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• W4210627172 abstract "Differentiating local recurrence (LR) from post-treatment changes following stereotactic ablative radiotherapy (SABR) for thoracic tumors is challenging. We sought to evaluate the performance of FDG-PET-CT in distinguishing recurrence from post-radiation changes in patients with stage I-II non-small cell lung cancer (NSCLC) treated with SABR.We performed a retrospective review of patients with stage I-II NSCLC treated with SABR and subsequently followed with surveillance FDG-PET-CT scans from 2004 to 2014. The radiology reports were coded as 0 or 1 if minimally or substantially concerning for LR, respectively, and correlated with outcome. Prognostic factors for false-positive FDG-PET-CT were assessed using logistic regression models.We identified 145 patients meeting inclusion criteria for the retrospective analysis. Amongst the 39 (26.9%) patients with FDG-PET-CT scans concerning for LR 3 to 24 months after treatment, 14 were confirmed to have LR. Thus, the positive predictive value (PPV) of FDG-PET-CT in identifying LR was 36% (14/39). Factors associated with a false-positive scan included concerning FDG-PET-CT at the earliest post-treatment time point (3 months) (odds ratio 0.67, P= .04) and older age (odds ratio 2.3, P= .02).Our analysis indicates that the PPV of a concerning FDG-PET-CT after SABR for early-stage NSCLC is relatively low, especially at early post-treatment timepoints, but accuracy is improving over time with institutional experience." @default.
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• W4210627172 date "2022-05-01" @default.
• W4210627172 modified "2023-10-16" @default.
• W4210627172 title "Detection of Recurrence after Thoracic Stereotactic Ablative Radiotherapy Using FDG-PET-CT" @default.
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• W4210627172 doi "https://doi.org/10.1016/j.cllc.2022.01.006" @default.
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