4D MDCT 4D CBCT METHOD AND APPARATUS FOR TUMOR TRACKING DURING RADIATION TREATMENT USING IMAGE REGISTRATION AND TUMOR MATCHING BETWEEN PLANNING 4D MDCT AND TREATMENT 4D CBCT

摘要

4D MDCT images for treatment planning and 4D CBCT images obtained during treatment according to one embodiment of the present invention are used for (a) 4D (4D) Generating a tumor motion model for each phase image from an MDCT (Multi-Detector Computed Tomography) image; (B) performing the image matching between the 4D MDCT image and the 4-dimensional Cone Beam Computed Tomography (CBCT) image acquired during the treatment to correct the tumor motion model and the 4D MDCT image, Estimating a global movement of the tumor present in the lung by compensating for the movement of the lung between the 4D CBCT images acquired during the treatment; And (c) performing a template matching between each phase image of the corrected 4D MDCT image and a corresponding phase image of the 4D CBCT image to determine the localization and location of the tumor in the 4D CBCT image, The step of predicting can accurately and accurately track the motion of the actual tumor.;