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Endoscopic view of a polyp of 5 mm size: (a) from the result after noise reduction by the Hanning filter; (b) from the result after the KL-PWLS sinogram restoration. The arrows indicate the position of the polyp. The green line is the central line for guided navigation inside the colon lumen, which is provided by the VC software and facilitates the navigation procedure. Both pictures show the most visually-appealing views.
