Abstract
Recently, region-setting CT has been studied as an ROI imaging method. This technique can obtain ROI image and strongly reduce the exposure dose by limiting the irradiation field. In this study, we developed three-dimensional region-setting CT and performed basic evaluations. The 6-channel collimators were controlled independently; it truncates projection data. Captured data were corrected using the mean pixel value of the valid data. The ROI image was reconstructed using the FDK algorithm. In the experiments, the image quality, shape reproducibility and exposure dose distribution were evaluated. These results indicate that proposed system may be useful for dose reduction in CT examination.
