AI Article Synopsis
- The study aimed to assess how consistently different radiologists interpret chest CT scans for patients treated with SBRT for early-stage lung cancer or pulmonary metastases.
- 54 patients were analyzed over two follow-up periods, focusing on the agreement among three radiologists in identifying expected changes versus local recurrence in the scans.
- Results showed a high level of agreement (κ>0.85) among radiologists for most findings, except for one specific condition, indicating reliable evaluation of CT scans post-SBRT.
Article Abstract
Purpose: To evaluate the interobserver agreement of chest computed tomography (CT) findings in the diagnosis of expected changes and local recurrence after stereotactic body radiation therapy (SBRT) in patients with early-stage lung cancer or a single pulmonary metastasis.
Materials And Methods: A total of 54 patients with early-stage lung cancer or pulmonary metastasis who were treated with SBRT from 2007 to 2015 were included. The exclusion criteria were patients who presented with pulmonary infection during follow-up and patients who underwent a single CT during follow-up. The imaging features on CT were assessed by 3 blinded radiologists at the following 2 time points after SBRT: (a) early follow-up and (b) late follow-up (≥6 mo). The radiologists classified the findings as expected changes after SBRT or recurrence. Interobserver agreement was assessed by kappa and Wilcoxon statistics.
Results: A total of 13 women and 41 men with a mean age of 75.3 (±8.9) years were selected. The total and per fraction SBRT doses were 54 Gy (interquartile range: 45 to 54) and 18 Gy (interquartile range: 15 to 18), respectively. All expected changes and findings suggestive of recurrence had an almost perfect agreement (κ>0.85) among readers, except for diffuse consolidation in the early period (κ=0.65).
Conclusion: CT findings demonstrate high interobserver agreement for expected changes and for findings indicating recurrence after SBRT.
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| http://dx.doi.org/10.1097/RTI.0000000000000495 | DOI Listing |
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