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This paper proposes a three-dimensional (3-D) phase correlation-based rigid volume registration method for estimation of the lung tumor motion in four-dimensional (4-D) computed tomography (CT). In the lung cancer radiotherapy treatment, the 4-D thorax CT has been used to observe the spatiotemporal tumor motion with the patient's respiration. In the proposed method, the respiration-induced lung tumor...
This paper presents an efficient method of subpixel image registration based on the phase-only correlations (POCs) of image projections. Conventional POC-based methods need the two-dimensional discrete Fourier transforms three-times for calculating the 2-D POC of images. In order to reduce the computational cost caused by the two-dimensional discrete Fourier transforms, we decompose the two-dimensional...
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