| 戴沁怡,贺毅,张兆琪,安靖.全心冠状动脉MR成像的图像质量及其影响因素[J].中国医学影像技术,2013,29(2):293~297 |
| 全心冠状动脉MR成像的图像质量及其影响因素 |
| Image quality and impact factors of whole-heart coronary MR angiography |
| 投稿时间：2012-08-11 修订日期：2012-12-08 |
| DOI： |
| 中文关键词: 冠状血管 狭窄 图像质量 磁共振血管造影术 |
| 英文关键词:Coronary vessels Stenosis Image quality Magnetic resonance angiography |
| 基金项目:国家自然科学基金(81171336)。 |
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| 中文摘要: |
| 目的 评价全心冠状动脉MR成像(WH CMRA)的图像质量及其影响因素。方法 对88例疑诊冠心病者,采用1.5T非对比增强、心电门控兼呼吸导航、T2预备脉冲并脂肪抑制的3D稳态自由进动序列扫描;采用4分制(1分,差;4分,优)评价图像质量,对得分2～4分者评估冠状动脉的狭窄程度,以CAG显示狭窄≥50%为标准评价MR的准确率。结果 ①完成组:79例(79/88,89.77%)完成WH CMRA检查,扫描时间(13.28±4.33)min,心率(67±8)次/分,呼吸导航效率(34.12±8.10)%,体质量指数(BMI)为(25.90±3.20)kg/m2;75例平均图像质量评分(2.9±1.0)分,4例图像质量为1分;②对照组:42例(42/75,56.00%)完成CAG检查,扫描时间(13.50±4.60)min,心率(67±10)次/分,图像质量评分(3.2±0.9)分,与CAG间隔(5±2)天;WH CMRA诊断冠状动脉狭窄的敏感度、特异度、阳性预测值、阴性预测值和准确率分别为90.48%(19/21)、66.67%(14/21)、73.08%(19/26)、87.50%(14/16)和78.57%(33/42);③完成组与对照组间平均年龄、心率、扫描时间、呼吸导航效率、BMI和图像质量间差异均无统计学意义(P均>0.05)。结论 WH CMRA图像质量大多能满足诊断需要,主要影响因素包括心脏搏动、呼吸运动和BMI。 |
| 英文摘要: |
| Objective To observe the image quality and impact factors of whole-heart coronary magnetic resonance angiography (WH CMRA). Methods Eighty-eight patients underwent WH CMRA without contrast material at 1.5T MR using 3D ECG-triggered, navigator-gated, fat-suppressed, T2-prepared steady state free precession sequence. Image quality of WH CMRA was evaluated using 4-point scale (1, poor; 4, excellent). Segments which scored of 1 were excluded from further analysis. The diagnostic performance of WH CMRA in detecting stenosis was compared with that of conventional CAG as stenosis ≥50%. Results ①Totally 79 patients (79/88, 89.77%) successfully completed examination in (13.28±4.33)min, their heart rate was (67±8)bpm, navigator accept rate was (34.12±8.10)%, body mass index (BMI) was (25.90±3.20)kg/m2. Qualitative image analysis was performed on 79 patients. Except 4 patients scored as 1, the average score for other 75 patients was 2.9±1.0. ②Conventional CAG was completed in 42 patients (42/75, 56.00%) in (13.50±4.60)min, and their heart rate was (67±10)bpm and image quality was 3.2±0.9. The time interval of WH CMRA and CAG was (5±2) days. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of WH CMRA for detecting coronary stenosis based on patient was 90.48% (19/21), 66.67% (14/21), 73.08% (19/26), 87.50% (14/16) and 78.57% (33/42), respectively. ③No significant difference of mean age, heart rate, scan time, navigator accept rate, BMI nor image quality was found between patients completed WH CMRA and CAG (all P>0.05). Conclusion The image quality of WH CMRA can satisfy diagnosis of coronary stenosis, which relates to heart rate, breathe pattern and BMI. |
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