Nuclear Medicine

European Radiology

, Volume 13, Issue 9, pp 2122-2127

First online:

Iatrogenic FDG foci in the lungs: a pitfall of PET image interpretation

  • Thomas F. HanyAffiliated withDepartment of Nuclear Medicine, University Hospital, Rämistrasse 100, 8091 Zurich, Switzerland
  • , Juerg HeubergerAffiliated withDepartment of Nuclear Medicine, University Hospital, Rämistrasse 100, 8091 Zurich, Switzerland
  • , Gustav K. von SchulthessAffiliated withDepartment of Nuclear Medicine, University Hospital, Rämistrasse 100, 8091 Zurich, Switzerland Email author 

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Abstract.

2-[F-18]-fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (PET) has become an important staging modality for many tumors, including bronchial carcinoma; however it is important to know that there are several pitfalls in PET image interpretation. In this report we demonstrate three cases in which focal intrapulmonary FDG uptake could possibly represent iatrogenic microembolism. These FDG accumulations would have been interpreted as malignant tumor mass in the lung if no anatomic correlation would have been performed. For this reason, we further present an integrated PET/CT scanner, which recently has been introduced. This correlation of molecular and morphological information enables the specification of the FDG-PET findings.

Keywords.

Positron emission tomography CT FDG PET/CT scanners Tumors