迭代算法低剂量CT诊断腰椎间盘突出

发布时间：2018-05-13 11:46

  本文选题：体层摄影术 + X线计算机　； 参考：《中国医学影像技术》2017年03期

【摘要】：目的评价迭代算法(AIDR 3D)和滤波反投影算法(FBP)联合低剂量CT扫描评估腰椎间盘突出的价值。方法将150例患者随机分为A~E 5组,每组30例,A~D组扫描管电压为120kV,管电流分别为100mAs、50 mAs、30mAs、20mAs,E组管电压为80kV、管电流为100mAs。对每组图像分别进行AIDR 3D和FBP重建,比较不同重建方法各组图像的噪声、SNR及CNR。并采用3分法对图像质量进行主观评分,评分≥2为诊断可接受图像质量,比较各组图像椎间盘突出的显示能力。结果在不同扫描条件下,采用AIDR 3D重建的图像噪声、SNR、CNR及椎间盘突出的显示情况方面均优于FBP。同一重建技术条件下,随辐射剂量减低,噪声升高、SNR和椎间盘突出显示能力降低;除采用AIDR 3D的50mAs组CNR略低于30mAs组外,其余各组随剂量减低,CNR降低;同一剂量下两种重建技术采用降低管电流得到的图像质量优于降低管电压的方式。结论采用AIDR 3D重建方法联合低剂量CT扫描诊断椎间盘突出有一定的价值。
[Abstract]:Objective to evaluate the value of iterative algorithm (AIDR 3D) and filter backprojection (FBP) combined with low dose CT scan in the evaluation of lumbar disc herniation. Methods 150 patients were randomly divided into two groups. The voltage of scanning tube was 120kV, the current of the tube was 100mAs50mAs-30mAs-20mAs-E group was 80kV and the current was 100mAs. Each group of images were reconstructed with AIDR 3D and FBP respectively. Three points method was used to evaluate the image quality. The score 鈮，

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