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. 2013 Dec 1;34(5):340–355. doi: 10.1111/cpf.12104

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© 2013 The Authors. Clinical Physiology and Functional Imaging published by John Wiley & Sons Ltd on behalf of Scandinavian Society of Clinical Physiology and Nuclear Medicine.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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PET/CT scan of a 60-year-old female with a tumour anterior in the right lung, easily visible on CT (a). However, on PET/CT, FDG uptake was hardly visible in the area of the tumour (b,c). Taking a closer look at the slices above the tumour (d–f), moderately focal increased FDG uptake was visible here (SUV_max = 4). This uptake corresponds to the tumour, but as a result of respiratory movements during PET acquisition, there is a misalignment between CT and FDG-PET. The patient was diagnosed with a carcinoid tumour, which explains the relatively low FDG uptake.