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首页> 外文期刊>Journal of Medical Imaging and Health Informatics >Three-Dimensional (3D) Image Reconstruction in a Truncated Archimedean-Spiral Scan Geometry Based on the Compressed-Sensing (CS) Theory: Simulation Study
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Three-Dimensional (3D) Image Reconstruction in a Truncated Archimedean-Spiral Scan Geometry Based on the Compressed-Sensing (CS) Theory: Simulation Study

机译：基于压缩传感（CS）理论的截断阿基米德螺旋扫描几何中的三维（3D）图像重建：仿真研究

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摘要

In this work, a feasibility study was performed on the three-dimensional (3D) reconstruction in a truncated Archimedean-spiral geometry with a narrow detector (e.g., 90 x 392 pixels) for application to high-accurate, cost-effective dental X-ray imaging. Here an X-ray tube and a narrow detector rotate together around the rotational axis several times and, concurrently, the detector moves horizontally in the detector coordinate to cover the whole imaging volume during the projection data acquisition. A compressed-sensing (CS) based algorithm, rather than a common filtered-backprojection (FBP), was employed for more accurate image reconstruction. A systematic simulation was performed to demonstrate the viability of the proposed approach to volumetric dental X-ray imaging and the image characteristics was investigated in terms of the image value profile, the universal-quality index (UQI), and the contrast-to-noise ratio (CNR). The 3D images of considerably high accuracy were successfully reconstructed by using the proposed method and thus it was expected to be applicable to developing a cost-effective, two-in-one dental imaging system that combines the panoramic and computed tomography features.
机译：在这项工作中，我们使用狭窄的检测器（例如90 x 392像素）对截短的阿基米德螺旋形几何图形中的三维（3D）重建进行了可行性研究，以应用于高精度，经济高效的牙科X-射线成像。在此，X射线管和一个狭窄的探测器围绕旋转轴一起旋转数次，并且同时，探测器在探测器坐标中水平移动，以覆盖投影数据采集期间的整个成像体积。基于压缩传感（CS）的算法，而不是普通的滤波反投影（FBP），用于更准确的图像重建。进行了系统仿真，以证明所提出的方法在容积式牙科X射线成像中的可行性，并根据图像值轮廓，通用质量指数（UQI）和对比噪声对图像特征进行了研究。比（CNR）。通过使用所提出的方法成功地重建了精度很高的3D图像，因此有望将其应用于开发结合了全景和计算机断层扫描功能的经济高效的二合一牙科成像系统。

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