Subclass analysis of malignant,iInflammatory and degenerative pathologies based on multiple timepoint FAPI-PET acquisitions using FAPI-02, FAPI-46 and FAPI-74

• Verfasst von: Glatting, Frederik M. [VerfasserIn]
• Verfasst von: Hoppner, Jorge [VerfasserIn]
• Verfasst von: Kauczor, Hans-Ulrich [VerfasserIn]
• Verfasst von: Huber, Peter E. [VerfasserIn]
• Verfasst von: Kratochwil, Clemens [VerfasserIn]
• Verfasst von: Giesel, Frederik L. [VerfasserIn]
• Verfasst von: Haberkorn, Uwe [VerfasserIn]
• Verfasst von: Röhrich, Manuel [VerfasserIn]
• Titel: Subclass analysis of malignant,iInflammatory and degenerative pathologies based on multiple timepoint FAPI-PET acquisitions using FAPI-02, FAPI-46 and FAPI-74
• Verf.angabe: Frederik M. Glatting, Jorge Hoppner, Hans-Ulrich Kauczor, Peter E. Huber, Clemens Kratochwil, Frederik L. Giesel, Uwe Haberkorn and Manuel Röhrich
• E-Jahr: 2022
• Jahr: 28 October 2022
• Umfang: 20 S.
• Fussnoten: Gesehen am 23.01.2023
• Titel Quelle: Enthalten in: Cancers
• Ort Quelle: Basel : MDPI, 2009
• Jahr Quelle: 2022
• Band/Heft Quelle: 14(2022), 21, Artikel-ID 5301, Seite 1-20
• ISSN Quelle: 2072-6694
• DOI: doi:10.3390/cancers14215301
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: cancer
• Sach-SW: degeneration
• Sach-SW: FAPI
• Sach-SW: fibroblast activation protein
• Sach-SW: inflammation
• Sach-SW: pancreatic carcinoma
• Sach-SW: pancreatitis
• Sach-SW: PET
• K10plus-PPN: 1831768615

Abstract

Purpose: FAPI-PET is a promising imaging technique for various malignant as well as non-malignant pathologies. In a recent retrospective analysis, we evaluated the diagnostic value of repetitive early FAPI-PET-imaging with FAPI-02, FAPI-46 and FAPI-74 for malignant, inflammatory/reactive and degenerative pathologies. Here, we apply a subgroup analysis to that dataset and describe the tracer-wise uptake kinetic behavior of multiple types of FAPI-positive lesions, which are encountered frequently during clinical routine. Methods: A total of 24 cancer patients underwent whole-body FAPI-PET scans, and images were acquired at 10, 22, 34, 46 and 58 min after the administration of 150-250 MBq of 68Ga-FAPI tracer molecules (eight patients each regarding FAPI-02, FAPI-46 and FAPI-74). Standardized uptake values (SUVmax and SUVmean) of healthy tissues, cancer manifestations and non-malignant lesions were measured and target-to-background ratios (TBR) versus blood and fat were calculated for all acquisition timepoints. Results: Differential uptake behavior over time was observed in several subclasses of malignant lesions, inflammatory/reactive lesions and degenerative lesions. These differences over time were particularly manifested in the direct comparison between the uptakes associated with pancreatic carcinoma (stable or increasing over time) and inflammatory lesions of the pancreas (markedly decreasing over time). Furthermore, marked differences were found between the three tracer variants regarding their time-dependent uptake and TBRs within different subclasses of malignant, inflammatory/reactive and degenerative pathologies. Conclusion: Multiple timepoint FAPI-PET/CT is a promising innovative imaging technique that provides additional imaging information compared to single timepoint imaging. Differences in the kinetic behavior of malignant and benign pathologies can facilitate the interpretation of FAPI-positive lesions.