content/62/2/201 
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| Verfasserangaben: | Frederik L. Giesel, Sebastian Adeberg, Mustafa Syed, Thomas Lindner, Luis David Jiménez-Franco, Eleni Mavriopoulou, Fabian Staudinger, Eric Tonndorf-Martini, Sebastian Regnery, Stefan Rieken, Rami El Shafie, Manuel Röhrich, Paul Flechsig, Andreas Kluge, Annette Altmann, Jürgen Debus, Uwe Haberkorn, Clemens Kratochwil |
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| 245 | 1 | 0 | |a FAPI-74 PET/CT using either 18F-AlF or cold-kit 68Ga labeling |b biodistribution, radiation Dosimetry, and tumor delineation in lung cancer patients |c Frederik L. Giesel, Sebastian Adeberg, Mustafa Syed, Thomas Lindner, Luis David Jiménez-Franco, Eleni Mavriopoulou, Fabian Staudinger, Eric Tonndorf-Martini, Sebastian Regnery, Stefan Rieken, Rami El Shafie, Manuel Röhrich, Paul Flechsig, Andreas Kluge, Annette Altmann, Jürgen Debus, Uwe Haberkorn, Clemens Kratochwil |
| 246 | 3 | 3 | |a FAPI-74 PET/CT using either 18 F-AlF or cold-kit 68 Ga labeling |
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| 520 | |a 68Ga-fibroblast activation protein inhibitors (FAPIs) 2, 4, and 46 have already been proposed as promising PET tracers. However, the short half-life of 68Ga (68 min) creates problems with manufacture and delivery. 18F (half-life, 110 min) labeling would result in a more practical large-scale production, and a cold-kit formulation would improve the spontaneous availability. The NOTA chelator ligand FAPI-74 can be labeled with both 18F-AlF and 68Ga. Here, we describe the in vivo evaluation of 18F-FAPI-74 and a proof of mechanism for 68Ga-FAPI-74 labeled at ambient temperature. Methods: In 10 patients with lung cancer, PET scans were acquired at 10 min, 1 h, and 3 h after administration of 259 ± 26 MBq of 18F-FAPI-74. Physiologic biodistribution and tumor uptake were semiquantitatively evaluated on the basis of SUV at each time point. Absorbed doses were evaluated using OLINDA/EXM, version 1.1, and QDOSE dosimetry software with the dose calculator IDAC-Dose, version 2.1. Identical methods were used to evaluate one examination after injection of 263 MBq of 68Ga-FAPI-74. Results: The highest contrast was achieved in primary tumors, lymph nodes, and distant metastases at 1 h after injection, with an SUVmax of more than 10. The effective dose per a 100-MBq administered activity of 18F-FAPI-74 was 1.4 ± 0.2 mSv, and for 68Ga-FAPI-74 it was 1.6 mSv. Thus, the radiation burden of a diagnostic 18F-FAPI-74 PET scan is even lower than that of PET scans with 18F-FDG and other 18F tracers; 68Ga-FAPI-74 is comparable to other 68Ga ligands. FAPI PET/CT supported target volume definition for guiding radiotherapy. Conclusion: The high contrast and low radiation burden of FAPI-74 PET/CT favor multiple clinical applications. Centralized large-scale production of 18F-FAPI-74 or decentralized cold-kit labeling of 68Ga-FAPI-74 allows flexible routine use. | ||
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