迭代模型重建技术在低剂量胸部CT双期增强扫描中的可行性
发布时间：2019-06-20 17:43
【摘要】：目的探讨低剂量扫描联合迭代模型重建技术在胸部CT双期增强检查中的可行性。方法 130例拟诊为肺部占位的患者接受胸部双期增强扫描,随机分为A组和B组,每组65例。A组扫描采用管电压100kV,自动管电流调制技术,图像质量指数10;B组管电压80kV,自动管电流调制技术,图像质量指数8。A组图像采用混合迭代重建技术(iDose~4)重建,B组图像采用迭代模型重建技术(IMR)重建。比较两组图像肺动脉(PA)期及支气管动脉(BA)期的客观图像质量、主观图像质量和血管显示优良率并计算辐射剂量。结果 A组有效辐射剂量为(3.30±0.89)mSv,B组为(1.27±0.19)mSv,B组较A组下降61.52%(P0.001)。PA期和BA期,B组图像噪声显著低于A组,CNR显著高于A组(P均0.001);两组肺窗和纵隔窗主观图像质量均达到较高评分,双期血管显示优良率均较高,差异无统计学意义(P均0.05)。结论采用迭代模型重建技术,低剂量胸部双期增强扫描可在较常规剂量降低61.52%的条件下,保证图像质量并满足诊断要求。
[Abstract]:Objective To study the feasibility of low-dose scanning combined iterative model reconstruction technique in the double-stage enhancement of chest CT. Methods 130 patients who were to be diagnosed as lung occupying were randomly divided into group A and group B, with 65 cases in each group. A group of images with a tube voltage of 100 kV, an automatic tube current modulation technique, an image quality index of 10, a B-group tube voltage of 80 kV, an automatic tube current modulation technique, an image quality index 8.A group image is reconstructed by a hybrid iterative reconstruction technique (iDse-4), The B-group image is reconstructed using an iterative model reconstruction technique (IMR). Objective To compare the objective image quality, subjective image quality and blood vessel display rate of the two groups of image pulmonary artery (PA) and bronchial artery (BA), and to calculate the radiation dose. Results The effective radiation dose of group A was (3.30-0.89) mSv, group B (1.27-0.19) mSv, group B decreased by 61.52% (P 0.001). The image noise in group B and group B was significantly lower than that in group A (P <0.001), and the subjective image quality of both groups of lung and mediastinum was higher. The rate of good and good rate of two-stage blood vessels was higher and the difference was not significant (P <0.05). Conclusion Using the iterative model reconstruction technique, the low-dose chest two-stage enhanced scan can ensure the image quality and meet the diagnostic requirements under the condition that the conventional dose is reduced by 61.52%.
【作者单位】： 南京医科大学附属苏州医院影像科;飞利浦医疗保健临床科研部;
【分类号】：R816.41
，
本文编号：2503405
[Abstract]:Objective To study the feasibility of low-dose scanning combined iterative model reconstruction technique in the double-stage enhancement of chest CT. Methods 130 patients who were to be diagnosed as lung occupying were randomly divided into group A and group B, with 65 cases in each group. A group of images with a tube voltage of 100 kV, an automatic tube current modulation technique, an image quality index of 10, a B-group tube voltage of 80 kV, an automatic tube current modulation technique, an image quality index 8.A group image is reconstructed by a hybrid iterative reconstruction technique (iDse-4), The B-group image is reconstructed using an iterative model reconstruction technique (IMR). Objective To compare the objective image quality, subjective image quality and blood vessel display rate of the two groups of image pulmonary artery (PA) and bronchial artery (BA), and to calculate the radiation dose. Results The effective radiation dose of group A was (3.30-0.89) mSv, group B (1.27-0.19) mSv, group B decreased by 61.52% (P 0.001). The image noise in group B and group B was significantly lower than that in group A (P <0.001), and the subjective image quality of both groups of lung and mediastinum was higher. The rate of good and good rate of two-stage blood vessels was higher and the difference was not significant (P <0.05). Conclusion Using the iterative model reconstruction technique, the low-dose chest two-stage enhanced scan can ensure the image quality and meet the diagnostic requirements under the condition that the conventional dose is reduced by 61.52%.
【作者单位】： 南京医科大学附属苏州医院影像科;飞利浦医疗保健临床科研部;
【分类号】：R816.41
，
本文编号：2503405
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