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Visualization of 3D Volumetric Lung Dynamics for Real-Time External Beam Lung Radiotherapy
Anand P. Santhanam, Harini Neelakkantan, Yugang Min, Nicolene Papp, Akash Bhargava, Kevin Erhart, Xiang Long, Rebecca Mitchell, Eduardo Divo, Alain Kassab, Olusegun Ilegbusi, Bari H. Ruddy, Jannick P. Rolland, Sanford L. Meeks, Patrick A. Kupelian
This paper reports on the usage of physics-based 3D volumetric lung dynamic models for visualizing and monitoring the radiation dose deposited on the lung of a human subject during lung radiotherapy. The dynamic model of each subject is computed from a 4D Computed Tomography (4DCT) imaging acquired before the treatment. The 3D lung deformation and the radiation dose deposited are computed using Graphics Processing Units (GPU). Additionally, using the dynamic lung model, the airflow inside the lungs during the treatment is also investigated. Results show the radiation dose deposited on the lung tumor as well as the surrounding tissues, the combination of which is patient-specific and varies from one treatment fraction to another.
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