title: 4D lung tumor segmentation via shape prior and motion cues.
abstract: Lung tumor segmentation is important for therapy in the radiation treatment of patients with thoracic malignancies. In this paper, we describe a 4D image segmentation method based on graph-cuts optimization, shape prior and optical flow. Due to small size, the location, and low contrast between the tumor and the surrounding tissue, tumor segmentation in 3D+t is challenging. We performed 4D lung tumor segmentation in 5 patients, and in each case compared the results with the expert-delineated lung nodules. In each case, 4D image segmentation took approximately ten minutes on a PC with AMD Phenom II and 32GB of memory for segmenting tumor in five phases of lung CT data.
authors.lastname: Jung Won Cha
authors.forename: Mohammad M
authors.initials: MM
authors.lastname: Farhangi
authors.forename: Neal
authors.initials: N
authors.lastname: Dunlap
authors.forename: Amir
authors.initials: A
authors.lastname: Amini
mesh_terms: D000465:Algorithms; D003463:Cues; D056973:Four-Dimensional Computed Tomography; D006801:Humans; D008175:Lung Neoplasms; D009038:Motion