Detection of Pulmonary Nodules in Low-dose Computed Tomography Using Localized Active Contours and Shape Features.

Background: Pulmonary nodules are symptoms of lung cancer. The shape and size of these nodules are used to diagnose lung cancer in computed tomography (CT) images. In the early stages, nodules are very small, and radiologist has to refer to many CT images to diagnose the disease, causing operator mistakes.