Abstract
Radiotherapy is an indispensable treatment of lung cancer. However, movement of lung cancer brings challenges to precise radiotherapy. Four-dimensional cone-beam CT is a four-dimensional imaging technique, which can demonstrate the tumor trajectory to improve the accuracy of radiotherapy. In this article, the research status and development tendency of four-dimentional cone-beam CT in terms of measuring and correcting set-up errors, observing variability of tumor postion and movement, guiding delineation of target volumes as well as calculating radiation dose were retrospectively reviewed. Key words: Lung neoplasm/radiotherapy; Tomography, X-ray computed, cone beam; Progression
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