首页> 外文会议>Visualization, Image-Guided Procedures pt.2; Progress in Biomedical Optics and Imaging; vol.8 no.28; Proceedings of SPIE-The International Society for Optical Engineering; vol.6509 pt.2 >Hardware accelerated ray cast of volume data and volume gradient for an optimized splines-based multi-resolution 2D-3D registration
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Hardware accelerated ray cast of volume data and volume gradient for an optimized splines-based multi-resolution 2D-3D registration

机译:体积数据和体积梯度的硬件加速射线投射,用于基于样条的优化多分辨率2D-3D配准

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摘要

This paper describes a method for DRR generation as well as for volume gradients projection using hardware accelerated 2D texture mapping and accumulation buffering and demonstrates its application in 2D-3D registration of X-ray fluoroscopy to CT images. The robustness of the present registration scheme are guaranteed by taking advantage of a coarse-to-fine processing of the volume/image pyramids based on cubic B-splines. A human cadaveric spine specimen together with its ground truth was used to compare the present scheme with a purely software-based scheme in three aspects: accuracy, speed, and capture ranges. Our experiments revealed an equivalent accuracy and capture ranges but with much shorter registration time with the present scheme. More specifically, the results showed 0.8 mm average target registration error, 55 second average execution time per registration, and 10 mm and 10° capture ranges for the present scheme when tested on a 3.0 GHz Pentium 4 computer.
机译:本文介绍了一种使用硬件加速的2D纹理映射和累积缓冲生成DRR以及进行体积梯度投影的方法,并展示了其在X射线荧光透视法对CT图像的2D-3D配准中的应用。通过利用基于三次B样条的体积/图像金字塔的粗到精处理,可以保证本配准方案的鲁棒性。使用人体尸体脊柱标本及其基本事实在三个方面对本方案与基于纯软件的方案进行了比较:准确性,速度和捕获范围。我们的实验揭示了相同的精度和捕获范围,但本方案的注册时间要短得多。更具体地说,结果显示,在3.0 GHz Pentium 4计算机上进行测试时,本方案的平均目标配准误差为0.8 mm,每次配准的平均执行时间为55秒,捕获范围为10 mm和10°。

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