Focal pulmonary abnormalities: evaluation with F-18 fluorodeoxyglucose PET scanning

Radiology. 1993 Aug;188(2):487-90. doi: 10.1148/radiology.188.2.8327702.


The authors assessed the role of positron emission tomography (PET) with fluorine-18 fluorodeoxyglucose (FDG) in differentiation of benign from malignant focal pulmonary abnormalities seen on chest radiographs. Fifty-one patients underwent FDG PET scanning. Focal abnormalities at radiography included solitary pulmonary nodules (n = 38), pulmonary masses (n = 5), and poorly marginated infiltrates or opacities (n = 8). Proof of diagnosis was obtained by means of transbronchial biopsy (n = 21), open lung biopsy (n = 14), percutaneous needle biopsy (n = 14), or cytologic evaluation of sputum (n = 1). A nodule in one patient had been radiographically stable for at least 8 years. Quantitative analysis was performed by calculation of a standardized uptake ratio (SUR). Thirty-three malignant lesions had a mean SUR (+/- 1 standard deviation) of 6.5 +/- 2.9. Eighteen benign lesions had a mean SUR of 1.7 +/- 1.2. For a benign lesion with SUR of 2.5 or less, specificity of FDG PET was 100%, while sensitivity was 89%. These results suggest that FDG PET is accurate in differentiation of benign from malignant focal pulmonary abnormalities.

MeSH terms

  • Adult
  • Aged
  • Deoxyglucose / analogs & derivatives*
  • Female
  • Fluorine Radioisotopes*
  • Fluorodeoxyglucose F18
  • Humans
  • Lung Diseases / diagnostic imaging*
  • Lung Neoplasms / diagnostic imaging*
  • Male
  • Middle Aged
  • Tomography, Emission-Computed*


  • Fluorine Radioisotopes
  • Fluorodeoxyglucose F18
  • Deoxyglucose