Initial Performance Characterization of a Clinical Noise-Suppressing Reconstruction Algorithm for MDCT
Initial Performance Characterization of a Clinical Noise-Suppressing Reconstruction Algorithm for MDCT
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DOI：
10.2214/ajr.11.6907
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发表时间：
2011-12-01
影响因子：
5
通讯作者：
Dobritz, Martin
中科院分区：
文献类型：
--
作者：
Noel, Peter B.;Fingerle, Alexander A.;Dobritz, Martin
OBJECTIVE. CT检查的数量相对急剧增加，因此相关人口的辐射剂量也随之增加。因此，需要具有剂量减少潜力的有效重建方法，其还保持图像质量。在这篇文章中，我们提出了这样的重建算法（iDose，飞利浦医疗）的初始性能评价。材料和方法。iDose是一种混合迭代重建算法，与当前临床标准重建相比，可提供增强的图像质量，同时降低辐射剂量。为了量化该算法在图像质量和剂量降低方面的优势，我们将iDose与传统的滤波反投影算法进行了比较。此外，我们还描述了iDose在多个图像质量指标方面的性能。结果。使用iDose时，HU值保持稳定。有了iDose，噪音大大降低。与标准重建相比，这反映在对比度噪声比和噪声功率谱的改善上。调制传递函数的测量结果证实，使用iDose时，空间分辨率没有下降。我们的结论是，iDose是一个重要的工具，在减少辐射剂量的CT。然而，应继续努力减少辐射剂量。
OBJECTIVE. The number of CT examinations is increasing relatively dramatically, hence the radiation dose of the associated population. Thus, there is a need for efficient reconstruction methods with dose reduction potential that also maintain the image quality. In this article, we present the initial performance evaluation of such a reconstruction algorithm (iDose, Philips Healthcare).MATERIALS AND METHODS. iDose is a hybrid iterative reconstruction algorithm that provides enhanced image quality while reducing the radiation dose compared with the current clinical standard reconstruction. To quantify the advantages of this algorithm in image quality and dose reduction, we compared iDose with the conventional filtered back projection algorithm. Furthermore, we describe the performance of iDose with respect to several image quality metrics.RESULTS. The HU values remain stable while employing iDose. With iDose, the noise is significantly reduced. This is reflected by an improvement in the contrast-to-noise ratio and in the noise power spectrum compared with a standard reconstruction. The measurements of the modulation transfer function confirm that, with iDose, there is no decline in spatial resolution.CONCLUSION. We conclude that iDose is an important tool in the reduction of radiation dose in CT. However, continuous efforts to reduce radiation dose should be pursued.