Hot-clot artifacts in the lung parenchyma on F-18 fluorodeoxyglucose positron emission tomography/CT due to faulty injection techniques: two case reports

• Published in: Korean journal of radiology Vol. 15; no. 4; pp. 530 - 533
• Main Authors: Ozdemir, Elif, Poyraz, Nilufer Yildirim, Keskin, Mutlay, Kandemir, Zuhal, Turkolmez, Seyda
• Format: Journal Article
• Language: English
• Published: Korea (South) The Korean Society of Radiology 01-07-2014; 대한영상의학회
• Subjects: Case reports; False Positive Reactions; Female; Fluorodeoxyglucose F18 - administration & dosage; Fluorodeoxyglucose F18 - pharmacokinetics; Glucose; Humans; Lung - diagnostic imaging; Lung - metabolism; Lymphoma; Male; Medical imaging; Metabolism; Metastasis; Middle Aged; Multimodal Imaging - methods; Nuclear Medicine; Patients; Positron-Emission Tomography - methods; Pulmonary Embolism - diagnostic imaging; Radiopharmaceuticals - administration & dosage; Radiopharmaceuticals - pharmacokinetics; Tomography; Tomography, X-Ray Computed - methods; Ventilation; Young Adult; 방사선과학; False positive; FDG PET/CT; Microembolism
• ISSN: 1229-6929; 2005-8330
• DOI: 10.3348/kjr.2014.15.4.530

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.