Evaluation of image noise in fan-beam x-ray computed tomography.
Evaluation of image noise in fan-beam x-ray computed tomography.
复制标题
扇束 X 射线计算机断层扫描中图像噪声的评估。
DOI：
10.1109/iembs.2008.4649762
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Noo,Frédéric
中科院分区：
文献类型：
--
作者：
Wunderlich,Adam;Noo,Frédéric
We investigate the problem of evaluating noise in computed tomography images that are reconstructed from x-ray measurements collected in fan-beam geometry. For reconstruction, we use the classical direct filtered backprojection method, which acts directly on the fan-beam projections without rebinning to the parallel-beam geometry. In this context, we present an accurate and efficient method to evaluate the image noise. This method is first validated using results from Monte-Carlo simulations. Then, we illustrate its advantages through the implementation of a channelized Hotelling observer for a lesion detection task.
