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Contribution of nonattenuation-corrected images on FDG-PET/CT in the assessment of solitary pulmonary nodules

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Abstract

In this study, we aim to determine the diagnostic performance of nonattenuation-corrected (NAC) and attenuation-corrected (AC) FDG-PET/CT images in the assessment of solitary pulmonary nodule (SPN). We reviewed the images of 41 patients who underwent FDG-PET/CT to diagnose SPNs. The visual analysis of FDG uptake intensity in SPN on AC and NAC PET images was made using a four-point score from 1 to 4 on both AC and NAC PET images. The cutoff value of SUVmax and visual uptake scores for malignancy were defined as ≥2.5 and ≥3, respectively. The significant visual uptake (≥2 visual point score) on AC and NAC PET images was considered to be positive 18F-FDG PET findings for lesion detectability. The sensitivity, specificity and diagnostic accuracy were calculated for AC and NAC PET images. Based on the histopathology and imaging data, 22 of the SPNs (54 %) were malignant and 19 of them (46 %) were benign. The sensitivity and NPV were found to be 100 % in the detection of SPNs for AC and NAC PET images. For all SPNs and SPNs ≤2 cm, NAC PET image had a higher diagnostic performance for the SPN characterization as malignant or benign, when compared with AC PET image. The success rates of AC and NAC PET images were found to be similar for the detection of SPNs. NAC PET image had a higher diagnostic performance for the SPN characterization. It is thought that NAC PET image may provide additional contributions for characterization of SPNs.

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Authors and Affiliations

  1. Department of Nuclear Medicine, Namık Kemal University Hospital, Tekirdağ, Turkey

    Ertan Şahin

  2. Department of Nuclear Medicine, Private OSM-Ortadoğu Hospital, Şanlıurfa, Turkey

    Ahmet Kara

  3. Department of Nuclear Medicine, Gaziantep University Hospital, Gaziantep, Turkey

    Umut Elboğa

Authors
  1. Ertan Şahin
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  2. Ahmet Kara
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  3. Umut Elboğa
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Correspondence to Ertan Şahin.

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Şahin, E., Kara, A. & Elboğa, U. Contribution of nonattenuation-corrected images on FDG-PET/CT in the assessment of solitary pulmonary nodules. Radiol med 121, 944–949 (2016). https://doi.org/10.1007/s11547-016-0681-y

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  • DOI: https://doi.org/10.1007/s11547-016-0681-y

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