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. 2014 Jun 21;87(1038):20130307. doi: 10.1259/bjr.20130307

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© 2014 The Authors. Published by the British Institute of Radiology

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Figure 3. — A 75-year-old male patient with large-cell neuroendocrine carcinoma in the right upper lobe. (a) Thin-section CT shows a cancer with a diameter of 38 mm in the right upper lobe. (b) Diffusion-weighted imaging (DWI) shows slightly high signal intensity. The apparent diffusion coefficient value for the cancer is 2.07 × 10⁻³ mm² s⁻¹. Quantitative assessment of DWI identified this case as non-small-cell lung cancer. (c) Short tau inversion recovery (STIR) also shows remarkable high intensity. The contrast ratio for the cancer is 1.46. This is a false-positive case on the quantitative assessment of STIR.