Research on ultra low-dose next-generation computed tomography

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Recent developments in CT technology enabled generating high-quality 3-D and 4-D images. However, necessary patient dose per each CT examination is increasing very much. In this research, we investigated fundamentals and applications of ultra low-dose new-generation CT based on the following two principles. The first principle is called interior CT, in which x-rays are radiated only to small region-of-interests such as heart or breast. The second principle is called sparse-view CT, in which only a limited number of projections are measured. Consequently, we established fundamentals of the next-generation CT and demonstrated their feasibilities.