Abstract
An excessive volume of normal tissues may be irradiated due to respiratory displacement in current standard radiation therapy of lung cancer. If motion of the lung can be predicted using biomechanical simulation, tumor tissues can be irradiated more accurately and precisely. A two-dimensional lung model is created from exhalation Computed Tomography (CT) images using image processing techniques. Lung deformation is modeled as an elastic material and simulated by a particle method. Influence of thoracic breathing and heartbeat are given as the boundary condition. The calculation results are compared with those of 4DCT data to evaluate calculation accuracy quantitatively.
