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4D MDCT IMAGES FOR TREATMENT PLAN, METHOD AND APPARATUS FOR TRACKING TUMOR MOVEMENT IN RADIATION THERAPY USING IMAGE MATCHING BETWEEN 4D CBCT IMAGES DURING TREATMENT AND TUMOR MATCHING
4D MDCT IMAGES FOR TREATMENT PLAN, METHOD AND APPARATUS FOR TRACKING TUMOR MOVEMENT IN RADIATION THERAPY USING IMAGE MATCHING BETWEEN 4D CBCT IMAGES DURING TREATMENT AND TUMOR MATCHING
4D MDCT images for a treatment plan, a method and apparatus for tracking tumor movement in a radiation therapy using image matching between 4D CBCT images during treatment and tumor matching according to one embodiment of the present invention comprises the steps of: (a) generating a tumor movement model for each phase image from a four-dimensional (4D) multi-detector computed tomography (MDCT) image for a treatment plan; (b) performing image matching between the 4D MDCT image and a 4-dimensional Cone Beam Computed Tomography (CBCT) image acquired during the treatment so as to Compensate movement of the lung between the tumor movement model and the 4D CBCT image acquired during the treatment by correcting the tumor movement model and the 4D MDCT image, thereby predicting global movement of a tumor present in the lung; (c) performing template matching between each phase image of the corrected 4D MDCT image and a corresponding phase image of the 4D CBCT image so as to determine the location and region of the tumor in the 4D CBCT image, thereby predicting a regional movement of the tumor. According to the present invention, it is possible to track the actual movement of the tumor effectively and accurately.;COPYRIGHT KIPO 2017
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