A new Active Contour Model (ACM) algorithm for the detection of the contour of bi-dimensional regions is presented. The algorithm is based on the simulation of an elastic band glued to the contour of the region under analysis. As a result a local convex hull is obtained, where the radius of the concave regions included by the elastic band is defined by properly tuning a parameter A dedicated application to medical images is presented. The algorithm is part of a segmentation system able to extract the lung volume from 3D CT scans. The effectiveness of the algorithm is evaluated on a database of 15 low-dose CT scans (about 320 sectional images per CT), including 26 nodules. No pathological structure is missing after the lung volume segmentation, while a reduction of the volume to analyze is obtained to about 15% of the total volume of the original CT scan, and 25% of the chest volume.
|Autori interni:||CASTELLANO, Marcello|
|Titolo:||A novel Active Contour Model algorithm for contour detection in complex objects|
|Data di pubblicazione:||2007|
|Nome del convegno:||IEEE International Conference on Computational Intelligence for Measurement Systems and Applications, CIMSA 2007|
|Digital Object Identifier (DOI):||10.1109/CIMSA.2007.4362537|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|