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首页> 外文会议>Conference on Medical Imaging: Physics of Medical Imaging >Image reconstruction in cone-beam CT with a spherical detector using the BPF algorithm
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Image reconstruction in cone-beam CT with a spherical detector using the BPF algorithm

机译：使用BPF算法与球形检测器的锥形梁CT的图像重建

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Both flat-panel detectors and cylindrical detectors have been used in CT systems for data acquisition. The cylindrical detector generally offers a sampling of a transverse image plane more uniformly than does a flat-panel detector. However, in the longitudinal dimension, the cylindrical and flat-panel detectors offer similar sampling of the image space. In this work, we investigate a detector of spherical shape, which can yield uniform sampling of the 3D image space because the solid angle subtended by each individual detector bin remains unchanged. We have extended the backprojection-filtration (BPF) algorithm, which we have developed previously for cone-beam CT, to reconstruct images in cone-beam CT with a spherical detector. We also conduct computer-simulation studies to validate the extended BPF algorithm. Quantitative results in these numerical studies indicate that accurate images can be obtained from data acquired with a spherical detector by use of our extended BPF cone-beam algorithms.
机译：平板探测器和圆柱形检测器都已用于CT系统进行数据采集。圆柱形检测器通常提供比平板检测器更均匀的横向图像平面的采样。然而，在纵向尺寸中，圆柱形和平板探测器提供类似的图像空间采样。在这项工作中，我们研究了球形的探测器，其可以产生3D图像空间的均匀采样，因为每个单独的检测器箱子的固体角度保持不变。我们扩展了我们以前开发的用于锥梁CT的反射过滤（BPF）算法，以通过球面检测器重建锥形束CT中的图像。我们还进行计算机仿真研究以验证扩展的BPF算法。这些数值研究中的定量结果表明，通过使用我们的扩展BPF锥形梁算法，可以从用球面检测器获取的数据获得准确的图像。

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