胸部能谱成像与常规CT扫描辐射剂量与图像质量对比研究

发布时间：2018-04-11 06:44

本文选题：能谱成像 + 常规CT　；参考：《东南大学学报(医学版)》2017年05期

【摘要】：目的:探究胸部能谱成像与常规胸部CT扫描的辐射剂量及图像质量有无差异。方法:前瞻性对33例因临床诊断及疑诊肺癌的成年患者行胸部CT平扫与增强,增强时用能谱成像扫描,平扫及增强均通过胸部不同平面的脂肪组织、肌肉组织进行客观评价图像噪声、主观评分,并记录辐射剂量。采用独立样本T检验比较二者扫描方式的辐射剂量、不同平面70 kev单能量图像与常规扫描混合能量客观指标及主观评分。结果:能谱扫描和常规扫描的CT剂量指数、有效剂量差异无统计意义(P0.05)。能谱扫描70 kev单能量的三个不同平面水平的脂肪组织、肌肉组织噪声及图像质量的主观评分对应常规混合能量扫描差异均无统计学意义(P0.05)。结论:胸部CT能谱扫描与常规扫描的射线剂量相当;70 ke V单能量图像的噪声低于常规扫描的FBP重建图像,可在临床中常规开展应用。
[Abstract]:Objective: to investigate the difference of radiation dose and image quality between energy dispersive chest imaging and conventional chest CT scan.Methods: 33 adult patients with suspected lung cancer were included in this study. Chest CT plain scan and enhancement were performed in 33 patients with lung cancer.Muscle tissue was evaluated objectively for image noise, subjective score, and radiation dose was recorded.Independent sample T test was used to compare the radiation dose of the two scanning modes, objective indexes and subjective scores of mixed energy of 70 kev single energy images with different planes and conventional scans.Results: there was no significant difference in effective dose index between energy spectrum scan and conventional scan (P 0.05).There were no significant differences in three different plane levels of adipose tissue at 70 kev single energy level, muscle noise and image quality as compared with conventional mixed energy scan (P 0.05).Conclusion: the radiation dose of energy spectrum scan of chest CT is equal to that of conventional scan. The noise of single energy image of 70ke V is lower than that of FBP reconstruction image of conventional scan, so it can be used in clinical practice.
【作者单位】：东南大学附属中大医院影像科;
【分类号】：R816.4

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