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Figure 3 | BioMedical Engineering OnLine

Figure 3

From: Automated system for lung nodules classification based on wavelet feature descriptor and support vector machine

Figure 3

Extraction of the ROI in a CT image: a) Original CT image and b) CT image after extraction of the ROI. The images were obtained from two different public databases and different scanners were used for acquisition. Different forms and views can be observed. The extraction of the ROI is performed in order to eliminate the differences between images and to standardize all the CT scans. The final form is highlighted with a dashed red circle.

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