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A Fast DRR Generation Scheme for 3D-2D Image Registration Based on the Block Projection Method

机译：基于块投影法的3D-2D图像配准快速DRR生成方案

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摘要

In three-dimensional to two-dimensional (3D-2D) image registration, DRR (digitally reconstructed radiograph) generation is often a bottleneck in computation. In this article, a novel fast DRR generation scheme is proposed based on the recently introduced Block Projection method and Slab algorithm that reuse building blocks of DRRs previously generated for known poses. The scheme is flexible as exemplified in pose grid design and slab binding, and upper bounds in projection error exist and can be estimated. Experiments were conducted to evaluate DRR quality and sensitivity to pose difference, computing time and error bounds were reported. The results showed that on a conventional computer the proposed scheme generated high quality, pose-preserving DRRs of size 512×512 in 6 ms with slab binding, demonstrating its potential to be a viable solution to fast, high quality DRR generation for 3D-2D image registration.
机译：在三维到二维（3D-2D）图像配准中，DRR（数字重建射线照片）生成通常是计算的瓶颈。在本文中，基于最近引入的块投影方法和Slab算法，提出了一种新颖的快速DRR生成方案，该方案可重复使用先前为已知姿势生成的DRR的构建块。该方案是灵活的，如在姿势网格设计和平板绑定中所举例说明的那样，并且存在投影误差的上限并且可以对其进行估计。进行了实验以评估DRR质量和姿势差异的敏感性，并报告了计算时间和误差范围。结果表明，在常规计算机上，所提方案通过平板结合在6毫秒内生成了512×512大小的高质量，保持姿势的DRR，证明了其成为3D-2D快速，高质量DRR生成的可行解决方案的潜力。图像配准。

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