Abstract
Lung nodule segmentation is an essential step in any CAD system for lung cancer detection and diagnosis. Traditional approaches for image segmentation are mainly morphology based or intensity based. Motion-based segmentation techniques tend to use the temporal information along with the morphology and intensity information to perform segmentation of regions of interest in videos. CT scans comprise of a sequence of dicom 2-D image slices similar to videos which also comprise of a sequence of image frames ordered on a timeline. In this work, Farneback, Horn-Schunck and Lucas-Kanade optical flow methods have been used for processing the dicom slices. The novelty of this work lies in the usage of optical flow methods, generally used in motion-based segmentation tasks, for the segmentation of nodules from CT images. Since thin-sliced CT scans are the imaging modality considered, they closely approximate the motion videos and are the primary motivation for using optical flow for lung nodule segmentation. This paper also provides a detailed comparative analysis and validates the effectiveness of using optical flow methods for segmentation. Finally, we propose methods to further improve the efficiency of segmentation using optical flow methods on CT scans.
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Acknowledgements
This work was carried out at ABV-IIITM Gwalior, India with funding from DST, Govt. of India. The File Number is SR/WOSA/ET-153/2017
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Suji, R.J., Bhadouria, S.S., Dhar, J. et al. Optical Flow Methods for Lung Nodule Segmentation on LIDC-IDRI Images. J Digit Imaging 33, 1306–1324 (2020). https://doi.org/10.1007/s10278-020-00346-w
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DOI: https://doi.org/10.1007/s10278-020-00346-w