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. 2014 Feb 28;21(1):1–7. doi: 10.5761/atcs.oa.13-00318

Fig. 4.

Fig. 4

The correlation of thoracic surgeon’s impression and the results of fast Fourier transform (FFT) analysis. This cut-off line appeared to represent the thoracic surgeons impressions in our institute. Specificity was lower in thoracic surgeons than Cxi.