Abstract
In-room kV imaging is widely applied for intrafraction motion compensation in image-guided radiation therapy (IGRT). The low contrast of lung tumours in kV images and the overlap of high-intensity surrounding structures, such as the mediastinum, may limit the applicability of IGRT techniques in lung cancer treatments. The aim of this study is to apply a CT-based contrast enhancement method to improve markerless lung tumour tracking in kV images, thus enhancing the potential of X-raybased image guidance in lung cancer patients.
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