Abstract：
PURPOSE:The purpose of this study was to compare dynamic 18F-FGln PET/CT images of healthy subjects and cancer patients and explore the best imaging phase for different cancers. METHODS:Thirteen healthy volunteers and 31 cancer patients separately underwent 18F-FGln and 18F-FDG PET/CT scans within 1 week. The distributions of 18F-FGln and 18F-FDG in the whole body and the tumor avidity were analyzed and compared. The tumor maximum standardized uptake values (SUVmax) and tumor-to-nontumor SUV ratio (SUR) of 18F-FGln/PET at different scan phases were compared. RESULTS:Compared to the healthy subjects, the cancer patients had lower 18F-FGln activity (SUVmean) in most normal organs, especially in the lung, muscle, spleen, and heart (p < 0.05). Additionally, the FGln-avid tumors did not necessarily manifest as FDG-avid and vice versa. Overall, among the 31 primary malignant lesions confirmed by biopsy or postoperative pathological analysis, 29 showed increased radioactive uptake on all 18F-FGln PET/CT imaging phases. The peak of SUVmax in breast and thyroid cancers was within 10 min, while in lung cancers, the plateau of SUVmax was within 30 min to 60 min. The SURs of lung cancer (p = 0.046) and thyroid cancer (p = 0.794) increased from the early-phase to the late-phase acquisition; however, a significant decrease was observed in the breast lesions (p = 0.022). CONCLUSIONS:18F-FGln images may further supplement the diagnostic ability of 18F-FDG in cancer patients and detect metabolic changes in different tumors. Furthermore, the imaging time for 18F-FGln PET/CT needs to be optimized for different cancer types to improve the contrast resolution of tumors.
journal_name
Eur J Nucl Med Mol Imagingauthors
Xu X,Zhu H,Liu F,Zhang Y,Yang J,Zhang L,Xie Q,Zhu L,Li N,Kung HF,Yang Zdoi
10.1007/s00259-019-04543-wsubject
Has Abstractpub_date
2020-09-01 00:00:00pages
2280-2292issue
10eissn
1619-7070issn
1619-7089pii
10.1007/s00259-019-04543-wjournal_volume
47pub_type
杂志文章abstract：PURPOSE:To determine the metabolic profiles of the translocator protein ligands PBR102 and PBR111 in rat and human microsomes and compare their in vivo binding and metabolite uptake in the brain of non-human primates (Papio hamadryas) using PET-CT. METHODS:In vitro metabolic profiles of PBR102 and PBR111 in rat and hu...
journal_title：European journal of nuclear medicine and molecular imaging
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journal_title：European journal of nuclear medicine and molecular imaging
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journal_title：European journal of nuclear medicine and molecular imaging
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journal_title：European journal of nuclear medicine and molecular imaging
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journal_title：European journal of nuclear medicine and molecular imaging
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