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首页> 外文会议>Physics of Medical Imaging pt.3; Progress in Biomedical Optics and Imaging; vol.7 no.28 >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算法的球面探测器在锥形束CT中的图像重建

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摘要

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：平板探测器和圆柱探测器都已在CT系统中用于数据采集。圆柱形检测器通常比平板检测器更均匀地提供横向像平面的采样。但是，在纵向尺寸上，圆柱形和平板探测器提供了类似的图像空间采样。在这项工作中，我们研究了一个球形检测器，由于每个检测器箱对向的立体角保持不变，因此可以对3D图像空间进行均匀采样。我们已经扩展了先前为锥形束CT开发的反投影过滤（BPF）算法，以使用球面检测器重建锥形束CT中的图像。我们还将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，通过使用扩展的BPF锥束算法，可以从球形探测器获取的数据中获得准确的图像。

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