• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Physics of Medical Imaging pt.3; Progress in Biomedical Optics and Imaging; vol.7 no.28 >An approximate cone beam reconstruction algorithm for gantry-tilted CT
【24h】

An approximate cone beam reconstruction algorithm for gantry-tilted CT

机译：龙门倾斜CT的近似锥束重建算法

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

FDK algorithm has been known to be a popular 3D approximate computed tomography (CT) reconstruction algorithm. However, it may not provide satisfactory image quality for large cone angle. Recently, it has been improved by performing ramp filtering along the direction tangent to the helix, so to provide improved image quality for large cone angle. In this paper, we present a FDK type approximate reconstruction algorithm for gantry-tilted CT imaging. The proposed method improves FDK algorithm by filtering the projection data along a proper direction. Its filtering direction is determined by CT parameters and gantry-tilted angle. As a result, the proposed gantry-tilted reconstruction algorithm can provide more scanning flexibilities in clinical CT scanning and is efficient in computation. The performance of the proposed algorithm is evaluated with Turbell Clock phantom and Thorax phantom compared with gantry tilted FDK algorithm and a popular 2D approximate algorithm. The results show that our new algorithm can achieve better image quality than FDK algorithm and the 2D approximate algorithm for gantry-tilted CT image reconstruction.
机译：已知FDK算法是一种流行的3D近似计算机断层扫描（CT）重建算法。但是，对于大锥角，可能无法提供令人满意的图像质量。近来，已经通过沿着与螺旋相切的方向执行斜坡滤波来进行了改进，从而为大锥角提供了改进的图像质量。在本文中，我们提出了用于龙门倾斜式CT成像的FDK型近似重建算法。该方法通过沿正确方向对投影数据进行滤波来改进FDK算法。它的过滤方向由CT参数和机架倾斜角度确定。结果，提出的龙门倾斜重建算法可以在临床CT扫描中提供更多的扫描灵活性，并且计算效率高。与门架倾斜的FDK算法和流行的2D近似算法相比，使用Turbell Clock体模和Thorax体模评估了该算法的性能。结果表明，与龙门倾斜CT图像重建的FDK算法和二维近似算法相比，我们的新算法可以获得更好的图像质量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号