iDose4迭代重建技术在胸部CT扫描中最佳方案的探讨

发布时间：2018-05-15 01:25

本文选题：迭代重建技术 + 胸部　；参考：《山东医药》2015年09期

【摘要】：目的探讨i Dose4迭代重建技术在胸部CT扫描中的最佳电流强度。方法收集行256层螺旋CT胸部扫描的患者135例,随机分为5组,A、B、C、D组各30例,E组15例。其中A组为对照组,行常规剂量100 m As扫描,用传统的滤过反透射法重建,其余各组依次分别为75、50、30、15 m As进行扫描,并在i Dose4-5水平重建图像,对5组图像进行主观评价和客观评价。结果在i Dose4-5水平下,随着电流强度的降低,有效剂量逐渐减小,图像噪声值逐渐增大,B、C、D、E组有效剂量较A组分别减少约27.74%、51.82%、77.01%和83.94%,B、C、D组图像质量评分与A组比较无统计学差异(P均0.05),E组图像质量与A组比较有统计学差异(P0.05)。结论在i Dose4-5水平,电流强度降低至30 m As可以明显减低辐射剂量,且图像质量不受影响,可以作为胸部低剂量扫描的最佳方案。
[Abstract]:Objective to study the optimal current intensity of I Dose4 iterative reconstruction technique in chest CT scan. Methods 135 patients with 256-slice spiral CT were randomly divided into 5 groups: group D (30 cases) and group E (15 cases). Group A was used as the control group. The conventional dose 100m as scan was performed and reconstructed by the traditional filter reverse transmission method. The rest groups were scanned with 7550 mAs and 3015mAs, respectively, and the images were reconstructed at the level of I Dose4-5. Five groups of images were evaluated subjectively and objectively. Results at the I Dose4-5 level, the effective dose decreased with the decrease of the current intensity. The image noise value gradually increased. The effective dose in group E was decreased by 27.74% than that in group A (51.82% and 83.94% respectively). There was no significant difference in image quality between group A and group A (P < 0.05). There was significant difference in image quality between group E and group A (P < 0.05). Conclusion at the I Dose4-5 level, the reduction of the current intensity to 30 Mas can significantly reduce the radiation dose, and the image quality is not affected, so it can be regarded as the best scheme for low dose chest scanning.
【作者单位】：佳木斯大学附属第一医院;
【基金】：佳木斯大学研究生科技创新项目(LZR2014_020) 佳木斯大学科研项目(S2013-045)
【分类号】：R816.41

【相似文献】