| 许美玲 赵彦明 刘白鹭△ 张金玲 王海波.256 层CT 冠状动脉造影低剂量技术联合应用的临床价值[J].,2016,16(5):876-880 |
| 256 层CT 冠状动脉造影低剂量技术联合应用的临床价值 |
| Clinical Value of Low-dose Coronary Angiography in 256-Slice CT |
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| DOI： |
| 中文关键词: 256 层CT 冠状动脉成像 低剂量 前门控 迭代重建 |
| 英文关键词: Coronary angiography 256-slice computed tomography Prospective ECG- triggered axial Scan Effective radiationdose Iterative reconstruction algorithm |
| 基金项目:黑龙江省教育厅科学技术研究项目（12531388） |
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| 中文摘要: |
| 目的：探讨前瞻性心电门控扫描、低管电压结合迭代重建算法在256 层螺旋CT 冠脉造影中的应用价值。方法：回顾性分析
行256 层螺旋CT 冠状动脉成像(CCTA)、体质量指数正常的受检者130 例。常规剂量组(A 组)50 例：应用回顾性心电门控扫描模
式，管电压120 kv；低剂量组(B 组)80 例，心率<70 次/分者50 例，心率≧70 次/ 分者30例：应用前瞻性心电门控扫描模式，管电
压100 kv。B 组患者原始数据分别应用迭代算法(Idose3)重建及标准滤波反投影法(FBP)重建。比较A、B 两组的有效辐射剂量，对
各组客观图像质量及主观图像质量进行统计学分析。结果：A、B两组平均有效辐射剂量分别为(15.34± 3.89)、(1.43± 0.12)mSv。B
组患者应用迭代重建图像噪声降低，差异有统计学意义(P<0.05)。应用FBP重建，B组图像噪声高于A组，两者比较差异有统计学
意义(P<0.05)。各组主观图像质量评分差异无统计学意义(P>0.05)。结论：前瞻性心电门控低千伏扫描模式联合迭代重建算法在提
供满足诊断的冠状动脉CTA图像的同时，辐射剂量降幅高达90.6%。心率70 次/ 分-85 次/分的患者也可行256 层CT 前门控扫
描，降低管电压造成的图像噪声增加可以通过迭代重建弥补。 |
| 英文摘要: |
| Objective:This article is to discuss the clinical application value by analyzing the radiation doses and image quality of
various lowdose technologies in coronary angiography. The aimis to explore the value of prospective ECG-gating scanning protocol, low
tube voltage combined with iterative reconstruction algorithm.Methods:We Collected 130 cases of patients who had completed coronary
aigiography using 256-slice scanners, these patients was divided into two groups,respectively named as group A (patients used retrospective
ECG-gating scanning mode, tube voltage 120 kv), groupB (patients used prospective ECG-gating scanning mode, tube voltage 100
kv).Group B with raw data were reconstructed with iterative-Idose reconstruction Algorithmand standard reconstruction called filter back
projection algorithm, compare the radiation dose, objective image quality and subjective image quality of two group.Results:It were
found that the mean effective radiation doses of group A is (15.34 ± 3.89) mSv, group B (1.43± 0.12) mSv.No statistically significant
differences in subjective image quality assessments were observed between two scanning protocols. For all objective quality. The single-
to-noise ratio (SNR) associated with Idose3 were lower than FBP.Conclusion:With the use of prospective ECG-gating scanning
mode, low tube voltage, radiation dose is significantly reduced and optimal image quality is maintained. |
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