| 马延贺,于铁链,李东,李锋坦.64层螺旋CT冠状动脉成像中前瞻性心电门控技术的应用价值[J].中国医学影像技术,2010,26(3):492~495 |
| 64层螺旋CT冠状动脉成像中前瞻性心电门控技术的应用价值 |
| Application value of prospective electrocardiogram-gating for 64-slice CT coronary angiography |
| 投稿时间：2009-10-08 修订日期：2009-12-07 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 冠状血管造影术 辐射剂量 心电门控成像技术 |
| 英文关键词:Tomography, X-ray computed Coronary angiography Radiation dosage Cardiac-gated imaging techniques |
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| 摘要点击次数: 1999 |
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| 中文摘要: |
| 目的 比较64层螺旋CT冠状动脉造影(CTCA)前瞻性心电门控与回顾性心电门控扫描的辐射剂量及图像质量。方法 连续选取60例疑似冠状动脉疾病患者,并随机分为两组:研究组30例 行前瞻性心电门控扫描,根据患者体重选择管电流(400 mA/500 mA);对照组30例 行回顾性心电门控扫描,管电流650 mA。分别计算两组的平均有效剂量(ED),以12 cm作为标准扫描长度计算标准化辐射剂量(ED标准),并进行统计学分析。同时对两组患者冠状动脉段的显示质量进行评估。结果 两组平均ED分别为(5.97±1.04)mSv和(26.25±2.36)mSv,经标准化后,ED标准分别为(5.49±0.45)mSv和(23.77±1.64)mSv。两组平均ED及ED标准的差异均具有统计学意义(P均＜0.001),研究组ED标准较对照组减少76.62%。两组图像质量的差异无统计学意义(χ2=4.26,P=0.235)。结论 前瞻性心电门控较回顾性心电门控技术能够在保证图像质量的同时明显减少辐射剂量。 |
| 英文摘要: |
| Objective To compare radiation dose and image quality between prospective and retrospective ECG gating CT coronary angiography (CTCA) with 64-slice CT scanner. Methods Sixty patients with suspected coronary artery disease were selected, and randomly devided into two groups. Thirty patients in research group (average body-mass index : kg/m2, heart rate ≤65 beats per minute ) underwent CTCA using prospective ECG-gating (120 kV, mA tailored to weight), while the rest 30 patients in control group (average BMI: kg/m2, heart rate ≤65 bpm) underwent CTCA using retrospective ECG-gating (120 kV, 650 mA). The average effective dose (ED) and standardizing radiation dose (EDSd) which was standardized by 12 cm length were respectively calculated, and statistical analysis was then conducted, meanwhile image quality was evaluated. Results The average ED of research group and control group was (5.97±1.04) mSv and (26.25±2.36) mSv, respectively (tA,B=43.13, P<0.05). The EDSd of two groups was (5.49±0.45) mSv and (23.77±1.64) mSv (tSd=59.00, P<0.05). EDSd decreased by 76.62% in research group compared with that of control group. No significant difference of image quality was found between two groups (χ2=4.26, P=0.235). Conclusion Prospective ECG-gating CTCA can effectively reduce radiation dose without compromising image quality. |
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