title: Hot-clot artifacts in the lung parenchyma on F-18 fluorodeoxyglucose positron emission tomography/CT due to faulty injection techniques: two case reports.
abstract: F-18-fluorodeoxyglucose (FDG) positron emission tomography/CT is an important whole-body imaging tool in the oncology and widely utilized to stage and restage various malignancies. The findings of significant focal accumulation of FDG in the lung parenchyma in the absence of corresponding CT abnormalities are related to the lung microembolism and known as hot-clot artifacts. Herein we present two cases with focal FDG uptake in the lung parenchyma with no structural lesions on the CT scan and discuss the possible mechanisms.
authors: Department of Nuclear Medicine, Ataturk Training and Research Hospital, Ankara 06800, Turkey.
authors: Elif
authors: E
authors: Ozdemir
authors: Department of Nuclear Medicine, Ataturk Training and Research Hospital, Ankara 06800, Turkey.
authors: Nilufer Yildirim
authors: NY
authors: Poyraz
authors: Department of Nuclear Medicine, Ataturk Training and Research Hospital, Ankara 06800, Turkey.
authors: Mutlay
authors: M
authors: Keskin
authors: Department of Nuclear Medicine, Ataturk Training and Research Hospital, Ankara 06800, Turkey.
authors: Zuhal
authors: Z
authors: Kandemir
authors: Department of Nuclear Medicine, Ataturk Training and Research Hospital, Ankara 06800, Turkey.
authors: Seyda
authors: S
authors: Turkolmez
mesh_terms: D016477:Artifacts; D005189:False Positive Reactions; D005260:Female; D019788:Fluorodeoxyglucose F18 / Q000008:administration & dosage* / Q000493:pharmacokinetics; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging / Q000379:methods; D049268:Positron-Emission Tomography / Q000379:methods*; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging*; D019275:Radiopharmaceuticals / Q000008:administration & dosage* / Q000493:pharmacokinetics; D014057:Tomography, X-Ray Computed / Q000379:methods; D055815:Young Adult
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18
keywords: FDG PET/CT; False positive; Microembolism