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首页> 外文期刊>Physics in medicine and biology. >Towards an inline reconstruction architecture for micro-CT systems.
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Towards an inline reconstruction architecture for micro-CT systems.

机译：迈向微型CT系统的在线重建架构。

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摘要

Recent developments in micro-CT have revolutionized the ability to examine in vivo living experimental animal models such as mouse with a spatial resolution less than 50 microm. The main requirements of in vivo imaging for biological researchers are a good spatial resolution, a low dose induced to the animal during the full examination and a reduced acquisition and reconstruction time for screening purposes. We introduce inline acquisition and reconstruction architecture to obtain in real time the 3D attenuation map of the animal fulfilling the three previous requirements. The micro-CT system is based on commercially available x-ray detector and micro-focus x-ray source. The reconstruction architecture is based on a cluster of PCs where a dedicated communication scheme combining serial and parallel treatments is implemented. In order to obtain high performance transmission rate between the detector and the reconstruction architecture, a dedicated data acquisition system is also developed. With the proposed solution, the time required to filter and backproject a projection of 2048 x 2048 pixels inside a volume of 140 mega voxels using the Feldkamp algorithm is similar to 500 ms, the time needed to acquire the same projection.
机译：微型CT的最新发展彻底改变了检查体内活体实验动物模型（例如空间分辨率小于50微米的小鼠）的能力。对生物学研究人员而言，体内成像的主要要求是良好的空间分辨率，在全面检查过程中对动物诱导的低剂量以及减少用于筛选目的的采集和重建时间。我们引入内联采集和重建架构，以实时获取满足上述三个要求的动物的3D衰减图。微型CT系统基于市售的X射线检测器和微焦点X射线源。重建架构基于PC机集群，其中实现了将串行和并行处理相结合的专用通信方案。为了获得检测器与重建架构之间的高性能传输速率，还开发了专用的数据采集系统。使用提出的解决方案，使用Feldkamp算法在140兆体素的体积内对2048 x 2048像素的投影进行滤波和反投影所需的时间类似于500 ms，即获取相同投影所需的时间。

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