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KMID : 0357520220450020117
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Journal of Radiological Science and Technology
2022 Volume.45 No. 2 p.117 ~ p.125
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Image Quality Evaluation according to X-ray Source Arrangement Type and the Number of Projections in a s-IGDT System
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Lee Da-Hye
Nam Ki-Bok
Lee Seung-Wan
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Abstract
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Although stationary inverse-geometry digital tomosynthesis (s-IGDT) is able to reduce motion artifacts, image acquisition time and radiation dose, the image quality of the s-IGDT is degraded due to the truncations arisen in projections.
Therefore, the effects of geometric and image acquisition conditions in the s-IGDT should be analyzed for improving the image quality and clinical applicability of the s-IGDT system. In this study, the s-IGDT images were obtained with the various X-ray source arrangement types and the various number of projections. The resolution and noise characteristics of the obtained s-IGDT images were evaluated, and the characteristics were compared with those of the conventional DT images.
The s-IGDT system using linear X-ray source arrangement and 40 projections maximized the image characteristics of resolution and noise, and the corresponding system was superior to the conventional DT system in terms of image resolution.
In conclusion, we expect that the s-IGDT system can be used for providing medical images in diagnosis.
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KEYWORD
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s-IGDT, X-ray source arrangement, Number of projections, Resolution, Noise
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