ディジタルX線テレビによるディジタル同時多層断層の試み

概要

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The use of digital simultaneous multi-plane tomography with digital x-ray TV provided highly precise and informative tomograms with minimal burden on the patient. Compared with helical CT, the method offered a much lower exposure dose and shorter examination time. In this method, first the projection data were collected, and then the tomograms were reconstructed. Arbitrary planes of the tomogram were, therefore, obtainable from single-acquisition data. Multiple tomograms without gaps between each plane were also obtained from the projection data. During reconstruction of the tomogram, the various causes of image distortion were corrected using data obtained with the specially designed calibration phantom. Images of hip joint, mandible, and larynx have been obtained so far, and images were of high quality. Exposure dose to the patients was less than that of conventional analog tomography. Various images were obtainable with image processing. For example, a curved surface image could be reconstructed for fitting the curvature of the mandible. The reconstructed tomograms were able to be displayed in various forms, including maximum intensity projection.
社団法人日本放射線技術学会の論文
2001-07-20